This paper summarizes data comparing the correlation patterns of psychometric, social, and demographic variables with intelligence quotient (IQ) and learning potential (LP) scores derived from the Kohs Block Designs and Raven Progressive Matrices procedures. The sample consists of educable mentally retarded special class and institutionalized students ranging from 7 to 15 years of age. These studies attempted to determine demographic and psychometric factors that account for significant portions of variance in scores on the Kohs and Raven problems before and after training, and to compare these factors with those related to scores on the Stanford-Binet IQ Test. With all variables partialled out, verbal and nonverbal IQs and demographic factors reflective of higher socioeconomic status predicted pretraining scores. Race, social class variables, and verbal IQ did not relate to post-training scores. (Author/LAA)