Learning to categorize perceptually similar stimuli can result in people becoming more sensitive to differences along perceptual dimensions that are relevant to category membership and/or less sensitive to equivalent differences along irrelevant perceptual dimensions. These effects of acquired distinctiveness and acquired equivalence may be caused…

Recent context-control learning studies have shown that switch costs are reduced in a particular context predicting a high probability of switching as compared to another context predicting a low probability of switching. These context-specific switch probability effects suggest that control of task sets, through experience, can become associated…

Feedback is highly contingent on behavior if it eventually becomes easy to predict, and weakly contingent on behavior if it remains difficult or impossible to predict even after learning is complete. Many studies have demonstrated that humans and nonhuman animals are highly sensitive to feedback contingency, but no known studies have examined how…

We present a neurocomputational model with self-organizing maps that accounts for the emergence of taxonomic responding and fast mapping in early word learning, as well as a rapid increase in the rate of acquisition of words observed in late infancy. The quality and efficiency of generalization of word-object associations is directly related to…

GIVEN THE TASK OF LEARNING A SERIES OF RANDOMLY ORDERED MEANINGFUL ITEMS, MOST SUBJECTS (SS) IMPOSE SOME ORGANIZATION ON THE MATERIAL DURING THE PROCESS OF LEARNING. AN EXPERIMENTAL PARADIGM IS DESCRIBED WHICH PERMITS THE OBJECTIVE SCORING OF EACH S'S SUBJECTIVE ORGANIZATION OF THE MATERIAL ON EACH LEARNING TRIAL. THE CENTRAL FEATURE OF THE…

Article examines the importance of retrieval factors in recall as well as suggesting a method which may be useful in studying within-category recall. (Author/ML)

Twenty-eight learning disabled children, 6 1/2 years of age, who lacked skills and maturity for first grade placement, were tested randomly, assigned to groups, and trained either in a sequence of activities to improve grouping and memory strategies (experimentals) or in a specialized program of art experiences (controls). (MC)

Contrary to the basic-level restraint hypothesis, which suggests that young children learn basic-level words more easily than specific-level words, these five studies show that although other constraints on word meaning may be in place, children are flexible in interpreting new words at different hierarchical levels. (MDM)

Examined whether superior recall of items in event-based categorical relations, or "slot fillers," remained when association and typicality were controlled. Found that only children receiving the typical + high association slot-filler list showed significantly better recall than with the taxonomic-coordinate list, with no differences…