This battery of test instruments is one of a set of three developed for use in the study of bilingual (English-Spanish) instruction programs and other compensatory programs in Texas. The socialization inventory has been based on a sociological view of personality as a developing and changing entity. Four submeasures of socialization are included in this manual: (1) a measure of self-concept individually administered for preschoolers or group-administered for school-age children, (2) a behavior rating scale of a child's interpersonal behavior in an interview with the test administrator, (3) a behavior rating scale of a child's general social behavior in the classroom, and (4) a questionnaire given to parents of children in the bilingual programs. Directions for administering and rating each measure are given. Samples of the socialization measures and their rating sheets form the bulk of this report. (MS)