The Relationships among Quality of Online Education, Learning Immersion, Learning Satisfaction, and Academic Achievement in Cooking-Practice Subject

: The purpose of this study was to identify the problems of online education perceived by learners in a time when non-face-to-face online lectures are conducted due to the spread of COVID-19, and suggest measures to improve educational outcomes. Therefore, the structural inﬂuence of cooking practice on the quality of online lessons, learning immersion, learning satisfaction, and the achievement felt by learners was veriﬁed. The sample of the study was a college student majoring in cooking, and a total of 509 responses were used for analysis. The results of the study are as follows: First, it was analyzed that there was a signiﬁcant inﬂuence on learning immersion in the order of content, interaction, and educational environment among the quality of online classes. Second, among the quality of online classes, class content and educational environment showed positive (+) inﬂuence on learning satisfaction. Third, learning immersion and learning satisfaction showed a positive inﬂuence on academic achievement. Fourth, in the direct effect of online class quality on academic achievement, it was analyzed that only class content had a positive (+) effect. Based on the results of this study, the provision of learning materials with detailed explanations was suggested in the online cooking practice class rather than providing a simple cooking video. In addition, it was suggested that as a way to improve academic achievement of online education, it is necessary to provide content that allows learners to immerse themselves in class, as well as class content and educational environment, and consider learning satisfaction. Based on theoretical considerations and prior research on each variable, this study designed a research model such as Figure 1 to verify the relationship between quality of non-face-to-face online education (information quality, service quality, system quality) and learning immersion, learning satisfaction, and cognitive academic performance.


Introduction
Due to the COVID-19 global pandemic, gatherings and movement between people have been restricted and all patterns of daily life have been curtailed [1]. This new phenomenon of life has had an impact on all fields-such as society, culture, economy, and education. Universities have also embraced related technologies in the face of pandemic and started providing online education to students without time and space limitations [2]. Online lectures have the advantage of being able to learn at a place and time suitable for the learner's situation, and interactivity where teachers and learners can share knowledge wherever the internet is available [3]. Online classes are divided into real-time online classes and non-real-time online classes according to the simultaneity of teaching-learning among members [4]. In the field of higher education, the development and sharing of open course content has become an important issue. The US has been operating MOOC platforms such as Coursera, Udacity, and edX in 2012, and Korea has been a K-MOOC service since 2015 [5]. As such, online education has been implemented for several years in the past, but since it has been applied to all education fields due to COVID-19, the educational satisfaction of learners is negative. The reasons for the decrease in educational satisfaction include difficulties in interactive communication between instructors quality as important variables for the success of information systems, and since then, quality factors have often been used to determine the success of online classes. The key factors affecting the quality of online classes offered by universities should be evaluated in terms of student satisfaction, and the factors affecting student satisfaction are information quality, service quality, and system quality [25]. Chei and Lee [26] defined the quality of the class as the quality level that learners perceive for the learning environment, interaction, and class content.
As such, factors related to classes, such as the educational content and learning environment experienced by students in classes, are drawing attention [27]. Therefore, this study defined the quality of classes as class content (information quality), student-professor interaction (service quality), and online learning environment (system quality) based on studies such as Lee and Lee [25], Chei and Lee [26], Jeong [28]. Information quality refers to the quality of teaching design aspects such as the content of online classes and delivery methods and strategies, and service quality is a subjective evaluation that is recognized and judged by users. System quality refers to the technical level of accuracy and efficiency of the system [25]. Previous studies on online lectures are as follows.
However, there are a number of educational quality measurements and satisfaction surveys on online education in theoretical subjects, but it is difficult to find those focused on practical subjects. Therefore, this study aims to analyze the effect between the quality of non-face-to-face online education, immersion, satisfaction, and cognitive academic performance, focusing on the cooking practice subjects of universities after COVID-19.

Learning Immersion
Csikszentmihalyi [36,37] suggests that immersion is an intrinsic motivation construct in the sense that it is an intrinsically rewarding experience that does not require any external reward or goal other than the action itself. They also investigated that people experience immersion when perceived challenges and perceived abilities are balanced. Immersion can be divided into nine dimensions: clear goals, instant feedback, personal skills appropriate for a given challenge, integration of actions and consciousness, potential control sense, focus on tasks, loss of self-awareness, distortion of time sense, and selfobjective experience [38]. Early studies have defined immersion by measuring the time that learners are actually involved in a learning task [39], however, more recently it is referred to as the intensity of concentration, effort, and interest shown by learners [40], and Sustainability 2021, 13, 12152 4 of 18 it is defined as the quality of effort to focus on learning outcomes that learners want to achieve [41]. It is very important for learners to control and immerse themselves in their learning processes [42], because of the limited direct interaction with professors and the limited degree and immediacy of communication [43]. Thus, immersion in online lectures is one of the main factors for learners to achieve self-directed learning.

Learning Satisfaction
Satisfaction can be defined as a "total state of mind that is caused by a combination of emotions generated by a mismatch between the customer's actual experience and expectations and feelings before the purchase experience" [44]. Learning satisfaction means the degree of overall satisfaction after the learner has learned, determined by their evaluation of educational services or by the quality of the program [45].
Astin [46] has suggested that satisfaction is a subjective response to learners' educational experiences. Shin and Chan [47] conceptualized it as the degree to which an individual learner perceives a positive correlation between the learning process taken and the learner's individual learning experience. Kim and Kang [48] have suggested that learning satisfaction can help improve and reflect future programs as an indicator that can clearly show whether or not educational goals have been achieved. For Lee and Lee [26], Lee [49], and Park [50], satisfaction is one of the most important factors in discussing training performance, and is used as a variable in defining learning effectiveness.

Cognitive Academic Achievement
Academic achievement is often used in the field of education to assess the effectiveness of education [51]. Academic achievement is the result of the acquisition of learners' changes, developmental levels, knowledge, and skills, as a result of education [46], whether learners have a realistic implementation of learning and specific performance of learning content [52]. For Kim and Chung [53], it is an objective indicator that can measure learning performance, defined to the extent that we understand the learning content we obtain through training programs and achieve our learning goals. In particular, adult learners have a variety of educational experiences to judge the learning experience and have the ability to evaluate learning content [54]. Therefore, in this study, cognitive academic achievement is the subjective evaluation of what the learner themselves recognize about the learning activities performed.
Pace [55] proposed the use of self-reporting methods because there is no significant difference between the self-reporting method and the actual measured achievement score, and it shows consistency as a measurement tool. Jeon and Kim [56] also validated the feasibility by requiring learners to measure self-aware attitude changes, knowledge growth, and technology improvements for learning evaluation. Therefore, this study aims to measure academic achievement by measuring the self-reporting method of the learner's own subjective judgment, which can replace objective indicators.

Research Model and Hypotheses
Lee and Lee [25], Chei and Lee [26], Lee, Kim, and Kim [30] use the information system success model proposed by Delone and Mclean [24] to identify important factors that determine the success of online classes and used as a measure to evaluate quality.
The quality of instruction was composed of information quality (class content), service quality (interaction), and system quality (learning environment), and was set as a preceding variable to measure learning satisfaction and learning outcomes. Based on theoretical considerations and prior research on each variable, this study designed a research model such as Figure 1 to verify the relationship between quality of non-face-to-face online education (information quality, service quality, system quality) and learning immersion, learning satisfaction, and cognitive academic performance.
The quality of instruction was composed of information quality (class content) vice quality (interaction), and system quality (learning environment), and was set preceding variable to measure learning satisfaction and learning outcomes.
Based on theoretical considerations and prior research on each variable, this s designed a research model such as Figure 1 to verify the relationship between quali non-face-to-face online education (information quality, service quality, system qu and learning immersion, learning satisfaction, and cognitive academic performance.

Quality of Online Education and Learning Immersion
In a study by Kim,Shin,and Kim [29], ease of use, interaction quality, self-con and computer efficacy showed significant impact relations with learning immersion lecture quality and lecture content did not show significant impact. Kim, Roh, and Yu verified the impact on learning immersion by dividing content quality into inform quality (class content), service quality (interaction), and system quality (learning env ment). As a result, it was confirmed that information quality (class content) was sta cally significant with learning immersion. Ahn and Shin [58] studied the effect of face-to-face education quality on learning immersion and educational satisfaction fo dents majoring in tourism, showing static influence on learning immersion in the ord quality of education content, professor's reliability, and professor's response. Cho Ahn [35] showed the positive effects of learning immersion in the order of quality of cation programs, quality of instructors, educational environment, and quality of int tion. Based on prior research, Hypothesis 1 was established to verify the impact rela ship between the quality of the class and learning immersion.

Hypothesis 1 (H1).
The quality of online classes will have a significant impact on learnin mersion.

Quality of Class and Learning Satisfaction
Lee and Lee [25], Chei and Lee [26], Lee, Kim, and Kim [30] used it as a measu assess the quality of classes as an important factor in identifying the success of o classes. The quality of the class consisted of the contents of the class, interaction, and l ing environment, and was set as a variable to measure the learning satisfaction. As a r

Quality of Online Education and Learning Immersion
In a study by Kim,Shin,and Kim [29], ease of use, interaction quality, self-control, and computer efficacy showed significant impact relations with learning immersion, but lecture quality and lecture content did not show significant impact. Kim, Roh, and Yu [57] verified the impact on learning immersion by dividing content quality into information quality (class content), service quality (interaction), and system quality (learning environment). As a result, it was confirmed that information quality (class content) was statistically significant with learning immersion. Ahn and Shin [58] studied the effect of non-face-toface education quality on learning immersion and educational satisfaction for students majoring in tourism, showing static influence on learning immersion in the order of quality of education content, professor's reliability, and professor's response. Choi and Ahn [35] showed the positive effects of learning immersion in the order of quality of education programs, quality of instructors, educational environment, and quality of interaction. Based on prior research, Hypothesis 1 was established to verify the impact relationship between the quality of the class and learning immersion.

Hypothesis 1 (H1).
The quality of online classes will have a significant impact on learning immersion.

Quality of Class and Learning Satisfaction
Lee and Lee [25], Chei and Lee [26], Lee, Kim, and Kim [30] used it as a measure to assess the quality of classes as an important factor in identifying the success of online classes. The quality of the class consisted of the contents of the class, interaction, and learning environment, and was set as a variable to measure the learning satisfaction. As a result of the study, the contents of the class showed the greatest impact on learning satisfaction. A study on the effect of the culinary education service quality of the lifelong education center on the satisfaction of adult learners showed a significant effect on satisfaction in the order of reliability, certainty, and tangibility [59]. Kim, Choi, and Ma [60] showed that Sustainability 2021, 13, 12152 6 of 18 educational programs, educational environment, and educational services significantly affect satisfaction of quality of education services for students at cooking schools. Based on these studies, Hypothesis 2 was established to verify the impact relationship between the quality of the class and learning satisfaction, and to check the difference between online classes and face-to-face classes.
Hypothesis 2 (H2). The quality of online classes will have a significant impact on learning satisfaction.

Learning Immersion and Learning Satisfaction
Kim and Um [61] validated that the higher the learner's degree of immersion, the higher the satisfaction of the learning content, from the perspective of the cognitive experience of taking e-learning. Kim, Roh, and Yu [57] have confirmed that learning immersion has a static impact on learning satisfaction by verifying the relationship between learning immersion and learning satisfaction. Huh [62] confirmed the mediated effects of learning satisfaction and learning immersion in verifying the relationship of content quality in university online classes and the intent of learning continuity, and derived that learning immersion has a static impact on learning satisfaction. Thus, Hypothesis 3 is established to verify the relationship between learning immersion and learning satisfaction.

Hypothesis 3 (H3).
Learning immersion will have a significant impact on learning satisfaction.

Learning Immersion and Academic Achievement
Kim, Shin, and Kim [29] confirmed that learning immersion has a static impact on academic performance, and validated that learning immersion has a mediated effect on learning performance. Choi and Ahn [35] found that learning commitment had a positive (+) effect on academic achievement in the study of the relationship between educational service quality, learning immersion, and academic achievement in non-face-to-face learning. Studies in various fields have verified that learning immersion has a positive effect on academic achievement [63][64][65]. Thus, Hypothesis 4 is established to verify the relationship between learning immersion and academic achievement.

Hypothesis 4 (H4).
Learning immersion will have a significant impact on academic performance.

Learning Satisfaction and Academic Achievement
In the studies of Ko, Kim, and Kim [27], Lee and Kim [17], Lee and Lee [12], academic achievement showed a high correlation with learning satisfaction, and academic achievement was set as an exogenous variable to measure learning satisfaction, proving that its influence is significant. In addition, various studies have established hypotheses to investigate the relationship between learning satisfaction and academic achievement [9,31,33,66]. Thus, Hypothesis 5 was established to consider whether learning satisfaction would have a significant impact on cognitive academic performance.

Hypothesis 5 (H5).
Learning satisfaction will have a significant impact on cognitive academic performance.

Quality of Class and Cognitive Academic Achievement
A study was conducted on the effect of e-learning lecture quality on learning performance, and as a result of the analysis, it was verified that there is a positive relationship on learning performance in the order of interaction quality, lecture quality, and content quality [29]. Lee and Seo [31] validated the structural relationship between the quality of classes, learning satisfaction, and academic performance in remote education, confirming that the content of classes and the quality of service operations had a significant impact on academic performance. In addition, a number of studies were conducted to verify the indirect effects of mediating variables, such as learning commitment and learning satisfaction, on the influence of class quality on academic achievement. Kim and Park [33] Sustainability 2021, 13, 12152 7 of 18 conducted a study on K-MOOC students, demonstrating that the quality of instruction has a positive effect on academic achievement through learning satisfaction as a medium. Choi and Ahn [35] used learning commitment as a mediating variable in a study on the effect of non-face-to-face education service quality on academic achievement, and confirmed the positive impact relationship. Therefore, Hypothesis 6 was established to verify the influence of the quality of online cooking classes on cognitive academic achievement, and to confirm the mediating effect of learning immersion and learning satisfaction.
Hypothesis 6 (H6). The quality of online classes will have a significant impact on cognitive academic achievement.

Research Instrument
The questionnaire for hypothesis testing consisted of 31 questions based on previous research, and 18 questions about the quality of online education (8 questions for class content quality, 5 questions for interaction quality, 5 questions for educational environment quality), 4 questions for learning commitment, 5 questions for learning satisfaction, and 4 questions for cognitive academic achievement. Among them, 3 questions that hindered the validity and reliability were removed through a preliminary investigation.
In addition, 3 observational variables were removed to improve intensive validity and model fit for the finally collected 509 samples, and the questionnaire items used in the analysis of this study were 25 questions. A total 2 demographic questions (by gender, school type) and 4 questions about the experience of taking a non-face-to-face online lecture (number of courses taken, teaching methods, learning tools, computer literacy) are combined to determine the characteristics of the survey respondents. This consisted of 31 final questions. The questions are on a 5-point Likert Scale with 1 point for "not at all", 2 points for "no", 3 points for "normal", 4 points for "yes", and 5 points for "very much". The operational definition of all items and the source and detailed composition of the measured variables are summarized in Table 1.

Data and Sample
The sample of the study was conducted with university students who had experienced taking non-face-to-face online courses in cooking practice due to COVID-19 in 2020. The scope of the cooking practice courses included cuisines such as Korean, Western, Chinese, and Japanese, but also all practical subjects related to cooking such as baking, coffee making, and food and beverage skills. For the survey, a total of 100 preliminary surveys were conducted from 30 July to 10 August 2020 using the Google online questionnaire, and it was determined that there were no major problems in verifying the hypothesis through factor analysis and reliability verification. Therefore, a total of 550 survey responses were collected by adding 450 copies from 20 August to 14 October 2020. Among them, a total of 509 copies were used for the survey, excluding 22 copies of the sample that did not respond to some questions and 19 copies of unfaithful responses. AMOS 23.0 and SPSS 25.0 statistical programs were used, and the hypothesis was verified through descriptive statistics analysis, confirmatory factor analysis, and structural equation model analysis. Lee [68] 4. Results

Characteristics of Sample
Students who have taken courses in cooking practice are shown in Table 2. By gender, there were 269 male students (52.8%) and 240 female students (47.2%). The types of schools were 366 students (71.9%) as college students and 143 students (28.1%) as university students. As for the number of courses related to cooking practice, 42 students (8.3%) took 1 course, 83 students (16.3%) took 2 courses, 205 students (40.3%) took 3 courses, and 179 students (35.1%) took 4 or more courses. As for the online class method, 313 students (61.5%) of the blended classes that combine real-time and non-real-time online lectures accounted for the majority, followed by 128 real-time online classes (25.1%) and 68 nonreal-time online classes (13.4%). As for online learning tools, laptops accounted for half with 272 students (53.4%), followed by desktop-135 students (26.5%), smartphones-68 students (13.4%), and tablet PC-30 students (5.9%).

Confirmatory Factor Analysis and Reliability Analysis
The results of a confirmatory factor analysis to validate the theoretical model are shown in Table 3 below and visualized in Figure 2. First, the convergent validity test is a measure of how well observations can account for the latent variables, judging that the standardization coefficient (β) value is 0.5 or higher, the composite reliability (CR) value is 0.7 or higher, and the average variance extraction (AVE) is 0.5 or higher. As a result of the validation of the potential factors, the standardization coefficient (β) was 0.769 to 0.899, the AVE value was 0.733 to 0.789, and the composite reliability (CR) was 0.896 to 0.949. All factors exceeded the standard value, so it can be said that convergent validity was secured. In addition, the reliability verification of the measurement concept was validated with the Cronbach's α, a reliability analysis of the measurement tool based on the internal consistency method, in a way that determined exactly and consistently from the survey respondent. In general, a Cronbach's α of 0.7 or higher can be considered appropriate when checking reliability. According to the results, the Cronbach's α is 0.925, in the contents of the lecture, the Cronbach's α is 0.893 in interaction, the Cronbach's α is 0.876 in educational environment, the Cronbach's α is 0.883 in learning immersion, the Cronbach's α is 0.940 in learning satisfaction, and the Cronbach's α is 0.891 in cognitive academic performance. Therefore, all five factors were found to be above the standard of 0.7, indicating that they were reliable. Moreover, the fit of the model is χ 2 = 655.9496 (df = 260), p < 0.001, CMIN/DF = 2.523, RMR = 0.025 GFI = 0.903, AGFI = 0.878, NFI = 0.942, RFI = 0.933, IFI = 0.964 TLI = 0.959, CFI = 0.964, RMSEA = 0.055. It shows the common fit indices, recommended values, and analytical results for measurement model. According to the results, all the model-fit indices exceeded the respective common acceptance levels [69], indicating that the measurement model exhibited a good fit with the data collected.

Correlation Analysis and Validity Analysis
As a result of analyzing the degree of correlation between latent variables in confirmatory factor analysis, class content and interaction (r = 0.845, p < 0.001), interaction and educational environment (r = 0.843, p < 0.001), learning Satisfaction and academic achievement (r = 0.836, p < 0.001), learning commitment and academic achievement (r = 0.805, p < 0.001) showed high interrelationships in order. Therefore, by checking the degree of correlation between each factor, it can be inferred that there may be a significant influence between factors.
In addition, the discriminant validity of determining whether there is a difference between latent variables should be that the squared values of all correlation coefficients are less than the lowest AVE [70]. In this study, the squared value of the highest correlation coefficient was 0.714, which was lower than the lowest AVE value of 0.733, ensuring discriminant validity. As it can be seen in Table 4, the average variance extraction is presented in a diagonal direction for easy determination of discriminant validity, and the numerical value in parentheses is expressed as the coefficient of determination (r 2 ).

Correlation Analysis and Validity Analysis
As a result of analyzing the degree of correlation between latent variables in confirmatory factor analysis, class content and interaction (r = 0.845, p < 0.001), interaction and educational environment (r = 0.843, p < 0.001), learning Satisfaction and academic achievement (r = 0.836, p < 0.001), learning commitment and academic achievement (r = 0.805, p < 0.001) showed high interrelationships in order. Therefore, by checking the degree of correlation between each factor, it can be inferred that there may be a significant influence between factors.
In addition, the discriminant validity of determining whether there is a difference between latent variables should be that the squared values of all correlation coefficients are less than the lowest AVE [70]. In this study, the squared value of the highest correlation coefficient was 0.714, which was lower than the lowest AVE value of 0.733, ensuring

Results of the Hypotheses Verification
In this study, structural equation models (SEM) test each relationship between independent and dependent variable. Table 5 and Figure  The path analysis for hypothesis verification is as follows. As a result of the verification of Hypothesis 1, the quality of online class content (β = 0.246, t = 2.655, p < 0.01), interaction (β = 0.235, t = 1.969, p < 0.05) educational environment (β = 0.313, t = 3.216, p < 0.01) were analyzed to have a significant influence on learning commitment.
In the hypothesis verification of this study, the effects of online class quality (class content, interaction, educational environment) on learning immersion, learning satisfaction, and academic achievement were shown to be different. Therefore, it is estimated that the class content has a partial mediating effect of learning immersion and learning satisfaction, interaction is completely mediated by learning immersion, and educational environment is completely mediated by learning immersion and learning satisfaction. Therefore, to verify the mediating effect of learning immersion and learning satisfaction in the relationship between online education quality and academic achievement, the significance of the mediation effect according to the 95% confidence interval of bootstrap was tested. The results of verification of the multiple mediation effect are shown in Table 6.
First, when confirming the mediating effect of learning satisfaction in the relationship between class content and academic achievement, there was no '0' between the lower and upper limits of the 95% confidence interval (0.191~0.550), so the mediating effect was found to be significant. The indirect effect showed an estimated value of 0.284.
In the multiple mediating effect, which mediates learning immersion and learning satisfaction, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.002 to 0.114), and the indirect effect showed an estimated value of 0.056. In addition, significance was verified in the direct effect of class content on academic achievement, and it was confirmed that mediation by learning satisfaction, learning immersion, and multiple mediation by learning satisfaction had a partial mediation effect.  First, when confirming the mediating effect of learning satisfaction in the relationship between class content and academic achievement, there was no '0' between the lower and upper limits of the 95% confidence interval (0.191~0.550), so the mediating effect was found to be significant. The indirect effect showed an estimated value of 0.284.
In the multiple mediating effect, which mediates learning immersion and learning satisfaction, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.002 to 0.114), and the indirect effect showed an estimated value of 0.056. In addition, significance was verified in the direct effect of class content on academic achievement, and it was confirmed that mediation by learning satisfaction, learning immersion, and multiple mediation by learning satisfaction had a partial mediation effect.
Second, as a result of verifying the mediating effect of learning satisfaction and learning immersion in the relationship between interaction and academic achievement, significance was not verified in all paths.
Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed. When confirming the mediating effect of learning immersion, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.004 to 0.247), and the indirect effect was estimated at 0.113. As a result of confirming the mediating effect of learning satisfaction, the mediating effect was significant because there was no '0' in the 95% confidence interval lower limit and upper limit (0.010~0.192), and the indirect effect showed an estimated value of 0.089.  First, when confirming the mediating effect of learning satisfaction in the relationship between class content and academic achievement, there was no '0' between the lower and upper limits of the 95% confidence interval (0.191~0.550), so the mediating effect was found to be significant. The indirect effect showed an estimated value of 0.284.
In the multiple mediating effect, which mediates learning immersion and learning satisfaction, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.002 to 0.114), and the indirect effect showed an estimated value of 0.056. In addition, significance was verified in the direct effect of class content on academic achievement, and it was confirmed that mediation by learning satisfaction, learning immersion, and multiple mediation by learning satisfaction had a partial mediation effect.
Second, as a result of verifying the mediating effect of learning satisfaction and learning immersion in the relationship between interaction and academic achievement, significance was not verified in all paths.
Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed. When confirming the mediating effect of learning immersion, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.004 to 0.247), and the indirect effect was estimated at 0.113. As a result of confirming the mediating effect of learning satisfaction, the mediating effect was significant because there was no '0' in the 95% confidence interval lower limit and upper limit (0.010~0.192), and the indirect effect showed an estimated value of 0.089.   Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.
When confirming the mediating effect of learning immersion, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.004 to 0.247), and the indirect effect was estimated at 0.113. As a result of confirming the mediating effect of learning satisfaction, the mediating effect was significant because there was no '0' in the 95% confidence interval lower limit and   Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.
When confirming the mediating effect of learning immersion, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.004 to 0.247), and the indirect effect was estimated at 0.113. As a result of confirming the mediating effect of learning satisfaction, the mediating effect was significant because there was no '0' in the 95% confidence interval lower limit and   In the multiple mediating effect, which mediates learning immersion and learning satisfaction, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.002 to 0.114), and the indirect effect showed an estimated value of 0.056. In addition, significance was verified in the direct effect of class content on academic achievement, and it was confirmed that mediation by learning satisfaction, learning immersion, and multiple mediation by learning satisfaction had a partial mediation effect.
Second, as a result of verifying the mediating effect of learning satisfaction and learning immersion in the relationship between interaction and academic achievement, significance was not verified in all paths.
Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.
When confirming the mediating effect of learning immersion, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.004 to 0.247), and the indirect effect was estimated at 0.113. As a result of confirming the mediating effect of learning satisfaction, the mediating effect       Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.
When confirming the mediating effect of learning immersion, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.004 to 0.247), and the indirect effect was estimated at 0.113. As   Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.
When confirming the mediating effect of learning immersion, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.004 to 0.247), and the indirect effect was estimated at 0.113. As   Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.
When confirming the mediating effect of learning immersion, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the     In the multiple mediating effect, which mediates learning immersion and learning satisfaction, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.002 to 0.114), and the indirect effect showed an estimated value of 0.056. In addition, significance was verified in the direct effect of class content on academic achievement, and it was confirmed that mediation by learning satisfaction, learning immersion, and multiple mediation by learning satisfaction had a partial mediation effect.
Second, as a result of verifying the mediating effect of learning satisfaction and learning immersion in the relationship between interaction and academic achievement, significance was not verified in all paths.
Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.
When confirming the mediating effect of learning immersion, the mediating effect was   In the multiple mediating effect, which mediates learning immersion and learning satisfaction, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.002 to 0.114), and the indirect effect showed an estimated value of 0.056. In addition, significance was verified in the direct effect of class content on academic achievement, and it was confirmed that mediation by learning satisfaction, learning immersion, and multiple mediation by learning satisfaction had a partial mediation effect.
Second, as a result of verifying the mediating effect of learning satisfaction and learning immersion in the relationship between interaction and academic achievement, significance was not verified in all paths.
Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.
When confirming the mediating effect of learning immersion, the mediating effect was   In the multiple mediating effect, which mediates learning immersion and learning satisfaction, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.002 to 0.114), and the indirect effect showed an estimated value of 0.056. In addition, significance was verified in the direct effect of class content on academic achievement, and it was confirmed that mediation by learning satisfaction, learning immersion, and multiple mediation by learning satisfaction had a partial mediation effect.
Second, as a result of verifying the mediating effect of learning satisfaction and learning immersion in the relationship between interaction and academic achievement, significance was not verified in all paths.
Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.
When confirming the mediating effect of learning immersion, the mediating effect was   Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.   Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed.       In the multiple mediating effect, which mediates learning immersion and learning satisfaction, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.002 to 0.114), and the indirect effect showed an estimated value of 0.056. In addition, significance was verified in the direct effect of class content on academic achievement, and it was confirmed that mediation by learning satisfaction, learning immersion, and multiple mediation by learning satisfaction had a partial mediation effect.
Second, as a result of verifying the mediating effect of learning satisfaction and learning immersion in the relationship between interaction and academic achievement, significance was not verified in all paths.   Second, as a result of verifying the mediating effect of learning satisfaction and learning immersion in the relationship between interaction and academic achievement, significance was not verified in all paths.
Third, in the relationship between educational environment and academic achievement, the mediating effect of learning immersion and learning satisfaction was confirmed. When confirming the mediating effect of learning immersion, the mediating effect was found to be significant because there was no '0' between the lower and upper limits of the 95% confidence interval (0.004 to 0.247), and the indirect effect was estimated at 0.113. As a result of confirming the mediating effect of learning satisfaction, the mediating effect was significant because there was no '0' in the 95% confidence interval lower limit and upper limit (0.010~0.192), and the indirect effect showed an estimated value of 0.089.
Finally, in the multiple mediation effect by learning immersion and learning satisfaction, the mediating effect was significant because there was no '0' in the 95% confidence interval lower limit and upper limit (0.016~0.155), and the indirect effect was an estimated value of 0.071. In addition, the hypothesis verification showed that the direct effect of the educational environment on academic achievement was not significant, and it was confirmed that all three mediating paths had a completely mediated effect.

Discussion
Due to COVID-19, most higher educational institutions have pivoted from face-to-face lectures into online lectures, causing confusion for both instructors and learners. In particular, cooking-related subjects that require skill mastery through practical training have many limitations in achieving learning goals only through online education. Accordingly, this study aims to identify the problems of online education from the learner's perspective, suggesting ways to improve individual learning satisfaction and educational performance through segmentation of students. The structural impact relationship on learning satisfaction and the cognition of achievement felt by learners was confirmed. The results of this study are summarized as follows.
First, among the quality of online classes, the quality of class content had a significant influence on immersion, satisfaction, and achievement, and the educational environment had a positive (+) effect on immersion and satisfaction. The direct effect of online class quality on academic achievement was found to have a positive (+) effect on class content.
These results showed a difference in the degree of influence, but it was consistent that the class content factor showed the greatest influence on satisfaction and academic achievement [25,26,57,58]. On the other hand, among the class quality of e-learning, lecture content and lecture quality do not have a significant influence on learning immersion, and unlike the study of Kim, Shin, and Kim [29], who argued that interaction quality had the greatest influence on academic achievement. contradictory results.
Second, learning immersion was found to have a positive (+) effect on learning satisfaction. This was found to be consistent with the research results of Kim and Park [63], Choi, Yeo, and Jeong [64], Lee, Kim, and Lee [65]. This indicated that learning immersion in online classes is an important influencing factor for improving learning satisfaction. In addition, learning immersion and learning satisfaction showed a positive influence on academic achievement. This result supported the studies of Kim and Park [33], Kim [10], but studies by Joo, Ha, Yoo, and Kim [71], Lee and Seo [31], show that there is no relationship between learning satisfaction and academic achievement, which is the opposite result.
Third, to verify the mediating effect of learning immersion and learning satisfaction on the relationship between online education quality and academic achievement, the significance of the mediating effect was tested according to the bootstrap 95% confidence interval. As a result, it was found that there was a partial mediation effect on the simple mediation by learning satisfaction and the multiple mediation through learning immersion and learning satisfaction in the course, where the content of the online classes influences academic achievement. Comparing the direct and the indirect effect, the simple mediation path by learning satisfaction showed the greatest influence. In addition, in the relationship between educational environment and academic achievement, significance was verified in both the mediation of learning immersion, the mediation of learning satisfaction, and the multiple mediation of learning immersion and learning satisfaction. Therefore, it was found that the direct effect was not significant, confirming that there was a complete mediation effect in all indirect paths, and as a result of comparing the path values, the indirect effect through learning immersion was found to be the greatest. These results support the research results of Kim and Park [33], which mediate learning satisfaction, and the research results of Kim, Shin, and Kim [29], Choi and Ahn [35], which mediate learning immersion.
The implications based on the results of this study are as follows. First, academic achievement and learning satisfaction were measured as indicators for judging the performance of online classes in culinary courses, and there is academic value in applying the information system success model proposed by Delone and Mclean [24] to explore the factors affecting learning performance. In addition, it is possible to indirectly grasp the performance of online cooking education by verifying the influence of educational performance factors based on the learner's subjective perception, and present empirical data to prepare for a post-COVID-19 future. Lastly, in the context of limited research on online classes in practical subjects, there is an academic significance of verify-ing its influence through empirical research on the quality of online instruction, learning immersion, learning satisfaction, and academic achievement.
Second, among the factors of class quality, class content showed the greatest influence on achievement and learning satisfaction. In other words, in the online cooking class, the content of the class was found to be important among the class quality as a factor that improves the learner's achievement and satisfaction. Therefore, when conducting a cooking practice class online, it is necessary to pay more attention to the learning materials so that a clear educational goal can be presented and self-directed learning can be achieved rather than face-to-face lessons. Rather than just showing the video, it is necessary to proceed in the direction of solving the curiosity of online lectures by providing detailed explanations and various examples according to the learner's level. In order to improve the academic achievement perceived by the learner, it is necessary to simultaneously satisfy the learner's psychological satisfaction and positive emotions, as well as the quality of learning materials and class content.
Third, among the factors of class quality, interaction showed the lowest effect on learning commitment, and did not have a significant influence on learning satisfaction and academic achievement. This is similar to the result of Lim, Park, and Park [59]'s study on the relationship between quality and satisfaction of culinary education service, in which responsiveness and empathy among service quality factors are not significant. In addition, the importance of interaction was relatively low due to non-real-time online education. Interactivity can predict to what extent online education can replace face-to-face classes [3], and the fact that no significant results are shown, even though it is an important factor for evaluating the results of education, implies a limitation of non-real-time online education.
Therefore, in the case of culinary education, real-time online education is considered to be more suitable to improve learning satisfaction and academic achievement, and when non-real-time online education is conducted, it is suggested that counseling and communication time for students outside of class hours are provided. In addition, the communication between the instructor and the learner is judged to have no significant effect on the satisfaction of the learner because the accessibility and responsiveness are inferior compared to the existing face-to-face classes. In particular, in the case of cooking practice subjects, learning through physical behavior is common, but in the case of online classes, the importance of interaction is thought to be low because actual experience is not possible. Therefore, the online cooking class does not place much emphasis on interactivity, but it is considered that immediate feedback and processing of requirements should be performed as an additional means to improve satisfaction.
Fourth, among the factors of class quality, online education environment was verified as a major factor in improving learning immersion and learning satisfaction. On the other hand, there was no direct influence on academic achievement, but indirect effects using mediation showed influence. In particular, when mediating learning immersion, its influence was found to be the greatest. In other words, it was confirmed that the quality of the educational environment is also an important variable in improving learners' achievement. Therefore, in the university, it is necessary to constantly check the system and build a large-capacity server so that all learners can access the program easily, and they will have to do their part in developing and equipping various programs so that instructors can select programs that are convenient to use. In addition, it is necessary for the instructor to check the online system and the quality of the video before class, and it is considered that familiarization should be preceded.
Despite providing the above practical implications, the limitations of this study are as follows.
First, there is a lack of generalization of all culinary students by selecting nonprobabilistic sampling. Second, the quality of online education was analyzed for the cooking practice subject, but the research was limited in the part that used the scale suitable for the theory class. Third, online education has limitations in generalizing online education in that different tools and systems are applied for each school and for each major. Based on the implications and limitations suggested by the researcher, the following studies are considered necessary.
Second, there is a need to compare and analyze the satisfaction and academic achievement of face-to-face practice classes and online lectures, and a comparative study on real-time education and non-real-time education in online education is considered to be necessary. Lastly, it is necessary to investigate factors that influence quantitative indicators such as credits, practical evaluation results, and acquisition of related qualifications, not subjective academic performance perceived by learners.