Three studies evaluated psychometric properties of
the Dutch version of the 9-item Acceptance and Action
Questionnaire (AAQ)—a self-report measure designed to
assess experiential avoidance as conceptualized inAcceptance
and Commitment Therapy (ACT). Study 1, among bereaved
adults, showed that a one-factor model, with AAQ-items
constituting a single dimension of experiential avoidance,
fitted the data well. The internal consistency and temporal
stability of the AAQ were satisfactory. In Study 2, among
undergraduate students, and Study 3, among 60 outpatients,
higher AAQ scores were found to be significantly associated
with psychopathology, maladaptive coping strategies, and
neuroticism, attesting to the validity of themeasure. In support
of its incremental validity, Study 3 showed that the AAQ
remained significantly associated with depression and anxiety
after controlling for neuroticism and thought suppression. The
current studies complement prior research supporting the
psychometric properties of the AAQ and the ACT conceptualization
of experiential avoidance
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