It presents a summary of the fundamental aspects of the three generations of behavioral therapy. Third generation therapy is highlighted, the role of behavioral functions in their context (especially language). It raises the empirical foundations and applications of the Group Contextual Therapies based on its effectiveness and efficiency usually in public services of psychological attention. The main work focuses on Group Acceptance and Commitment Therapy and in reference to "realizing" or discriminating as a way of deriving responses to meaningful actions with meaning in people's lives and finally summarized our experience of how we work with Acceptance and Commitment Therapy Group to anxiety-depressive problems in our context of public mental health care.

Se presenta un resumen de las tres generaciones de la terapia de conducta, destacando en la tercera el papel de las funciones de la conducta en su contexto (especialmente del lenguaje). Se plantea los fundamentos de las Terapias Contextuales Grupales en base a su eficacia y eficiencia habitualmente en servicios públicos de atención psicológica. Se describe los focos de trabajo fundamentales de la Terapia de Aceptación y Compromiso de Grupo en referencia a discriminar como forma de derivar respuestas hacia acciones valiosas con sentido en la vida de las personas y por último se presenta de manera resumida nuestra experiencia de trabajo con la Terapia de Aceptación y Compromiso de Grupo con problemas ansiosos-depresivos en nuestro contexto de atención de salud mental pública.

We present two modalities of third generation contextual therapies in their group therapy format applied to groups of people with diverse transdiagnostic problems in a public context of attention to mental health. In both groups of therapies an intervention design of 12 sessions with experiential exercises during 3 months is used. The results of this study indicate that both group modalities are effective in reducing experiential avoidance along with other aspects, a reduction that does not occur when the results are compared with those in the individual therapy control group. The results propose a promising path for the application of group contextual therapies in public contexts.

We present two modalities of third generation contextual therapies in their group therapy format applied to groups of people with diverse transdiagnostic problems in a public context of attention to mental health. In both groups of therapies an intervention design of 12 sessions with experiential exercises during 3 months is used. The results of this study indicate that both group modalities are effective in reducing experiential avoidance along with other aspects, a reduction that does not occur when the results are compared with those in the individual therapy control group. The results propose a promising path for the application of group contextual therapies in public contexts.