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Few studies have examined the psychometric properties and invariance of scales measuring constructs relevant to colorectal cancer screening (CRCS). We sought to: (i) evaluate the factorial validity of four core constructs associated with CRCS (benefits, barriers, self-efficacy, and optimism); and (ii) examine measurement invariance by screening status (currently screened, overdue, never screened).

Factorial Validity and Invariance of Four Psychosocial Constructs of Colorectal Cancer Screening: Does Screening Experience Matter?