Influence of the retest artefact on outcome mesurement in psychotherapy - the Inventory of Interpersonal Problems and the Eating Disorder Inventory

被引:0
|
作者
Percevic, R [1 ]
Wolf, M [1 ]
Kordy, H [1 ]
机构
[1] Forschungsstelle Psychotherapie, D-70597 Stuttgart, Germany
关键词
effect size; reliable change; retest artifact; IIP; EDI;
D O I
暂无
中图分类号
B849 [应用心理学];
学科分类号
040203 ;
摘要
Repeated administration of self-report scales is the method of choice for observing changes over time in many fields of psychology, including psychotherapy research. However, methodological questions arise due to the problem of retest artifact. Retest data of the German versions of the Inventory of Interpersonal Problems (IIP) (N=241) and the Eating Disorder Inventory (EDI) (N=307) with four consecutive assessments were analyzed using the General Linear Model. Only the scores for the EDI-scale "drive for thinness" were found to change significant over multiple administrations. A decrease from the first to the second administration was observed. The estimated effect size was 0.13, the rate of reliable improvement 6%. A correction based on the expected change distribution and the use of a dummy test design are recommended to handle the retest artifact.
引用
收藏
页码:265 / 278
页数:14
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