Cognitive and behavioral measures were administered to heterogeneous and homogeneous Mexican-American and Anglo groups at the beginning and end of the prekindergarten year. The results suggest that the learning environments of both homogeneous and heterogeneous groups have a facilitating influence. (SB)

Effects of heterogeneous and homogeneous grouping on the psychological functioning of Mexican American preschool children from economically disadvantaged families were investigated in a pilot project at San Jose State College Child Laboratory. Three experimental groups were composed of (1) 9 Mexican American children from low-income families and 9…