Developed specifically for the ETS-Head Start Longitudinal Study, the ETS Enumeration I and II Test is designed to measure early numerical ability. Enumeration I tests the ability to itemize each member of a set by using a task that requires neither counting nor reciting the names of numerals. The purpose of the task is to assess the child's ability to organize a field of figures and to keep track of two shifting sets--a set of figures "pointed at" and a set "not-yet-pointed at." Enumeration II also measures this pointing ability while incorporating types of items found in primary-grade tests of quantitative ability, i.e., items requiring counting and the matching of equal numbers and spatial orderings of objects. The Enumeration tasks consist of a number of colored circles or small pictures, each on a page of paper. The child is asked to point to or to count each circle on that page or to point to the correct stimulus picture. Practice items precede each new item type. In the first year of the study, the Enumeration task consisted or one practice item and 12 tests items; the Year 2 version was divided into four parts: counting, pointing, same number, and order. The total score alpha reliabilities of .85 for Enumeration I and .77 for Enumeration showed the test to be relatively internally consistent in both years. The "order" items were found to be difficult, have low internal consistency and correlation with total score. The test was sensitive to sex, age, and SES differences in both Years 1 and 2. Tables provide the test data. Correlations with other measures reflected both perceptual and general information-processing competence. (For related documents, see TM 003 174-177, 179-198.) (DB)