This study examined (1) the psychometric qualities of a modified version of the Parent Behavior Form (PBF) designed to obtain ratings of parental behavior toward a child from four different family members, and (2) the effects of aggregating across raters on the reliability and generalizability of ratings of parental behavior. Subjects were 744 individuals from 186 families. The four participants from each family were a freshman college student, the mother, the father, and one sibling within 3 years of the student's age. Results showed the PBF to have overall good reliability and a consistent pattern of three factors--labeled warm involvement, harsh control, and lax control--for ratings of both mother and father by all four family members. These results suggest that the PBF can be a reliable and useful research instrument. It is probably unnecessary to reject data of subjects scoring high on either of the instrument's two validity indices. Results parallel those of Schwarz and others' study (1985) which found that aggregating ratings of multiple family members generally increased the reliability of ratings. Findings of the Schwarz study and the present study supply strong support for the continued use of children's reports as a means of measuring childrearing behavior. (RH)