BACKGROUND: Social self-concept is a foundational construct in the healthy development of early adolescent girls; however, few gender-specific social self-concept interventions exist to support adolescent girls' development. OBJECTIVES: The overarching goal of the dissertation was to enhance the design, delivery, and evaluation of the Growing Girls Program. To achieve this, three distinct yet complimentary aims were established, to: (1) identify best practices in existing social self-concept interventions, (2) evaluate the effect of the current Growing Girls Program on early adolescent girls' social self-concept, and (3) identify gender-specific messages that early adolescent girls interpret from print media. METHODS: The dissertation employs a mixed-methods design, integrating findings from a systematic review of social self-concept interventions, content analysis of parent focus groups (n=4) and interviews (n=11), quantitative analysis of participant questionnaires (n=40) and visual content analysis of adolescent created collages (n=20). RESULTS: The results by specific aim illustrated: 1) the value of interventions that are: implemented in the school setting, developmentally and culturally appropriate, informed by theory, led by well-trained and supported facilitators, and implemented for 12 weeks to 6 months in duration, 2) that the evaluation of the Growing Girls Program provided promising evidence for its future implementation; and 3) that early adolescent girls perceived media messages to promote the importance of physical beauty, sex-appeal, cosmetic use, confidence, designer brands, perfect bodies and health. CONCLUSIONS: This study contributes to the improvement of the Growing Girls Program, and thereby to the practice of promoting early adolescent girls' social self-concept. Findings illustrate the lack of interventions focused on social self-concept and the challenges of adequately conceptualizing and measuring the construct. Therefore, the enhancement of the gender-specific Growing Girls Program fills an important gap in the social self-concept development literature. RECOMMENDATIONS: The Growing Girls Program should retain current practices assumed to be associated with its success, including its developmentally appropriate, gender specific, 22-week curriculum, its school-based setting, its use of trained and well-supported program facilitators, and it fidelity tracking. To improve, the program should 1) add lessons on the subjects of physical beauty, sex appeal, and the need to appear confident, 2) reduce levels of attrition, and 3) enhance its evaluation practices by including a comparison group, utilizing alternative self-report social self-concept measures, and including a follow up post-intervention.

Background: DISA (Depressive Symptoms In Swedish Adolescents) is a cognitive behavioral intervention aimed at preventing stress and depressive symptoms in adolescents. It is frequently used in Swedish schools for students aged 13-15 years. DISA is commonly offered to females, but at some schools, the intervention is also offered to males. In this study, the application of the intervention for both females and males is evaluated. Aim: The overarching aim of this thesis was to explore the experience, significance, and effectiveness of the school-based intervention DISA. The specific aims were to investigate the effectiveness of depressive symptoms and self-reporting health, and costs and cost-effectiveness as well as to elucidate the experiences of adolescents and tutors. Methods: The effectiveness of DISA was investigated using method triangulation. The thesis is based on two quantitative and two qualitative studies. The quantitative studies were quasi-experimental trials with an intervention group (I, IV), and a control group (IV), with follow-up measurements obtained at 3 and 12 months after baseline. The qualitative studies were based on focus group interviews with adolescents (II) and tutors (III). The school-based cognitive behavioral prevention program DISA was presented by school health staff and teachers once per week for ten weeks. Students in grade 8 (median age: 14) participated in the intervention in study I (n=62, 52% females) and study IV (n=462, 79% females), and 486 students (46% females) were allocated to the control group (IV). Focus group interviews were conducted with 89 adolescents (II) and 22 tutors (III). The interviews were analyzed with qualitative content analysis. Findings: The intervention group decreased their self-reported depressive symptoms and improved their self-rated health more than the control group (p<0.05) at the 12-month follow-up. The majority of the adolescents rated the cognitive behavioral program as a positive experience, and the attendance rate was high. The incremental cost-effectiveness ratio was approximately USD 6,300 per quality-adjusted life year (QALY). The focus group interviews with the adolescents revealed that the students found that they developed intrapersonal strategies through DISA, such as directed thinking, improved self-confidence, stress management, and positive activities. They also gained an increased interpersonal awareness regarding trusting the group and considering others. However, structural constraints of the DISA program, such as negative framing and an emphasis on performance, were also noted. The focus group interviews with the tutors identified an overall theme of striking a balance between strictly following the manual and meeting student needs. Conclusions: The DISA program appears to be a feasible, cost-effective school-based cognitive behavioral program with high levels of student adherence and satisfaction, as well as positive mental health benefits. However, a desire for a more health-promoting approach was expressed.

Cette étude vise à évaluer les éléments facilitants et les barrières à l’implantation du programme d’éducation à la nutrition Camille, Antoine et l’archipel Ôlait, développé par les Producteurs laitiers du Canada (PLC), auprès d’enseignants du préscolaire provenant de six régions du Québec et ayant reçu un atelier de formation animé par une diététiste des PLC. Elle vise également à connaître le degré d’implantation et la fidélité du programme ainsi que son appréciation, son utilisation et sa pertinence. Après une moyenne de 5 mois d’implantation, un questionnaire auto-administré a été complété par 37 enseignants (N = 86, 43 %), dont 10 utilisateurs (27 %) et 27 non-utilisateurs (73 %). Puis, des groupes de discussion ont eu lieu avec 13 enseignants (N = 170, 8 %). En moyenne, 11,4 activités sur 30 ont été réalisées (38 %), dont 6,3 telles quelles (55 %) et 5,1 modifiées (45 %), et les enseignants ont rapporté avoir l’intention de refaire 6,1 activités (54 %). L’implantation du programme a été facilitée ou limitée par différentes caractéristiques des enseignants, par l’appréciation de son contenu et son format, par sa pertinence concernant les exigences pédagogiques au préscolaire, la réalité des élèves et des parents et les objectifs d’apprentissages en nutrition, par le milieu scolaire, familial et communautaire ainsi que par la crédibilité et le support des PLC. Plusieurs de ces facteurs sont à la fois des éléments facilitants et des barrières. Les résultats obtenus aideront à ajuster ce programme et guider le développement et l’évaluation de programmes similaires. / This study aims to assess the facilitating conditions and barriers to the implementation of Camille, Antoine et l’archipel Ôlait nutrition education program, develop by the Dairy Farmers of Canada (DFC), with preschool teachers, from six regions of Québec, who assisted a workshop delivered by a dietitian from DFC. It also seeks to know the degree of implementation and fidelity of the program and its assessment, its use and relevance. Following an average of five months of implementation, a self-administered questionnaire was completed by 37 teachers (N = 86, 43 %), 10 users (27 %) and 27 non-users (73 %). Then, focus groups were held with 13 teachers (N = 170, 8 %). On average, 11.4 out of 30 activities have been carried out (38 %), including 6.3 as planned (55 %) and 5.1 modified (45 %), and teachers reported that it intends to repeat 6.1 activities (54 %). Implementation of the program was facilitated or limited by various characteristics of teachers, the assessment of its content and its format, its relevance to the educational requirements for preschool, the reality of pupils and their parents and objectives in nutrition learning, at school, in their family and community as well as the credibility and support of the DFC. Many of those factors are both facilitating conditions and barriers. The results will help to adjust the program and guide the development and evaluation of similar programs.

Cette étude vise à évaluer les éléments facilitants et les barrières à l’implantation du programme d’éducation à la nutrition Camille, Antoine et l’archipel Ôlait, développé par les Producteurs laitiers du Canada (PLC), auprès d’enseignants du préscolaire provenant de six régions du Québec et ayant reçu un atelier de formation animé par une diététiste des PLC. Elle vise également à connaître le degré d’implantation et la fidélité du programme ainsi que son appréciation, son utilisation et sa pertinence. Après une moyenne de 5 mois d’implantation, un questionnaire auto-administré a été complété par 37 enseignants (N = 86, 43 %), dont 10 utilisateurs (27 %) et 27 non-utilisateurs (73 %). Puis, des groupes de discussion ont eu lieu avec 13 enseignants (N = 170, 8 %). En moyenne, 11,4 activités sur 30 ont été réalisées (38 %), dont 6,3 telles quelles (55 %) et 5,1 modifiées (45 %), et les enseignants ont rapporté avoir l’intention de refaire 6,1 activités (54 %). L’implantation du programme a été facilitée ou limitée par différentes caractéristiques des enseignants, par l’appréciation de son contenu et son format, par sa pertinence concernant les exigences pédagogiques au préscolaire, la réalité des élèves et des parents et les objectifs d’apprentissages en nutrition, par le milieu scolaire, familial et communautaire ainsi que par la crédibilité et le support des PLC. Plusieurs de ces facteurs sont à la fois des éléments facilitants et des barrières. Les résultats obtenus aideront à ajuster ce programme et guider le développement et l’évaluation de programmes similaires. / This study aims to assess the facilitating conditions and barriers to the implementation of Camille, Antoine et l’archipel Ôlait nutrition education program, develop by the Dairy Farmers of Canada (DFC), with preschool teachers, from six regions of Québec, who assisted a workshop delivered by a dietitian from DFC. It also seeks to know the degree of implementation and fidelity of the program and its assessment, its use and relevance. Following an average of five months of implementation, a self-administered questionnaire was completed by 37 teachers (N = 86, 43 %), 10 users (27 %) and 27 non-users (73 %). Then, focus groups were held with 13 teachers (N = 170, 8 %). On average, 11.4 out of 30 activities have been carried out (38 %), including 6.3 as planned (55 %) and 5.1 modified (45 %), and teachers reported that it intends to repeat 6.1 activities (54 %). Implementation of the program was facilitated or limited by various characteristics of teachers, the assessment of its content and its format, its relevance to the educational requirements for preschool, the reality of pupils and their parents and objectives in nutrition learning, at school, in their family and community as well as the credibility and support of the DFC. Many of those factors are both facilitating conditions and barriers. The results will help to adjust the program and guide the development and evaluation of similar programs.