In order to assess the quality of stimulation in the home environment, the Inventory of Home Stimulation (HOME) was used as part of the evaluation strategy for the Houston Parent Child Development Center Program, which attempts to help parents develop their competence as teachers of their own children. One hundred low income, Mexican American families were randomly assigned to program or control groups. The Bayley Infant Scales of Development were used at 12 and 24 months, and the Stanford-Binet at 36 months as measures of general intellectual functioning. Palmer's Concept Familiarity Index and a measure of bilingual development were also used. Along with HOME, the parent assessment battery included a long interview, several verbal-attitudinal measures, measures of second language learning, and a videotaped, structured mother-child interaction situation. Results have shown significantly higher scores for the program group at the end of the program. However, the relationship of HOME scores to child cognitive scores was not clearly patterned. This may be partly due to the narrow range of scores, but the presence of some negative correlations suggests the possibility of cultural differences which alter the pattern of relationships between the family environment and child cognitive functioning. (BW)