Two studies compared performance on conditional and trial-unique delayed identity matching-to-sample procedures with five subjects having moderate to severe mental retardation and four subjects with mild mental retardation. Across the studies, six of nine subjects showed lower delayed-matching accuracy when fewer rather than more stimuli were…

Processing of a probe stimulus can be affected either positively or negatively by presenting a related stimulus immediately before it. According to structural accounts, such effects occur because processing of the prime activates or inhibits the mental representation of the probe before it is presented. In contrast, transfer-appropriate processing…

In separate studies, observers viewed upright biological motion, inverted biological motion, or arbitrary motion created from systematically randomizing the positions of point-light dots. Results showed that observers (a) could learn to detect the presence of arbitrary motion, (b) could not learn to discriminate the coherence of arbitrary motion,…

The theory is developed and contrasted with other theories of pattern recognition in which concepts such as stimulus generalization, tuned detectors, and preprocessing play major roles. A relation of this theory to problems encountered among disabled readers ("dyslexics") is also brought out. (Author/BJG)

Research supported in part by a Public Health Service Fellowship (MH-6668) and by Grant M-3519 from the National Institute of Mental Health, U.S. Public Health Service.

This book is an introduction to the psychological study of basic learning processes in children. Written for students who are not majors in psychology and who do not have much familiarity with the technical vocabulary of psychology, it has two themes: even the most basic kinds of learning are included by cognitive processes or mental activities;…

The Responsive Model Program uses the typing or learning booth as an important part of its autotelic (self-rewarding) environment, to help children develop the mental processes involved in discovery of relationships, such as the association of sound with symbols, or discovering the rules of a game. The typing booth also helps children to develop…

The attention hypothesis of Zeaman and House is examined through a systematic, computer-simulation analysis of the parameter interactions found in One-Look model. (Author/SB)

Groups trained to compare the whole and subset improved in cue identification from negative instances; performance in the stimulus exposure group declined. (Authors)

The proposition was investigated that concept learning is a twofold process: acquisition of a prototype and development of generalization and discrimination skills. The assumption that formative evaluation procedures are necessary when attempting to prepare better instructional treatments for improved student performance was tested. (Author/GK)

Reports three experiments to investigate differences in the semantic classification of pictures and words. The data suggest that visual short-term memory and semantic memory operate in semantic-decision tasks though these sources of information differ in characteristics, potential for activation, and level of abstraction. (PMJ)