The effects of differences in the definition of mental retardation on prevalence were demonstrated with hypothetical data. (Author)

The purpose of the present study was to construct a short form of the WPPSI, composed of four tests. There is a need for a short form which should be particularly valuable to those who must evaluate the intelligence of large numbers of young children and who therefore face practical problems concerning administration time. (Author)

Study shows that cognitive development in severely subnormal adults is qualitatively different from that of normal children. (Editor)

The SIT is an individual test of intelligence, for both children and adults, requiring no specialized training. (Authors)

Within a given IQ range the correlation between intelligence level and certain tests of motor ability may be significantly higher than within a different IQ range. (CK)

Results of three experiments correlating CTAA with academic aptitude are discussed. (DB)

It was hypothesized that one could predict the reliability of the shortened WAIS on the basis of the Spearman Brown formula, and that in testing, as in other fields, you get what you pay for. Results confirmed these hypotheses; a short form is not an adequate substitute for the full WAIS. (Author)

The major findings of the study was that Torrance's tests of creativity acted as a suppressor variable, increasing the relation between IQ and achievement among the disadvantaged children sampled. (Author)