Sport Education and Traditional Teaching: Influence on Students’ Empowerment and Self-Confidence in High School Physical Education Classes

Physical Education (PE) is recognized for its value in developing personal and social development. However, the instructional approach adopted by the teacher may affect the achievement of positive outcomes. This study aimed to examine the effects of two different teaching approaches, Traditional Teaching (TT) and the Sport Education (SE) model, on students’ empowerment and self-confidence in high school PE classes. A total of 430 high-school students (66.7% male), aged 14–21 years (M = 16.22, SD = 1.03) enrolled in 10th, 11th and 12th grades, participated in this study. A pretest-posttest quasi-experimental design was used across 18 classes. Classes met two times a week during a period of 8 weeks for a total of 1080 min. The Psychological Empowerment Instrument was used to measure empowerment. Students’ self-confidence was measured with the self-confidence sub-scale of the Competitive State Anxiety Inventory-2. The findings of the research revealed that only SE was effective in improving high school students’ empowerment and self-confidence. In the TT group, no gains were found, even decreasing over time. These results reinforce the adequacy of SE in PE as a curricular model to be used by teachers, particularly for the development of students’ empowerment and self-confidence.


Introduction
We live in a constantly changing world, and adaptability is a skill that everyone needs. In the school context, the ever-changing society calls for teachers to be more responsive to students' needs, supporting them to more successfully meet life's challenges [1,2]. Here, educational policies and curriculum guidelines emphasize the students' personal and social development as a fundamental goal of contemporary education. In particular, Physical Education (PE) is recognized for its value in developing positive attitudes and values that contribute to students' personal and social development [3,4]. Nevertheless, evidence suggests that simple participation in PE classes does not automatically lead to positive outcomes [5,6]. It may or may not positively influence the development of students' personal and social skills [7,8]. Rather, it is requested that there is an empowering education that prepares and supports students to succeed in dynamic and collaborative work environments, where cooperation, self-direction, self-confidence, and communication are key competencies [9]. Therefore, it is necessary to create pedagogical environments and circumstances that promote students working collaboratively, cohesively, and constructively, through which positive outcomes can be encouraged and acquired [10]. Examples of those pedagogies include cooperative learning [11], experiential learning [12], and problembased learning [13]. represent their interests, becoming stronger and more confident [38]. Self-confidence refers to individuals' beliefs that they can accomplish a given task or achieve a desired objective [39].
Empowerment and self-confidence show themselves to be closely linked concepts to learning. If students feel empowered and confident to act, they will likely learn in the process, be more able to engage in challenges and opportunities, and experience a greater ability to take control or to make changes in their own lives. Particularly, PE has the potential to promote and develop personal qualities and experiences essential to increase students' empowerment and self-confidence [40].
Although it has been recognized that variables such as empowerment and selfconfidence are important goals of education [41], and that PE can be a medium of these variables [42,43], few studies were conducted in this scope.
In the specific case of SE, it is believed that by providing students with decision-making opportunities and encouraging them to solve problems on their own, they can develop a sense of feeling in control which reinforces their sense of empowerment. Consequently, this control is associated with positive and successful experiences, which can boost their self-confidence [40,44]. The scarce results corroborate the positive impact of a SE season on students' empowerment given the opportunities to students to solve problems and make decisions [45][46][47]. Evidence also suggests that students develop self-confidence through participation in a SE season due to opportunities to take on roles that encourage them to talk with their peers and make collective decisions [48,49].
Research comparing SE and TT tends to analyze the differences between both models on the motor and cognitive domains (e.g., physical activity, content knowledge, and technical and game performance), and its impact on the development of personal and social skills [50]. In this respect, comparisons between SE and TT have focused more on the constructs of autonomy (e.g., [51]), motivation (e.g., [52]), and enjoyment (e.g., [53]), all of which show superior results when students experience a season of SE. In essence then, the teaching styles of SE tend to be particularly autonomy supportive [54][55][56], while those adopted in the comparison TT conditions reflect more closely to controlling styles.
To the best of our knowledge, the impact of a SE season and a more traditional unit in developing student s empowerment and self-confidence has not been directly measured or compared in previous research. Rather, they are part of a set of outputs obtained through the perceptions of students or teachers about the instructional models (e.g., [46,47,49]).
Furthermore, most of the comparative studies between TT and SE, as well as studies focusing on the personal and social skills within SE reported in the literature, have involved experienced teachers as the instructors [37,57]. Recognizing that research indicates that preservice teachers (PSTs) points out some difficulties in applying different teaching models [58,59], it is relevant to develop studies with PSTs that gives them training experiences likely to challenge them to use different pedagogies and fill possible gaps, both in content knowledge and in pedagogy strategies. Consequently, it sets the stage for PSTs' ability and motivation to implement different teaching models in the future [60].
For specific learning outcomes, optimal learning environments need to be designed [22]. There is still a lack of controlled comparisons between TT and SE in promoting empowerment and self-confidence as personal and core learning outcomes, and still more involving PSTs. It is an opportunity to challenge PSTs and to inform the physical education teacher education (PETE) programs, seeking to optimize the process of learning to teach PE [61,62]. The use of classes taught by PSTs allows knowing whether PSTs are using each teaching approach appropriately, and understanding if their students perceive any differences between teaching approaches.
Furthermore, research on this topic allows the dissemination of relevant data that shows the strengths of different approaches to the development of students' engagement and responsibility. Indeed, this study may contribute to overcoming potential barriers to the implementation of different PE teaching approaches, such as resistance within some PE departments or in-service teachers' own beliefs and habits [63].
Aligned with the aforementioned, this study aimed to examine the effects of the two different teaching approaches (TT or SE), on students' empowerment and self-confidence, in high school PE classes. It was hypothesized that students empowerment and selfconfidence would be significantly greater following SE than TT (Hypothesis 1). Furthermore, it was hypothesized that students' empowerment and self-confidence would significantly improve only for those in the SE classes (Hypothesis 2), with no such improvements within classes taught using the TT (Hypothesis 3).

Participants and Setting
A total of 430 high-school students (66.7% male) in 8 schools in northern Portugal took part in the study. The sample was composed of 224 girls and 206 boys and ranged in age from 14 to 21 years (M = 16.22, SD = 1.03). These students were in grades 10 (n = 199; 8 classes), 11 (n = 181; 8 classes), and 12 (n = 50; 2 classes).
The 18 PSTs (12 male and 6 female) involved in this study were in the final year of their master's degree program in "Teaching of Physical Education in Primary and Secondary Education" at a large public university in northern Portugal. In the previous year of their coursework, all PSTs had completed practical experiences as learners across several PE content areas, and had experience with both teacher and student-centered approaches. The PSTs also had experience teaching TT and SE lessons during the previous year of their coursework. Furthermore, during their student teaching, the PSTs taught full versions of the models under the supervision of experienced teachers who were familiar with each approach and model. All PSTs had previously taught units of TT and SE with the same classes, as this study was conducted during the third term of the school year. For this study, the PSTs only taught one of the two conditions (TT or SE) to their class.
The ethics committee of the first author's university approved the protocol of the study, and all participants provided assent following parental informed consent.

Design
The study design was a quasi-experimental pretest-posttest, used across 18 classes from 8 different schools. Pretests took place in the first lesson, while posttests took place at the last lesson of the unit.
Two hundred and forty lessons across ten different classes at 6 schools were taught using the TT approach, while 192 lessons across 8 different classes were taught at 6 schools following the key principles of SE. All classes were co-educational and met twice a week over a period of 8 weeks (one lesson was scheduled for 45 min and the other for 90 min). This total instruction time of 1080 min easily exceeded the recommended minimum of 800 posited by Siedentop et al. (2011) as necessary for a fully-fledged experience of SE at the secondary level. Table 1 shows the list of schools, model, seasons/units, grades, and participants.

Traditional Teaching
Ten TT units were completed across 6 schools and involved a total of 226 students from 10 different classes. The TT unit was characterized by teacher-controlled decisions and teacher-directed engagement patterns for students. The PST was responsible for the main managerial control: established the learning content, implemented class warm-ups, defined the patterns of the technique model, controlled the rhythm of the tasks, as well as the engaged time in the exercises and transition between activities. The PST delivered positive and corrective feedback to students frequently. Lessons began with basic skill drills to game play, with practice organized in lines of students providing high rates of practice and repetition. In the final part of each lesson, students chose teams to compete against each other (students had different teammates each lesson). The last three lessons were solely dedicated to competition between teams, organized by the PST. All record-keeping was conducted by the teacher. No formal statistics were kept. Students were engaged in whole-class instruction and were not responsible for roles such as refereeing and scoring.

Sport Education
The SE seasons followed the six key characteristics described by Siedentop and Tannehill [64] to ensure the most authentic experience. These are seasons, affiliation, formal competition, record keeping, festivity, and a culminating event.
In the initial lessons (1-2), the PST presented the model, described the roles, and explained the competition format. Equally skilled teams were created by the PST, following the criterion of homogeneity in gender and level of motor ability. These teams were maintained throughout the entirety of the season. After being placed on teams, the students assigned roles, designed colored shirts, and determined their team name. All students practiced different roles (at some point of the season) such as coaching the team, refereeing games, scorekeeping, and keeping team and individual statistics; however, no formal statistics were posted. The following four lessons (3)(4)(5)(6) were led by the PST for basic skills introduction. In the student-led phase, the lessons began with a warm-up (led by students), practice in the first half, with the second half seeing formal competition. Lessons 7 through to 15 involved teams practicing and competing against each other while learning roles such as referee, scorekeeper, and statistician, while lessons 16 through to 23 were dedicated to a tournament. In these lessons, scores related to fair play were attributed, which were counted towards the final score of each team. The last lesson consisted of a final competition and awards ceremony.

Validity of Instruction
A 10-item checklist with benchmarks [65] was used to assess the behavioral fidelity of the PST's instruction according to SE or TT ( Table 2). The checklist asks a trained observer to make decisions about whether an item is representative of the lesson. In this case, two experts in instructional models with extensive research in instructional models, examined videotapes of four randomly selected lessons of each class to confirm the characteristics of the model used in the lessons. Analysis across the two experts revealed an inter-observer agreement of 100%, confirming the instructional model used in the lessons.  To be effective, an instructional model needs contextual conditions such as teacher proficiency and student willingness for the model [22].
All PSTs were familiar with both models, having previously taught units/seasons of TT and SE. All PSTs were familiar with both models, having experienced SE and TT as participants during their on-campus coursework, and having taught units/seasons of TT and SE. The SE PSTs also attended a three-hour SE workshop led by an investigator who was familiar with the SE curriculum and the challenges implementing this model in schools.
There was sufficient space and equipment (e.g., balls, scorers, whistles, etc.) in all schools for every class to create adequate pedagogical and practical conditions. Table 3 provides data confirming the characteristics of the model used in the lessons by each PST.

Instruments
Empowerment. Spreitzer's [66] 12-item Psychological Empowerment Instrument (PEI), translated and adapted for Portuguese populations by Santos et al. [67], was used to measure empowerment. The PEI test and retest reliability has been shown to be strong and the validity estimates for the dimensions are typically around 0.80 (e.g., [68]). The items are distributed by four dimensions: meaning, competence, self-determination, and impact. Meaning reflects the value of a work goal or purpose, judged in relation to an individual's own ideals or standards [69]. Competence, or self-efficacy, reflects an individual's belief in his or her capacity to perform activities with skill [70]. Self-determination reflects autonomy in the initiation and continuation of work behaviors and processes [71]. Impact reflects the degree to which an individual can influence strategic, administrative, or operating outcomes at work [72]. Sample items include, "The role that I have in class is very important to me" (meaning); "I am confident with the performance that I have in PE class" (competence); "I have significant autonomy in determining how I do my tasks in PE class" (self-determination); and "I have a great deal of control over what happens in PE class" (impact). All items were measured using a 7-point Likert-type scale that ranged from 1 (totally disagree) to 7 (totally agree).
Self-confidence. Self-confidence was measured with the 9-item self-confidence sub-scale of the Competitive State Anxiety Inventory-2 (CSAI-2) [73] translated and adapted for Portuguese populations by Vasconcelos-Raposo [74]. CSAI-2 has been widely used by researchers as a means of explaining the independent forms of influence of somatic anxiety, cognitive anxiety, and self-confidence on sport performance. The validity and reliability of this instrument has been verified by Gabilondo, et al. [75] Sample items include "I feel at ease" and "I feel secure". All items were measured using a 5-point Likert-type scale that ranged from 1 (never) to 5 (always).
Both questionnaires were completed in a classroom setting during school time in the presence of the first author. Average completion time was 10 min. Pre-test data were collected in the first lesson of the unit/season, while post-test data were collected following the last lesson of the unit/season.

Data Analysis
The IBM Statistical Package for the Social Sciences (version 26) was used to analyze the data. The descriptive analysis conducted to characterize the samples revealed nonnormality of the distribution of data. Therefore, non-parametric statistics were used. Scale reliability was obtained for the pre-and post-test using Ordinal alpha for Likert data. Ordinal alpha is conceptually equivalent to Cronbach's alpha and it performs better for ordinal data [76].
The Mann-Whitney test for two independent samples (empowerment and selfconfidence) was used to test the differences between groups in two assessment moments, the pre-test (PreT) and the post-test (PosT). To test intra-group differences from the PreT to the PosT, the Wilcoxon test was applied. When the Wilcoxon's yielded a significant difference, subsequent analyses were performed at the subscale level to provide an insight into the precise location of differences. The effect size was estimated with the r statistic for non-parametric tests [77] using the formula: r = Z/ √ N where Z represents the Z score resulting from the non-parametric test; and, N to the total number of subjects. According to Cohen [78], a small effect size with r < 0.30, a moderate effect size with r between 0.31 and 0.50, and a large effect size with r > 0.50 were considered. The statistical level to determine the significance was set at p < 0.05.

Results
Tables 4 and 5 present the Ordinal alpha coefficients and descriptive statistics for both conditions and all measures at pre-and post-test. The Ordinal alpha coefficients of all subscales yielded values above 0.70, which can be considered acceptable [79]. Regarding the descriptive statistics, there are certain changes in means and standard deviations between the pre-and post-test in both groups.  In the PreT, initial homogeneity among groups was assessed using the Mann-Whitney test on the dependent variables: self-confidence and empowerment (Table 6). In the PosT, significant differences were found between SE and TT groups on students' perceptions of empowerment (p = 0.001), with a small effect size (r = 0.17). Moreover, significant differences were found on students' perceptions of self-confidence (p < 0.001), with a small effect size (r = 0.18). Table 7 presents the results of the Wilcoxon Rank test used to analyze the differences obtained within groups. Significant pre-post intervention differences were found among the study groups on the examined dependent variables (Table 7). Regarding the SE group, there were considerable improvements on student's perceptions for both variables, empowerment (p < 0.001, r = 0.42) and self-confidence (p < 0.001, r = 0.31), from pre-to post-test. No significant differences were found in the perceptions of students in the TT group for any variable.  Table 8 shows subsequent analyses performed at the empowerment subscale level to provide insight into the precise location of differences. Considering the SE students' perceptions, results revealed significant increases on all subscales (p < 0.001), presenting a large effect size for impact (r = 0.50), and a considerable effect size for meaning (r = 0.40), competence (r = 0.26), and self-determination (r = 0.26).

Discussion and Conclusions
The purpose of the current study was to examine the effects of the implementation of two different instructional models (SE and TT) by PSTs on students' empowerment and self-confidence in high school PE classes. Results of the present study showed that only SE was effective in improving high school students' empowerment and self-confidence, supporting the first hypothesis. This effectiveness was confirmed by the comparison with the data from the TT group, with significant increases for the SE group in the studied variables. While in the SE group the participants exhibited significant improvements in their empowerment and self-confidence levels, in the TT group, no gains were found, confirming the second and third hypotheses respectively. In fact, in the TT group, the levels of empowerment and self-confidence decreased over time, even though this decrease was not significant. This sort of effect has previously occurred in the Spittle and Byrne [80] study, in which the traditional condition was associated with decreases in student personal and social variables, namely in perceived competence, task orientation, and mastery of climate. According to these authors, these effects may be due partly to high initial levels of motivation. Furthermore, the length of the TT unit may also have contributed to these decreases, since traditionally, this type of PE classes rarely spends so much time on just one sport. If the experience is not being positive and successful, students can become demotivated, compromising their sense of empowerment and self-confidence.
When considering the decrease in the perception of empowerment by students in the TT group, a possible explanation for these results lies in the fact that the PST was responsible for making all the decisions (planning, instruction, assessment, students' engagement patterns, etc.), limiting students to a passive and reproductive behavior, with no space to make decisions or solve problems.
On the other hand, the decrease (although not significant) obtained in the students' self-confidence in the TT group, when there is a high frequency of positive feedback from the teacher, is noteworthy. This may be because students have previously experienced other models, namely SE, and eventually could have perceived less opportunities to develop this variable. Furthermore, we also believe that the empowerment results may have influenced this result. That is, if the students do not feel empowered, they do not feel self-confident.
The efficiency of SE in improving students' empowerment and self-confidence lies primarily in the strategies used during the season. Examples are the possibility of assuming particular roles and responsibilities that encourage students to talk and make decisions, the opportunity to have some degree of control over their learning process, and to provide students with opportunities to solve problems and make decisions. In this sense, students can experience boosts to their self-esteem and self-confidence. Likewise, providing students with decision-making opportunities and encouraging them to solve problems on their own may help them feel in control. This can eventually reinforce their sense of ownership and empowerment, both of which are important ingredients in the development of self-confidence.
Concerning the SE gains on the studied variables, similar results have been reported in the investigation of Gil-Arias, Harvey, Cárceles, Práxedes, and Del Villar [45], where in a hybrid TGfU/SE unit, students felt empowered because they were provided with the opportunity to solve specific tactical problems. Likewise, Hastie and Buchanan [46] incorporated throughout a hybrid TGfU/SE unit numerous instances of problem-solving without providing the solution, which they suggested contributed to students' empowerment. Regarding self-confidence, our results are consistent with previous research, which has indicated that the self-confidence enhancing strategies, the supportive learning environment, as well as the performance of different roles used in a SE season, were the key to the positive development of students' self-confidence [48,49].
A review of the research concerning students' development of personal and social skills when participating in PE classes with SE [37] indicates that only 23% of studies (12 studies) incorporate a comparison with a TT. Of these, only two studies [81,82] had PSTs teaching the PE classes, with both reporting significant improvements. Regarding the effect sizes of the SE season, results of the present study confirmed not only the change in the variables studied but also moderate-to-large magnitudes of those effects. Similar results were achieved in different studies using experienced teachers [37], which suggests that PSTs are using each teaching approach appropriately.
Despite the literature on the experiences of PSTs in teaching SE identifying certain challenges such as the omission of vital aspects of the model [58,59] or problems in encouraging students to work [83], the outcomes of this study suggest that PSTs who taught SE were able to create favorable conditions for the development of empowerment and self-confidence. These results highlight the effectiveness of the PETE program that the PSTs attended, which takes into account Curtner-Smith's [61] recommendations of providing practical experiences, as learners and teachers, with different approaches and teaching models, supervised by experienced teachers.
We can note several strengths within the current study. First, teacher fidelity to teach each of the models was measured and reported. Second, it utilized a large sample at different schools. Third, the SE season's length exceeded the recommendation as appropriate for a high school SE season [21]. However, research has shown that programs regarding social and emotional learning need to be ongoing and adopt a multi-year approach. Thus, in reinforcing the suggestions of past reviews [36,[84][85][86], future research should adopt more longitudinal data collection protocols, involving multiple seasons/units. This research suggests the suitability of the SE in PE classes but is not without limitations. In order to reduce the "teacher effect" that may occur when different teachers teach different instructional approaches [87], future research must use the same teacher in the same grade to teach all the groups. The already formed classes in schools made difficult the random assignment of students, but should be considered a limitation of the design. Future studies might consider developing experimental studies since randomly assigning students to experimental and comparison conditions provides greater certainty that differences between groups on outcome measures result from the intervention. Another limitation is that this study was carried out in PE classes' real context decreasing the internal validity. However, the importance of ecological validity must also be considered, which consequently makes its results and conclusions relevant.
To reinforce the positive impact of different teaching models on personal and social skills, it would be important for future research to consider variables (such as responsibility, creativity, or assertiveness), that meet the best interests and needs of today's young people. Once significant improvements in empowerment and self-confidence help students tackle potential social problems they may face in their lives, future research can further explore these results with qualitative methodologies seeking additional explanations that can improve our understanding.
The results of this study provide support for SE as a viable option for providing students with new experiences, and as a feasible curricular model for teachers in order to promote empowerment and self-confidence in PE.