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http://hdl.handle.net/10071/11380
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Title: Psychometrics of the personal questionnaire: a client-generated outcome measure
Authors: Elliott, R.
Wagner, J.
Sales, C.
Rodgers, B.
Alves, P.
Café, M.
Keywords: Individualized
Measurement
Outcome
Psychometrics
Psychotherapy
Issue Date: 2016
Publisher: American Psychological Association
Abstract: We present a range of evidence for the reliability and validity of data generated by the Personal Questionnaire (PQ), a client-generated individualized outcome measure, using 5 data sets from 3 countries. Overall pretherapy mean internal consistency (alpha) across clients was .80, and within-client alphas averaged .77; clients typically had 1 or 2 items that did not vary with the other items. Analyses of temporal structure indicated high levels of between-clients variance (58%), moderate pretherapy test-retest correlation (r = .57), and high session-to-session Lag-1 autocorrelation (. 82). Scores on the PQ provided clear evidence of convergence with a range of outcome measures (within-client r = .41). Mean pre-post effects were large (d = 1.25). The results support a revised caseness cutoff of 3.25 and a reliable change index interval of 1.67. We conclude that PQ data meet criteria for evidence-based, norm-referenced measurement of client psychological distress for supporting psychotherapy practice and research.
Peer reviewed: yes
URI: http://hdl.handle.net/10071/11380
DOI: 10.1037/pas0000174
ISSN: 1040-3590
Ciência-IUL: https://ciencia.iscte-iul.pt/id/ci-pub-27820
Accession number: WOS:000371078800005
Appears in Collections:CIS-RI - Artigos em revistas científicas internacionais com arbitragem científica

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