Administered the MMPI and the Social Interaction Self-Statement Test (SISST) to 92 18-49 yr old mental health center clients as part of the intake process. Ss' self-ratings and clinicians' ratings on the degree to which shyness had been a problem for S were also obtained. Results show that the Social Introversion scale of the MMPI was the most efficient predictor of the SISST scales. Both measures were equally efficient in predicting clinicians' ratings of shyness. Findings support the notion that cognitive assessment methods may complement information obtained by traditional assessment methods. (2 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1984 American Psychological Association.