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Assessment
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Short forms of the Schedule for Nonadaptive and Adaptive Personality (SNAP) for Selfand Collateral Ratings: Development, Reliability, and Validity

Elena Harlan

Lee Anna Clark

University of Iowa

Researchers and clinicians alike increasingly seek brief, reliable, and valid measures to obtain personality trait ratings from both selves and peers. We report the development of a paragraph-descriptor short form of a full-length personality assessment instrument, the Schedule for Nonadaptive and Adaptive Personality (SNAP) with both selfand other versions. Reliability and validity data were collected on a sample of 294 college students, from 90 of whom we also obtained parental ratings of their personality. Internal consistency reliability was good in both selfand parent data. The factorial structures of the self-report short and long forms were very similar. Convergence between parental ratings was moderately high. Self-parent convergence was variable, with lower agreement on scales assessing subjective distress than those assessing more observable behaviors; it also was stronger for higher order factors than for scales.

Key Words: personality assessment • short forms • collateral (peer) ratings • personality disorder • scale development

Assessment, Vol. 6, No. 2, 131-145 (1999)
DOI: 10.1177/107319119900600203
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R. E. Ready, D. Watson, and L. A. Clark
Psychiatric Patient- and Informant-Reported Personality: Predicting Concurrent and Future Behavior
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[Abstract] [PDF]