ACT, DBT, MBCT, and REBT

Acceptance and commitment therapy

ACT emphasizes psychological flexibility: responding to difficult experiences while acting in line with chosen values. Acceptance and mindful attention accompany behaviour change rather than functioning as promises to remove all distress (Association for Contextual Behavioral Science, n.d.). A foundational meta-analysis reported advantages over several control conditions but did not establish superiority to established CBT (A-Tjak et al., 2015). This older synthesis is included to explain the distinction, not to provide an exhaustive current review of ACT. Nonsignificance in a superiority comparison should not be reworded as proven equivalence.

Sources: A-Tjak et al., 2015; Association for Contextual Behavioral Science, n.d.

Dialectical behaviour therapy

Comprehensive outpatient DBT includes individual therapy, skills training, between-session coaching, and a therapist consultation team. Its skills concern mindfulness, distress tolerance, emotion regulation, and interpersonal effectiveness (Behavioral Tech Institute, n.d.). A Cochrane review of borderline personality disorder found some favourable DBT results against usual care, but characterized the relevant evidence as low quality (Storebø et al., 2020). A self-help lesson borrowing a DBT skill should therefore be called a DBT-informed skill, not comprehensive DBT or a demonstrated substitute for care.

Sources: Storebø et al., 2020; Behavioral Tech Institute, n.d.

Mindfulness and relapse prevention

Mindfulness-based cognitive therapy combines a structured mindfulness programme with cognitive-therapy elements. A patient-level meta-analysis addressed relapse prevention in adults with recurrent depression who were in full or partial remission, rather than generic stress relief or acute treatment for everyone (Kuyken et al., 2016). That population and outcome should accompany any reference to its results. Evidence for a complete MBCT course cannot be assigned to a brief meditation, a breathing reminder, or an app’s general mindfulness content.

Sources: Kuyken et al., 2016

Rational emotive behaviour therapy

REBT gives particular attention to rigid beliefs and demands and the emotional and behavioural consequences associated with them. David et al. (2018) synthesized a varied literature and found average benefits, while identifying limitations that require further study. The mixture of settings, comparators, and outcomes makes its pooled result unsuitable as a universal treatment ranking. For Ella, a discussion of flexible expectations can be described as REBT-informed; it does not establish delivery of a full REBT protocol or a clinically validated intervention.

Sources: David et al., 2018; Umbrella Journal, 2026a

Why the distinctions matter

The useful question is which intervention, for whom, compared with what, and on which outcome. A named therapeutic programme has defining components and a particular evidence base. A reflective app feature can borrow a technique without delivering that whole programme. This section maps the boundaries among related approaches; it is not four comprehensive efficacy reviews. Research on the parent approach and direct evaluation of a specific app remain separate.