Elliott, R;
Wagner, J;
Sales, CMD;
Rodgers, B;
Alves, P;
Cafe, MJ;
(2016)
Psychometrics of the Personal Questionnaire: A Client-Generated Outcome Measure.
Psychological Assessment
, 28
(3)
pp. 263-278.
10.1037/pas0000174.
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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.
| Type: | Article |
|---|---|
| Title: | Psychometrics of the Personal Questionnaire: A Client-Generated Outcome Measure |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1037/pas0000174 |
| Publisher version: | http://dx.doi.org/10.1037/pas0000174 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Social Sciences, Psychology, Clinical, Psychology, outcome, measurement, individualized, psychometrics, psychotherapy, CASE EFFICACY DESIGN, CORE-OM, EXPERIENTIAL PSYCHOTHERAPY, INTERPERSONAL PROBLEMS, THERAPY, PATIENT, DEPRESSION, INVENTORY, PROGRAMS, VALIDITY |
| UCL classification: | UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10047298 |
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