How does ACT differ from traditional CBT interventions?
Book page
ACT is part of the behavior therapy / behavior analysis / and cognitive behavior therapy tradition writ large so it would be silly to compare ACT to CBT as a whole which ACT is part of and which ACT has been influencing. “Traditional CBT-interventions” presumably means interventions organized around the idea that thoughts cause emotions and behavior. Even that subsection encompasses a broad range of things – theoretically and procedurally, so only generalizations are possible given such a question.