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Cogn Behav Ther. 2008;37(3):183-91. doi: 10.1080/16506070802091171.

A test of the validity of the motivational interviewing treatment integrity code.

Author information

1
Department of Clinical Neuroscience, Division of Addiction Research, Karolinska Institute, Karolinska University Hospital, Stockholm, Sweden. lars.forsberg@sll.se

Abstract

To evaluate the Swedish version of the Motivational Interviewing Treatment Code (MITI), MITI coding was applied to tape-recorded counseling sessions. Construct validity was assessed using factor analysis on 120 MITI-coded sessions. Discriminant validity was assessed by comparing MITI coding of motivational interviewing (MI) sessions with information- and advice-giving sessions as well as by comparing MI-trained practitioners with untrained practitioners. A principal-axis factoring analysis yielded some evidence for MITI construct validity. MITI differentiated between practitioners with different levels of MI training as well as between MI practitioners and advice-giving counselors, thus supporting discriminant validity. MITI may be used as a training tool together with supervision to confirm and enhance MI practice in clinical settings. MITI can also serve as a tool for evaluating MI integrity in clinical research.

PMID:
18608316
DOI:
10.1080/16506070802091171
[Indexed for MEDLINE]

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