The effects of social reinforcement on two motor tasks by 40 retarded adolescents with high (8.09 yr.) and low (5.45 yr.) mental ages was investigated. Social reinforcement influenced persistence but not speed of performance. The effectiveness of praise on retarded subjects' performances varies with the type of motor task used. (Author/RD)

Three studies of college students found a sex difference in the correlation of memory scanning rate, short- and long-term components of free recall, and word recognition with memory span. Findings are discussed in terms of prior work and a theory presented to account for the obtained sex differences. (Author/RD)

Indices of scatter on the WISC-R and McCarthy Scales were examined for 20 educable mentally retarded and 20 learning disabled children in relation to 20 matched controls and to standardization samples. Exceptional children exhibited more subtest scatter and variability than the standardization sample but not more than the control group. (Author/RD)

Milkman (TM 504 643) accuses Arthur Jensen of misapplying heritability data in speculating on the causes of racial differences in intelligence test scores, and offers a method for illuminating Jensen's alleged error. It is contended in this article that Milkman has misconstrued Jensen's argument and that his method is without point. (Author/CTM)

Compares a group of 32 toddlers with employed mothers with a matched group of 38 toddlers with nonemployed mothers in order to examine the effect of maternal employment on the development of the child. While no differences were found between the two groups in language development and emotional adjustment, children of employed mothers were more…

Very close age spacing was an obstacle to high academic performance for later borns. In family relations and self-esteem, first borns scored better and performed in school as well as their potentially much more able younger siblings, regardless of age spacing. (Author)

This article reviews sex studies of children of cousin marriages and three studies of children of incestuous matings. It is argued that these studies, taken as a whole, provide no substantial evidence for an inbreeding depression effect within the polygenic system commonly asserted to determine IQ. (Author/DB)

Performance differences between 10 nonretarded children and 10 moderately/severely retarded adolescents on a manual control task were examined. Results suggested that the ability to discriminate internal cues is related to IQ differences. (Author)

The literature reveals a marked decline in performance on the Visual Reproduction subtest with increasing age. Both level of education and intelligence seemed to exert a substantial influence on performance which may be significant in clinical evaluations. (Author)

The Revised Wechsler Intelligence Scale for Children appears significantly to widen the gap between Black and White performance, increasing the likelihood of unjustified negative social and educational consequences. (Author/EB)

Analysis of correlations between Verbal and Full Scale IQ scores for 231 high-IQ psychiatric outpatients indicated that Verbal IQ appears partially valid as a WAIS short form for this higher IQ group. Results are interpreted in terms of Resnick and Entin's short form validity criteria. (Editor/SJL)

Groups of middle-aged and elderly men and women were compared on three problem solving tasks, including written problems, the 20-questions procedure, and problems administered on a Heuristic Evaluation Problem Programmer. (MS)

Anglos achieved higher scores in academic achievement, IQ, and occupational aspiration than did Navaho students; Anglo students who achieved higher scores had more positive views of the average Indian than Anglos with lower scores; Navaho stereotypes of Anglos were not related to achievement and intelligence level. (RW)

This study involving 30 college students with learning disabilities and 30 students without learning disabilities (ages 18-30) compared results obtained on the Wechsler Adult Intelligence Scale-Revised and the Kaufman Adolescent and Adult Intelligence Test. Results found no significant differences between the two groups or between tests.…

A study involving 106 gifted children and 71 typical children (ages 6-9) evaluated the correlation between intelligence and performance on the Test of Variables of Attention (T.O.V.A). Results found gifted children with ADHD performed better on tasks of omission error, commission error, and response sensitivity than typical children with ADHD.…