The report examines the identification of potentially handicapping conditions in an adolescent population using data from the National Center for Health Statistics' survey (approximatey 8,000 adolescents selected in 1968). Identification of the following disabilities were examined: hearing impairment, vision problems, orthopedic handicaps, mental retardation, emotional disturbance, speech impairments, and slow learner problems. Data were gathered through school questionnaires, household and parent questionnaires, physical examinations, vision and audiometry tests, and psychological examinations. Among results discussed are that parent responses tended to produce higher estimates of handicapping conditions than teacher recommendations and test information; there were significant differences in the rate of identification among socioeconomic and demographic groups; and the rate at which teachers identified the need for special education resources dramatically declined with student age. Findings generally supported those from a previous study of 6 to 11 year olds which found that there is sometimes wide variation in the rates that result from the application of different indicator sets for a particular handicap, and the overlap between identified groups is generally quite small. (CL)