This article aimed to provide a systematic narrative synthesis of existing studies on the mediators of change in psychotherapy with adolescents (10–19 years) and transition age youth (TAY) (20–29 years) who have experienced trauma-related symptoms or posttraumatic disorder. Additionally, we were interested in identifying psychotherapy-, trauma type-, and clients’ age- and gender-specific mediators of treatment outcome. Following the preferred reporting items for systematic reviews and meta-analyses, a total of 3,723 studies published in PubMed and PsycINFO databases were screened against inclusion criteria, revealing 15 eligible studies. No studies with only TAY were found; therefore, all results were limited to therapy with adolescents. Cognitive mediators were tested in 66% of selected studies, followed by parents/family-related, mental-health-related, therapy-related, and behavioral mediators. Moderate evidence was found for posttraumatic cognitions, whereas therapeutic alliance seemed to be a promising candidate for future research. Striking absence of non-cognitive-behavioral therapy interventions, emotional and adolescent-specific mediators, as well as studies with males and in non-Western societies was evident. Future original studies would benefit from applying methodological rigor in respect to mediation testing.

Although there is a growing interest in the concept of sense of personal agency in adolescence and young adulthood, its operationalization and assessment have been inconsistent. We propose and test a preliminary assessment model of sense of agency combining four of the most relevant indicators suggested by the literature for its assessment (setting goals, optimism, decision-making, and self-efficacy). We conducted three independent studies with young adults [study 1 = 692; study 2 = 410] and adolescents [study 3 = 481] to analyze its psychometric properties. The CFA results revealed a good fit to the data in all three studies. The results of studies 1 and 2 indicate that even though the four dimensions share a significant proportion of variance, they do not assess the overlapping aspects of sense of agency. The findings of study 1 clarified that the proposed measurement model is invariant across sex and different levels of psychosocial risk. The results of study 2 suggest that, as expected, the latent construct of sense of agency is linked to different dimensions of psycho-emotional adjustment of young adults. Lastly, the findings of study 3 revealed that our preliminary model is invariant across three assessment points establishing the measurement longitudinal invariance.

The current study examined the stability/change trajectories of sense of agency across high school, analyzing whether these trajectories are influenced by attachment to parents over time, as well as adolescent’s sex, psychosocial risk in baseline, and pandemic stress. The sample includes 467 Portuguese adolescents (59.3% were females; Mage = 15.58 years, SD = .80), who were evaluated three times across 18 months. This work yielded three major findings. First, we found that adolescents’ sense of agency significantly increased over time, with significant inter-subject variance at the initial levels, but not at the growth rate. Second, we observed a stable effect of attachment to parents on sense of agency across late adolescence. Further, we found differential effects of attachment to father versus mother on agency beliefs. Third, we verified that boys reported a greater growth of sense of agency than girls; that adolescents who experienced higher levels of multiple risks in T1 showed lower initial levels of sense of agency; and that adolescents who reported higher levels of pandemic-related stress reported less growth of sense of agency. These findings emphasize the role of individual and family characteristics, as well as the role of the wider social context in shaping the development of sense of agency during adolescence. Moreover, the findings underline the need to consider differential influences in the relationship with fathers versus mothers to gain a better understanding of changes in agency beliefs.

This study focuses on emerging adults’ personal agency, an individual feature associated with enhanced adaptive and resilient developmental trajectories. The two objectives were to explore the role of demographic, psychosocial risk, and relational factors in predicting personal agency and analyze whether romantic attachment mediates the connection between parental attachment and personal agency. The sample consisted of 607 Portuguese emerging adults aged between 18 and 30 years. Structural equation modeling results suggest that men are more likely to exhibit higher levels of personal agency than women. Trustful romantic relations and good paternal emotional bonds are associated with greater personal agency, while dependent romantic relations and maternal relations, characterized by inhibition of exploration, are associated with lower personal agency. Moreover, in romantic relations, trust, unlike dependence, partially mediates the association between parental attachment and personal agency. These findings are discussed based on attachment and self-determination theories, considering the importance of secure relationships for agency and autonomy in personal actions. This study provides important evidence for the influencers and mediators of personal agency, contributing to a better understanding of this individual capacity.