Portuguese historiography has mostly adopted a pessimistic view regarding the contribution of the railways to the development of country. Yet, railway access helped to increase population concentration and economic development, favoring migration into towns, the growth of pre-existing urban centers, and the emergence of new centers. But railways tended to be more beneficial to regions that were already prosperous and to aggravate the conditions unfavorable to development in areas with greater structural weaknesses.

Background: Several quantitative studies support the effectiveness of the Dialectical Behavior Therapy (DBT) psychosocial skills training group component for adolescents with impulse-control disorder and/or emotional dysregulation. However, qualitative research to assess this psychotherapeutic tool in the adolescent population is sparse. This study aims to examine the subjective experience of adolescents with behavioral issues who have completed DBT skills training group, as well as using this experience to extract hypotheses regarding its usefulness which can then be verified at a later time by means of quantitative instruments. Methods: We developed a qualitative study by using focus groups with adolescents (N = 20) whose diagnosis includes symptoms such as behavior disorder, impulse-control disorder and/or emotional dysregulation, and good informants, who have completed DBT skills training. Three focus groups were created. Results: The subjective experience of adolescents who have completed a DBT skills training group is collected in four main categories: experience of illness, motivation for therapy, experience of therapy and results of the therapy. Conclusions: Adolescents with behavioral problems assess their participation in the DBT skills training group positively, even recommending its usefulness to healthy population. Beyond learning skills, they emphasize the intrapsychic changes (as improvement in reflective activity) that they objectify after the group experience.

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