“…These preference assessment variations may have implications for the accuracy of outcomes obtained, the feasibility of conducting such a preference assessment due to resource constraints (Graff & Karsten, ), and the skills that must be present in an individual's repertoire for the assessment to be the most appropriate and useful. For example, for individuals who have sufficient conditional discrimination skills, it may be unnecessary to use additional resources (e.g., time, materials) to conduct the assessment with people (e.g., Clay et al, ) or to construct videos of social interaction (e.g., Wolfe et al, ) when a picture‐based preference assessment may be just as accurate (e.g., Kelly et al, ; Morris & Vollmer, ). Similarly, for an individual with a less developed conditional discrimination repertoire, it may be efficacious to conduct a preference assessment with more frequent or extended exposure to the contingencies of selection (e.g., Lang et al, ; Morris & Vollmer, ), instead of a more efficient assessment (e.g., Kelly et al, ), as it may result in a more accurate, and therefore useful, hierarchy.…”