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The mentalization-based therapy adherence and quality scale (MBT-AQS): Reliability in a clinical setting

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Abstract
The Mentalization-Based Treatment Adherence and Quality Scale (MBT-AQS) is a 17-item measure
of treatment adherence and quality of individual mentalization-based therapy (MBT). Until now,
reliability research on the scale has primarily been conducted by highly experienced raters from
the Norwegian MBT Quality Lab who were part of its development. Hence, it can be questioned
whether only experts in research settings can achieve satisfying levels of reliability on the scale.
In this study, we investigated whether a satisfying level of reliability on the MBT-AQS could be
obtained by experienced MBT therapists in a clinical setting following a brief one-day training
course. The overall reliabilities for six raters were good for adherence (.67) and for quality (.62).
Thus, the MBT-AQS was found to be an appropriate MBT adherence rating instrument with clinical
and educational utility outside of the Norwegian MBT Quality Lab. However, ambiguity of
some constructs, low frequency of certain item ratings and low levels of MBT quality challenge
reliability. This is discussed in the context of utilizing the scale for clinical and supervising purposes
Keywords: treatment integrity, adherence, quality, assessment, mentalization-based treatment, MBT
Original languageEnglish
JournalNordic Psychology
Pages (from-to)1-12
ISSN1901-2276
DOIs
Publication statusPublished - 2018

ID: 56499748