A Korean language translation of the Questions About Behavior Function: Initial psychometric evaluation

•The purpose of the current study was to develop and assess the psychometric properties of the QABF-K.•The QABF-K showed good internal consistency, as well as good test–retest reliability.•The QABF-K is a sound instrument for informants whose primary language is Korean.

Identifying the function of behavior is crucial in formulating functionally-based treatment programs for people with challenging behaviors. The Questions About Behavior Function (QABF) is a well-established instrument with sound psychometric properties. The present study describes the development process for a Korean version of the QABF. The factor structure was examined in a sample of 153 QABF-K assessments, which yielded a five-factor-solution identical to the original English version. In terms of reliability, internal consistency was good with Chronbach's alpha ranging from 0.80 to 0.87 and test–retest reliability was found to be good with correlation coefficients ranging from 0.73 to 0.91. Based upon the present results, the QABF-K appears to be a promising tool for use with informants whose primary language is Korean.