The test-retest reliability of the American Guidance Service (AGS) Early Screening Profiles (ESP)--a battery measuring development in the cognition/language, motor, and self-help/social areas--was examined. The ESP is a nationally normed screening battery for children ages 2 years 0 months through 6 years 11 months. In addition, parent and teacher questionnaires were completed. The sample consisted of 116 children (60 females and 56 males) within the specified age range. Overall, 65% of the children were White, 31% were Black, 3% were Hispanic, and 1% was Southeast Asian. Each child was evaluated by examiners trained in administration of the battery. Retesting occurred an average of 3 weeks after initial testing, with a range of 2 days to 2 months. Pearson product moment correlations were computed; they produced the following test-retest coefficients for the immediate retest group: Cognitive/Language Profile, 0.90; Motor Profile, 0.70; and Self-Help/Social Profile, 0.81. For the delayed retest group, coefficients were: Cognitive/Language, 0.51; Motor Profile, 0.55; and Self-Help/Social Profile, 0.77. All correlations were statistically significant and fell in the moderate to strong range. The coefficients for the immediate group compare favorably with other instruments; the lower coefficients for the delayed group suggest that cognitive/language and motor skills may be very fluid at this age. Two tables summarize the data. (Author/SLD)