Two experiments show that response to explicit dimensions is not crucial to the change from easier nonreversal to easier reversal shifts during overlearning in grammar school children ages 7, 8, and 9. (WY)

If learning is viewed in terms of the tendency to approach a stimulus that has been rewarded and to avoid a stimulus that has not been rewarded, then it must be concluded that the subjects in this study did not learn. (Author)

This study examined the equivalence of objects and pictures of objects in transfer discrimination of 72 children (ages 24-45 months). (BRT)

Study found that stimulus presence during a delay of reinforcement interval enhanced performance, and to a large extent prevented the usual delay-produced decrement. (Authors)

This study is an exploratory attempt to test the idea that individual differences in the rate of acquisition of an original discrimination learning are related to individual differences in the capacity to estimate the passage of time. Included is a review of the literature on the psychology of time which indicates that underestimation of time is…

Two groups of mentally retarded children (MA: 4 to 8 years) were pretrained using two different methods. It was predicted that shift performance of the two groups trained to use different strategies would resemble those of two different developmental levels. (MP)

Liniar functions fitted to the proportion of optional reversal shifts as a function of log CA were used to assess the effect of stimulus and training variables on the development of reversal-shift. (ST)

Results suggest that kindergarten children extinguish mediating responses faster than instrumental choice responses while the reverse probably holds with second graders. (Authors)

Studies of the ability of elderly debilitated patients to respond to conceptual training and their differential response to different kinds of conceptual shifts. (Authors/MB)

Presolution reversal prevented or significantly retarded learning in kindergarten and first-grade children but did not hinder learning in fifth-grade children. (Authors)

A correspondence is suggested between the two different abilities underlying performance on intellectual or learning tasks discussed by Jensen and the two response processes postulated by various mediational models of discrimination learning. To test this, two groups of nursery school children differentiated by the measurable social class of their…

Review of reversal learning data obtained from Ss of various developmental phases suggested that overtraining increases perseveration in pre-school children, and decrease perseveration in older (e.g., 1st grade) children. The present experiment tested this apparent trend. Children of two age groups (X = 4 yrs., 4 mos., vs. X = 6 yrs., 5 mos.)…