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)

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)

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)

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)