Day MA, et al. - The construct validity of the 4 Pain-related Cognitive Processes Questionnaire (PCPQ) composite scales, was examined. On 8 orthogonal reference-variable factors that captured the common variance in 17 pain-related measures, PCPQ scales were regressed. Findings revealed the associations in the exploratory structural equation modeling approach, as well as the PCPQ scale content and intercorrelations, supporting the validity of the PCPQ Pain Diversion, Pain Distancing, and Pain Focus scales. The construct validity of the Pain Openness scale requires further investigation as strong associations with the validity criteria assessed in this study were lacking.