Examined major discriminating factors for cognitive development in high-IQ and low-IQ children in child care who had been adopted after age four. Found that birth rank, maternal mental retardation, pregnancy/delivery complications, severe prematurity or low birthweight, and number of hospitalizations differentiated the two groups. Over time, IQs…

The longitudinal study examined the dropout rate of a group of Chicano students who were registered 7th graders in the Tooele School District in the 1967-68 school year. If these students made normal progress, they graduated from high school at the end of the 1972-73 school year. All Spanish-surname students found on the 7th grade rosters of…

An experimental group of 51 students from non-graded and three matched groups of 187 pupils from graded programs were studied to determine the relative effectiveness of non-graded and graded approaches to elementary education and whether any differences found at the end of six years of schooling remained after both groups had been exposed to a…