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School psychologists increasingly are being asked to provide intellectual evaluations of preschool children, particularly those in special programs for the disadvantaged. The most widely used instruments appear to be the Stanford-Binet Intelligence Scale (Binet) and the Wechsler Preschool and Primary Scale of Intelligence (WPPSI).I n his manual for the WPPSI, Wechsler (1967) reports one study that compares WPPSI I& scores with scores from the Binet, the PPVT, and the PTI. The correlation coefficients ranged from .44 to .76. Wechsler suggests that the four instruments yield similar mean values, but he recognized that his sample of 98 children from one school district in California provides limited data for purposes of generalization and noted the advisability of further study in this area with other types of subjects.The primary purpose of this study was to obtain from local schools data that concern the measurement of intellectual ability in disadvantaged preschool children by means of the Binet and WPPSI. METHOD SampleSelection of students was based on teacher referrals for suspected mental retardation and/or suspected emotional-behavioral disorders. It was felt that this was the type of student most likely to receive psychological evaluation that involved the administration of the WPPSI and Stanford-Binet.The sample contained 20 pupils enrolled in the Alachua County Headstart Program for 6 weeks during the summer of 1972.The age range was from 4-8 to 6-6. Of the 20 Ss, 19 were Negro and 16 were male.Due to the limited size of the sample and the relatively homogeneous composition (Negro males), it was felt that an analysis of race or sex differences would not be appropriate. InstrumentsThe Stanford-Binet Intelligence Scale Form L-M (Terman & Merrill, 1960) and the Wechsler Preschool and Primary Scale of Intelligence (Wechsler, 1967) were administered to each pupil according to a counter-balanced design. Analysis of DataIndividual I& scores, ranges, means, sigmas, and correlation coefficients were computed from the test results via computer services available a t the University of Florida.