THREE STUDIES OF PRESCHOOL CHILDREN ARE INCLUDED IN THIS EVALUATION REPORT. (1) "'NEURAL CONDUCTIVITY' AND ACHIEVEMENT IN CULTURALLY DEPRIVED STUDENTS." NEURAL CONDUCTIVITY WAS INFERRED FROM A CORRELATION BETWEEN PUPILLARY RESPONSE AND CHILDREN'S PRESCHOOL PERFORMANCE. COMPLICATIONS IN ACQUIRING AND USING THE NECESSARY EQUIPMENT RESULTED IN THE AVAILABILITY OF ONLY 7 SUBJECTS AND INSUFFICIENT DATA FOR ANALYSIS. (2) "STIMULUS PREFERENCE AMONG CHILDREN OF DIFFERENT ETHNIC BACKGROUNDS." PREFERENCE FOR COLOR OR FORM, SYMMETRICAL OR ASYMMETRICAL DIMENSIONS WAS TESTED WITH CHILDREN OF NEGRO, INDIAN, AND ANGLO BACKGROUNDS. SUBJECTS WERE SHOWN 40 1-FOOT-SQUARE CARDS, EACH WITH 3 STIMULI ARRANGED IN A TRIANGLE, AND ASKED TO MAKE SELECTIONS. RESULTS SHOWED THAT PERSONALITY VARIABLES AND SOCIALIZATION INFLUENCES AFFECTED STIMULUS PREFERENCE, WITH CHILDREN FROM A CERTAIN CULTURAL BACKGROUND GENERALLY PREFERRING THE SAME STIMULI. (3) "A PERCEPTUAL COMPONENT OF VISUAL-ANALYTIC SKILLS." A TACHISTOSCOPE WAS USED FOR CHILDREN TO VIEW DRAWINGS OF CLASSROOM OBJECTS AND TO INDICATE RECOGNITION BY IDENTIFYING THE ACTUAL OBJECTS. A VISUAL-ANALYTIC SKILLS TEST, DEVELOPED FOR THE EXPERIMENT, WAS USED AS A CRITERION INSTRUMENT OF FORM PERCEPTION ACCURACY. THE EXPERIMENTAL TREATMENT WAS INEFFECTIVE IN PRODUCING VISUAL DISCRIMINATION ACCURACY GAINS OVER AN 8- TO 10-WEEK PERIOD. (MS)