Effects of the different components of the Distar language program were tested on 48 trainable mentally retarded (TMR) children. Three designs were used comparing IQ, sex, continuation status, selected standardized test results, and replicates. Results indicated that the degree of previous formal language training (continuation status) did not…

The effectiveness of the special school, special class, and regular class in the education of low IQ (49 to 70) and high IQ (71 to 85) educable mentally retarded pupils (n=120) (all between the ages of 7 and 12 years) was investigated. Effectiveness was determined by academic achievement, self concept, and social adjustment within school settings…

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…