In many non-human species, learning retention decreases temporarily following training. This has led to the suggestion that these lapses reflect a fundamental component of memory formation. If so, transient memory lapses should also be prevalent in humans, and should occur for all types of learning. In line with these predictions, we report two…

Building conceptual knowledge that generalizes to novel situations is a key function of human memory. Category-learning paradigms have long been used to understand the mechanisms of knowledge generalization. In the present study, we tested the conditions that promote formation of new concepts. Participants underwent 1 of 6 training conditions that…

Three source-memory experiments were conducted with Spanish-English bilinguals and monolingual English speakers matched on age, education, nonverbal cognitive ability and socioeconomic status. Bilingual language proficiency and dominance were assessed using standardized objective measures. In Experiment 1, source was manipulated visuo-spatially,…

Found that preschool children can form abstract concepts of left and right which are not bound to the specific training context: children were able to generalize to new figures and to new spatial locations. The nature of the preschool child's left-right judgments is discussed. (Author/RH)

Four of eight low-functioning, developmentally delayed preschool children initially failed to demonstrate expected oddity responding. In the context of a multiple baseline across-subject design, each of the previously unsuccessful children demonstrated significant increases in the percentage of correct oddity responses immediately upon…

IN A REPRODUCTION TASK WHICH INCLUDED INSTANCES OF SEVERAL SCHEMATA MIXED TOGETHER, SUBJECTS LEARNED TO DISTINGUISH AMONG THE SCHEMATA WITHOUT KNOWLEDGE OF RESULTS. A BEST FITTING EQUATION DESCRIBING PERFORMANCE AS A FUNCTION OF NUMBER OF REPRODUCTION TRIALS ACCURATELY PREDICTED LEARNING WITH NEW SUBJECTS AND PATTERNS RANDOMLY SAMPLED FROM A…

Tests were made of the effects of conceptual associations among words, a type of associative relationship not previously manipulated, on verbal discrimination learning. (Editor)

Study supported by Mental Health Research Grant 605-5-373.

This document describes the Conceptual Learning and Development (CLD) model of concept formation. According to the CLD analysis, a single concept is learned in the following successive levels of attainment: concrete, identity, classification, and formal. The four levels are considered applicable to concepts that are defined (or could be defined)…

The study examined the effectiveness of enhancing perceptual differentiation in the training of four developmentally delayed preschool children who were so low-functioning that they did not demonstrate oddity responding (ability to choose one distinct stimulus from a group of identical stimuli). Instead of the Arabic numerals used in the original…

A schema is best understood as a statistically defined concept. Schematic concept formation consists of abstracting the common elements or properties of a defined class in a schema. Thereafter, both discrimination and retention are facilitated, since only deviations from the schema need be processed for any particular class exemplar. In the…

Three experiments were conducted to determine the effectiveness of verbal and imaginal rehearsal strategies in children's discrimination learning. With verbal materials, imaging the referent of the correct item was more facilitative than vocalizing the correct item, as long as the former strategy was defined in a manner conducive to effective…

This paper reports a study carried out with 14 children (ranging in age from 2.8 to 3.5 years) which investigated children's concepts of difference. Pairs of small objects differing on a number of dimensions were presented to the children. As each pair of objects was presented, children were asked to select the object that was…