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Psychometric evaluation of the interpersonal relationship inventory for early adolescents.

The purposes of this methodological study were to factor analyze the short form of the Tilden Interpersonal Relationship Inventory (IPRI) for early adolescents, and to assess construct validity of the social support and conflict subscales with early adolescents. The sample consisted of 147 early adolescents, aged 12-14, who completed instrument packets in classrooms in a suburban middle school. Data obtained on the IPRI were subjected to principal components factor analysis with Varimax rotation. The two factors that emerged are consistent with the theories underlying the instrument. Factor I was social support, and had a coefficient alpha reliability of .90. Factor II was conflict, and had a coefficient alpha reliability of .86. Construct validity was assessed by testing hypotheses derived from theoretical propositions linking support or conflict to general humor, self-esteem, and symptom patterns; the results of the hypotheses were statistically significant and in the predicted direction. The findings indicate that the social support and conflict subscales of the IPRI have evidence of reliability and validity for early adolescents.