Although different methods are available for the analyses of longitudinal data, analyses based on generalized linear models (GLM) are criticized as violating the assumption of independence of observations. Alternatively, linear mixed models (LMM) are commonly used to understand changes in human behavior over time. In this paper, the basic concepts surrounding LMM (or hierarchical linear models) are outlined. Although SPSS is a statistical analyses package commonly used by researchers, documentation on LMM procedures in SPSS is not thorough or user friendly. With reference to this limitation, the related procedures for performing analyses based on LMM in SPSS are described. To demonstrate the application of LMM analyses in SPSS, findings based on six waves of data collected in the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programmes) in Hong Kong are presented.

Objective: This paper examines the dimensionality and factorial invariance of the Chinese Family Assessment Instrument (C-FAI) using multigroup confirmatory factor analyses (MCFAs). Method: A total of 3,649 students responded to the C-FAI in a community survey. Results: Results showed that there are five dimensions of the C-FAI (communication, mutuality, conflict and harmony, parental concern, parental control), which are subsumed under two higher order factors (family interaction and parenting). Evidence of factorial invariance in terms of configuration, first-order factor loadings, second-order factor loadings, intercepts of measured variable, and intercepts of first-order latent factor, was found. Conclusions: The C-FAI is an objective measure of Chinese family functioning with high factorial validity. It can be used in family practice contexts of Chinese families.

Project “P.A.T.H.S.” has been shown to be effective in promoting positive development outcomes among Chinese adolescents in the school context. However, little is known whether the benefits can also be found in other settings. The purposes of the study was to investigate the changes in psychosocial outcomes among Hong Kong Chinese adolescents after participating in a community-based positive youth development (PYD) program. Using a one-group pretest-posttest design, junior high school students (N = 17,544) were invited to join the universal prevention program (the Tier 1 Program) and/or the selective prevention program (the Tier 2 Program). 10,807 students whose pre-and post-test data were successfully matched. The students responded to validated outcome measures assessing PYD outcomes, life satisfaction and thriving at pretest and posttest. Consistent with the hypotheses, students showed positive change on different developmental outcomes after joining the program. Amongst the different programs, students in the Tier 2 Program had significant improvement in all developmental outcome indicators. While limitations of the one-group pretest-posttest design and the alternative explanations are duly acknowledged, the present study suggests that the community-based Project P.A.T.H.S. is a promising approach to promote positive youth development, life satisfaction and thriving of adolescents, a conclusion which is consistent with the existing evaluation findings of the project. Building from previous school-based research, the present study extends the literature by showing the effectiveness of a positive youth prevention program in a community context. Limitations of the study design (e.g., an absence of a control group) are discussed.

While literature has displayed a link between psychological well-being (i.e. depression, hopelessness, and life satisfaction) and health-risk behaviors (i.e. smoking, drinking, suicide, and physical inactivity), the mechanisms underlying this relationship have received little empirical attention. This study examines the mediation effects of social support (from family, friends, and significant others) that accounted for the link. Participants were 2023 university students (47.7% male). Structural equation modeling showed partial mediation effect of social support between psychological well-being and health-risk behaviors. In particular, social support from family and friends jointly mediated about 80 percent of the effect of life satisfaction and hopelessness on drinking. These results offered novel evidence that helps improve theorizing the mechanisms of the relationship between psychological well-being and health-risk behaviors. They also highlighted the potential benefits of social support for university students to help them stay healthy. The implications of these results are discussed.

The Tier 1 Program of the Project P.A.T.H.S. (Positive Adolescent Training through Holistic Social Programs) is a positive youth development program implemented in school settings utilizing a curricular-based approach. In the third year of the Full Implementation Phase, 19 experimental schools (n = 3,006 students) and 24 control schools (n = 3,727 students) participated in a randomized group trial. Analyses based on linear mixed models via SPSS showed that participants in the experimental schools displayed better positive youth development than did participants in the control schools based on different indicators derived from the Chinese Positive Youth Development Scale, including positive self-identity, prosocial behavior, and general positive youth development attributes. Differences between experimental and control participants were also found when students who joined the Tier 1 Program and perceived the program to be beneficial were employed as participants of the experimental schools. The present findings strongly suggest that the Project P.A.T.H.S. is making an important positive impact for junior secondary school students in Hong Kong.