A table for prorating incomplete Form R MMPIs

Provides and describes a table for prorating scales when the entire Form R has not been completed. The table includes the standard validity and clinical scales, as well as Ego Strength and the Subtle and Obvious scores, and ranges from 200 to 390 completed items in increments of 10. MMPIs from 190 patients were used to test the accuracy of these conversions for 200, 250, 300, and 350 items. Good concordance of profile types was found for 300 and 350 completed questions, but clinical interpretations based on only 200 items may be suspect. (8 ref)