First and fifth graders in two IQ groupings reconstructed pictures which were variations on a prototypic picture. In subsequent recognition, children gave confidence ratings on the "oldness" of the pictures. Prototypes were recognized with most confidence. Younger and lower IQ children were less sure about noncases being "new".…

Previous studies have suggested that correlations between reaction time (RT) and intelligence (IQ) may have resulted from confounding interactions between stimulus uncertainty and visual angle. Three experiments that were designed to remove the confound were carried out with 118 college students. These experiments indicate that previously reported…

Individual differences in visual recognition memory and intelligence were correlated using 52 five-year-olds whose IQs ranged from 40-136. The correlation between memory performance and IQ was .70 for whole sample, and .61 when children with IQs below 75 were omitted. Immediate recognition memory is highly associated with intelligence. (Author/RD)

Sex differences in speed of solving mental rotation problems were replicated but college men and women were alike in frequency of use of algorithms to solve problems. The most frequent algorithm involved encoding stimuli in working memory, mental rotation of one to orientation of the other, comparison, and response. (Author/RD)

Statistically significant correlations of .37 and .57 were obtained between infant recognition memory scores obtained at four to seven months and later vocabulary tests of intelligence, for 54 children tested at four and for 39 children seen at seven years, respectively. Obtained values did not vary by sex. (Author/RD)

The predictive power of various cognitive skills at three months of age in terms of later cognitive functioning was examined. Visual habituation and recovery predicted later intellectual functioning at 24 months better than global intelligence or object permanence scores. Changes in cognitive functioning may be a transformation of skills.…

Ninety-six mildly mentally retarded persons and 96 nonretarded college students estimated the frequency of occurrence of words and pictures in a study test paradigm. Frequency estimates were equal for words, but the nonretarded subjects were superior in accuracy on pictorial items. This finding points to an encoding deficiency attributed to…

A novelty preference method was used to examine memory processes in retarded persons. Recognition memory as indexed by novel looking declined over the retention interval. Since memory is being inferred from response preferences which reflect an induced motivational state, satiation, the relationship between this state and memory must be…

Left-handers with an inverted handwriting posture were compared with other left-handers and with right-handers on a spatial reasoning test. Results were consistent with the hypothesis that left-inverted subjects had relatively bilateral representation of verbal and spatial functions. Bilateral representation is assumed to be inefficient.…

The differences between learning disabled (LD) and non-LD children's problem-solving protocols were analyzed during a picture arrangement task. Although the groups of 29 LD and 27 non-LD children were comparable in global mental processing and task performance, LD children had difficulty with representing problems and deleting irrelevant…