| Abstract: | Reviews information-processing studies applicable to the similar structure hypothesis, which holds that when nonorganically impaired retarded and nonretarded persons are similar in general developmental level, they are also similar in the cognitive processes and concepts by which they reason. Results are different from those of an earlier review by the 2nd author and K. O. Yeates (see record 1981-28282-001) that focused on Piagetian investigations. A meta-analysis revealed that the performance of retarded groups was significantly inferior to that of their nonretarded psychometric mental age peers. A significant relation between the mental age of the Ss and the probability of finding a significant difference between retarded and nonretarded Ss was also found. A number of alternative explanations are offered for these findings. (76 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
