How Do Time Use and Social Relationships Affect the Life Satisfaction Trajectory of Korean Adolescents?
Abstract
:1. Introduction
2. Materials and Methods
2.1. Sample
2.2. Measures
2.3. Statistical Analysis
3. Results
3.1. Descriptive Anlaysis
3.1.1. Individual and Family Characteristics
3.1.2. Changes in LS, Time Use, and Relationship Characteristics
3.2. HLM Growth Curve Analysis
3.2.1. Unconditional Growth Model
3.2.2. Conditional Growth Model
4. Discussion
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Variables | Category | N (%) |
---|---|---|
Gender | Male | 1113 (50.8) |
Female | 1080 (49.3) | |
Parent’s Education | High school graduate or less | 1005 (45.9) |
More than high school. | 1185 (54.1) |
Variables | Year 1 Mean (SD) | Year 2 Mean (SD) | Year 3 Mean (SD) |
---|---|---|---|
Life satisfaction (LS) | 2.89 (0.63) | 2.88 (0.58) | 2.90 (0.56) |
Average hours of sleep/day | 2.85 (0.68) | 2.83 (0.61) | 2.80 (0.59) |
Average hours of leisure activities/day | 7.86 (0.59) | 6.94 (1.00) | 6.75 (1.03) |
Average hours of studying/day | 5.21 (2.32) | 3.91 (2.18) | 3.63 (2.22) |
Peer relationship | 3.24 (2.18) | 2.99 (2.25) | 3.18 (2.39) |
Teacher relationship | 3.07 (0.39) | 3.11 (0.38) | 3.15 (0.36) |
Effect | Category | Linear Model | Quadratic Model |
---|---|---|---|
Coefficient SE | Coefficient SE | ||
Fixed effect | Intercept | 2.846 *** 0.014 | 2.842 *** 0.015 |
Linear slope | −0.020 ** 0.008 | 0.001 0.026 | |
Quadratic slope | −0.011 0.012 | ||
Random effect | Intercept | 0.253 *** | 0.296 *** |
Linear slope | 0.02 | 0.299 *** | |
Quadratic slope | 0.039 *** | ||
Level-I error | 0.187 | 0.16 |
Effect | Time-invariant Variables Model (Model 1) | Time-varying Variables Model | Combined Model (Model 4) | Final Model | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Time Use | Relationship | |||||||||
(Model 2) | (Model 3) | |||||||||
Coefficient | SE | Coefficient | SE | Coefficient | SE | Coefficient | SE | Coefficient | SE | |
Fixed effects | ||||||||||
For Intercept | ||||||||||
Intercept | 2.869 *** | 0.025 | 2.824 *** | 0.016 | 2.852 *** | 0.014 | 2.871 *** | 0.026 | 2.868 *** | 0.023 |
Gender | −0.132 *** | 0.028 | −0.139 *** | 0.026 | −0.124 *** | 0.02 | ||||
Parent’s ed. | 0.071 ** | 0.028 | 0.057 * | 0.027 | 0.051 + | 0.027 | ||||
sleep t. | 0.0008 ** | 0.0003 | 0.021 ** | 0.007 | 0.022 *** | 0.005 | ||||
leisure t. | 0.0002 | 0.0001 | 0.004 | 0.003 | ||||||
study t. | 0.0005 *** | 0.0001 | 0.001 | 0.008 | 0.000 | 0.002 | ||||
peer rel. | 0.485 *** | 0.052 | 0.534 *** | 0.053 | 0.525 *** | 0.04 | ||||
teacher | 0.264 *** | 0.034 | 0.240 *** | 0.034 | 0.234 *** | 0.027 | ||||
For Linear slope | ||||||||||
Intercept | 0.015 | 0.029 | 0.042 | 0.03 | −0.009 | 0.026 | 0.033 | 0.032 | 0.037 | 0.029 |
Gender | 0.004 | 0.015 | 0.015 | 0.015 | ||||||
Parent’s ed. | −0.030 * | 0.015 | −0.02 | 0.016 | −0.017 | 0.015 | ||||
sleep t. | 0.001 | 0.004 | 0 | 0.004 | ||||||
leisure t. | 0.004+ | 0.002 | 0.003 | 0.002 | 0.004 ** | 0.001 | ||||
study t. | 0 | 0.002 | 0.001 | 0.002 | ||||||
peer rel. | −0.014 | 0.03 | −0.006 | 0.031 | ||||||
teacher | −0.006 | 0.02 | −0.007 | 0.02 | ||||||
Sleep time | 0.590 * | 0.237 | 0.604 ** | 0.233 | 0.657 ** | 0.229 | ||||
Leisure time | 0.114 | 0.109 | 0.096 | 0.107 | ||||||
Study time | −0.107 | 0.118 | −0.166 | 0.116 | ||||||
Peer rel. | 0.213 *** | 0.215 *** | 0.027 | 0.213 *** | 0.027 | |||||
Teacher rel. | 0.104 *** | 0.103 *** | 0.016 | 0.101 *** | 0.016 | |||||
For Quadratic slope | ||||||||||
Intercept | −0.01 | 0.012 | −0.021 + | 0.013 | −0.011 | 0.012 | −0.02 | 0.013 | −0.020 + | 0.012 |
Random effects | ||||||||||
Intercept | 0.292 *** | 0.293 *** | 0.251 *** | 0.242 *** | 0.243 *** | |||||
Linear Slope | 0.302 *** | 0.307 *** | 0.293 *** | 0.289 *** | 0.295 *** | |||||
Quadratic slope | 0.040 *** | 0.041 *** | 0.040 *** | 0.038 *** | 0.040 *** | |||||
Level-1 error | 0.16 | 0.159 | 0.154 | 0.155 | 0.154 |
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Kim, H.; Moon, H.; Yoo, J.P.; Nam, E. How Do Time Use and Social Relationships Affect the Life Satisfaction Trajectory of Korean Adolescents? Int. J. Environ. Res. Public Health 2020, 17, 1532. https://doi.org/10.3390/ijerph17051532
Kim H, Moon H, Yoo JP, Nam E. How Do Time Use and Social Relationships Affect the Life Satisfaction Trajectory of Korean Adolescents? International Journal of Environmental Research and Public Health. 2020; 17(5):1532. https://doi.org/10.3390/ijerph17051532
Chicago/Turabian StyleKim, Hyemee, Heyjin Moon, Joan P. Yoo, and Eunji Nam. 2020. "How Do Time Use and Social Relationships Affect the Life Satisfaction Trajectory of Korean Adolescents?" International Journal of Environmental Research and Public Health 17, no. 5: 1532. https://doi.org/10.3390/ijerph17051532