Development and psychometric evaluation of an instrument to assess reinforcer preferences: the preferred items and experiences questionnaire.

The Preferred Items and Experiences Questionnaire (PIEQ) is a new instrument to assess reinforcer preferences in adolescents and adults. Research was conducted with college and high school students to develop the PIEQ, to examine its reliability with test-retest and internal consistency methods, and to test its validity. This research provides support for the PIEQ's reliability and validity.