The study is a group randomized controlled trial. High school classes were allocated by randomization to the intervention or control group by a Randomization function in Excel computer program. Outcomes were measured by questionnaire at pre-intervention, post-intervention and 3-month follow-up. The study protocol was approved by Tel Hai College institutional review board. Parents of all participants, in the intervention and in the control group, shall receive information about the program and the study and shall be asked to provide informed consent.~Participants and setting: A high school in the northern region of Israel was recruited for the study. 9th and 10th grade classes were chosen to participate in the study, all mixed gender classes. All data will be collected within the school setting.~Program description: In Favor of a Resilient Self is an interactive, cognitive behavior program aiming to address low resilience, low self-esteem and body dissatisfaction. This program is part of a series of intervention programs named In Favor of Myself which has been in development since 2008. This resilience-based program contains a range of coping strategies to help adolescents improve resilience, self-esteem and body image. The program consists of nine 90-min sessions delivered by one group leader in the presence of the classes' teachers. Participants in the control group shall receive one session of 90 minutes of health nutrition education.
The study is a group randomized controlled trial. High school classes were allocated by randomization to the intervention or control group by a Randomization function in Excel computer program. Outcomes were measured by questionnaire at pre-intervention, post-intervention and 3-months follow-up. The study protocol was approved by Tel Hai College institutional review board. Parents of all participants, in the intervention and in the control group, received information about the program and the study and were asked to provide informed consent.