Numerous theoretical frameworks argue that engaging in controlled cognitive processing of artwork is an important aspect of the aesthetic experience. However, most research on controlled processing has examined controlled processing based on situational factors that can be experimentally manipulated. While this is a valuable endeavor, it does not capture important differences that naturally exist between art viewers. To rectify this, the current study developed a measure of individual differences in controlled processing within aesthetics, the Aesthetic Processing Preference Scale (APPS). The APPS was constructed along three dimensions of controlled processing in aesthetic experience: Appreciation for Complexity in art, Intolerance for Ambiguity in art, and the Propensity to Contextualize artworks. In two studies, participants completed the APPS as well as convergent and divergent validity measures. Across both studies, the APPS was found to be a reliable and valid measure of controlled processing. The utility of the APPS to future researchers and educators is in accounting for the reasons that someone is likely to engage in controlled processing, providing further insight into human motivation.