Further Evaluation of the Psychometric Properties of the Acceptance and Action Questionnaire-II

Autor/inn/en	Fledderus, Martine; Oude Voshaar, Martijn A. H.; ten Klooster, Peter M.; Bohlmeijer, Ernst T.
Titel	Further Evaluation of the Psychometric Properties of the Acceptance and Action Questionnaire-II
Quelle	In: Psychological Assessment, 24 (2012) 4, S.925-936 (12 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1040-3590
DOI	10.1037/a0028200
Schlagwörter	Validity; Item Response Theory; Questionnaires; Anxiety; Depression (Psychology); Psychometrics; Construct Validity; Measures (Individuals); Therapy; Adults; Intervention; Reliability; Age Differences; Mental Health + Suchen Sie Ihr Suchwort? Gültigkeit; Item-Response-Theorie; Fragebogen; Angst; Psychometry; Psychometrie; Messdaten; Therapie; Reliabilität; Age; Difference; Age difference; Altersunterschied; Psychohygiene
Abstract	The Acceptance and Action Questionnaire-II (AAQ-II) is a self-report measure designed to assess experiential avoidance as conceptualized in acceptance and commitment therapy (ACT). The current study is the first to evaluate the psychometric properties of the AAQ-II in a large sample of adults (N = 376) with mild to moderate levels of depression and anxiety who participated in a study on the effects of an ACT intervention. The internal construct validity and local measurement precision were investigated by fitting the data to a unidimensional item response theory (IRT) model, and the incremental validity of the AAQ-II beyond mindfulness, as measured by the Five Facet Mindfulness Questionnaire, was assessed. Results of the IRT analyses suggest that the AAQ-II is a unidimensional measure of experiential avoidance and has satisfactory reliability for group comparisons in mild to moderately depressed and anxious populations. Item functioning was found to be independent of gender and slightly dependent on age in this sample. Furthermore, the AAQ-II showed incremental validity beyond 5 mindfulness facets in explaining depression, anxiety, and positive mental health. This study suggests the AAQ-II shows promise as a useful tool for the measurement of experiential avoidance in mild to moderately depressed and anxious populations. (Contains 6 tables and 1 figure.) (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10