This report gives estimates of the intellectual maturity based on the Goodenough-Harris Drawing Test (GHDT). The data were collected in Cycle III of the Health Examination Survey of noninstitutionalized U.S. youths during 1966-70. The GHDT instructions were modified for use in the survey to require each youth to draw two figures--a "person" and a "self" figure. Sexual differences in preferences and performances levels in drawing male and female figures are reported. Three charts present mean raw scores earned by boys and girls at each given age on the drawings of a man and woman. Two of the graphs contain data from the Cycle II examination of children 6-11 years of age so that the developmental trends in the drawing of a "person" can be seen from age 6 through age 17. These two charts also present similar data from Harris' 1963 standardization group for comparison with the survey's findings. Twenty-three tables provide raw score data and norms for the modified GHDT in the form of standard scores and percentile equivalents. These data are presented for the "person" and "self" drawings by the type of drawing (man and woman) and the sex and age of the subject. (Author/MLP)