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Interrater Reliability of Psychopathy Checklist–Revised: Results on Multiple Analysis Levels for a Sample of Patients Undergoing Forensic Psychiatric Evaluation
Stockholm University, Faculty of Social Sciences, Department of Psychology, Perception and psychophysics.
2018 (English)In: Criminal justice and behavior, ISSN 0093-8548, E-ISSN 1552-3594, Vol. 45, no 2, p. 234-263Article in journal (Refereed) Published
Abstract [en]

Scores from the Psychopathy Checklist–Revised (PCL-R) are used to support decisions regarding personal liberty. In our study, performed in an applied forensic psychiatric setting, intraclass correlation coefficients (ICC) for absolute agreement, single rater (ICCA1) were .89 for the total score, .82 for Factor 1, .88 for Factor 2, and .78 to .86 for the four facets. These results stand in contrast to lower reliabilities found in a majority of field studies. Disagreement among raters made a low contribution (0%-5%) to variability of scores on the total score, factor, and facet level. For individual items, ICCA1 varied from .38 to .94, with >.80 for seven of the 20 items. Items 17 (“Many short-term marital relationships”) and 19 (“Revocation of conditional release”) showed very low reliabilities (.38 and .43, respectively). The importance of knowledge about factors that can affect scoring of forensic instruments (e.g., education, training, experience, motivation, raters’ personality, and quality of file data) is emphasized.

Place, publisher, year, edition, pages
2018. Vol. 45, no 2, p. 234-263
Keywords [en]
PCL-R, interrater reliability, separate interview data, generalizability theory, Swedish forensic psychiatric patients
National Category
Psychology
Research subject
Psychology
Identifiers
URN: urn:nbn:se:su:diva-151722DOI: 10.1177/0093854817747647ISI: 000419691200005OAI: oai:DiVA.org:su-151722DiVA, id: diva2:1175107
Available from: 2018-01-17 Created: 2018-01-17 Last updated: 2018-02-05Bibliographically approved

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