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)

Findings are most consistent with a mediation interpretation of transfer. (Authors)

Results are consistent with the assumption that subjects do not change functional stimuli because of the negative transfer produced by learning different responses to the same nominal stimuli. (Authors/CB)

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

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

The ability of children of 3-5 years to acquire mediated solutions to conceptual problems and to execute rapid reversal shifts within these concepts suggests that their problem solving capacity is not necessarily limited to simple associative responses. (Authors)

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.)…