ACT vs Dual Process Model of Grief

ACT

Tradition

Cognitive-Behavioral

Founder

Steven Hayes (1999)

Evidence

Guideline-recommended

Focus

Experiential + Skill

Format

Individual + Group

Duration

Short-medium

Dual Process Model of Grief

Tradition

Integrative

Founder

Margaret Stroebe & Henk Schut (1999)

Evidence

RCT-supported

Focus

Grief + Adaptive

Format

Individual, group

Duration

Variable

ACT

Core mechanism: Psychological flexibility through acceptance, defusion, present-moment awareness, values clarification, and committed action

Ontology: Psychological inflexibility: cognitive fusion and experiential avoidance narrow behavioral repertoire

Dual Process Model of Grief

Core mechanism: Healthy adaptation requires dynamic oscillation between loss-oriented coping (processing grief) and restoration-oriented coping (rebuilding life); rigid fixation in either mode produces complications

Ontology: Grief is not a state to move through but a dynamic oscillation between confronting loss and rebuilding life; pathology emerges from rigidity, not from the pain itself

Only ACT

Only Dual Process Model of Grief

ACT

Philosophical roots: Pragmatism (James, Dewey — truth as workability); functional contextualism (Pepper); Buddhism (attachment as suffering, mindfulness); Skinner (radical behaviorism, reframed)

Blind spots: Acceptance framing can feel dismissive of legitimate suffering; metaphor-heavy approach may not land for all clients

Therapeutic voice: What if the goal isn't to get rid of the anxiety, but to take it with you toward what matters?

Dual Process Model of Grief

Philosophical roots: Lazarus & Folkman (coping as process); Bowlby (attachment and loss); Worden (task model as precursor); regulatory flexibility research (Bonanno); gender role socialization and grief

Blind spots: Descriptive rather than prescriptive — tells clinicians what healthy grief looks like but less guidance on what to do when someone is stuck; cultural assumptions about individual coping may not map to collective grief practices

Therapeutic voice: Some days you need to sit with the grief. Other days you need to do your taxes and clean the kitchen. Both are grief work. The back and forth isn't a sign you're doing it wrong — it's exactly how this works.