Purpose of this experiment was to explore the effects of pre- and postshift stimulus similarity, type of shift, and difficulty of discrimination in the standard solution shift - concept identification paradigm. (Authors/CB)

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)

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

Results of the three experiments provided little evidence that the scores on associative matching were adversely affected by prior performance on any of the three modified free-recall tasks. (Authors)

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

A single administration of the reversal learning paradigm is not a sufficient basis for determining either a given subject's choice of option or his behavior on its constituent learning measures. This conclusion raises many questions about past research relating to mediation theory, since this paradigm has been the basic one employed. (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.)…