This study explores the construct validity of intrinsic sources of personal (ISPR), an intra-individual source of (felt) involvement. Data relative to the internal consistency and the convergent, discriminant, and nomological validity of ISPR were generated in an experiment and tested using a structural equation methodology. Measures of ISPR were shown to achieve internal consistency and convergent validity, as well as discriminant validity with respect to measures of subjects' domain knowledge. Evidence for the nomological validity of ISPR was obtained by examining the relationships between three theoretically related constructs-ISPR, domain knowledge, and felt involvement.
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