The present study investigated the structure of categories and concepts in psychological research and the nature of mental representations in general. (Author/RK)

The present study provided two lines of indirect support for the explanation of errors in syllogistic reasoning advanced by Chapman and Chapman (1959). (Author/RK)

This research investigated whether a person who gives familiar, easy to understand associations is better liked than someone who gives unfamiliar, hard to understand associations. (Author/RK)

The technique of priming was used to study the nature of the mental representations generated by color names. (Editor)

In three experiments involving situations previously called upon in support of representativeness theory, questionnaire responses from 265 university students demonstrated systematic biases that deviated sharply from the obvious predictions of the theory. The implications for representativeness theory are discussed. (Editor/RK)

Research by Posner and Mitchell (1967) was used to investigate levels of noise processing in testing subjects' ability to "gate out" the processing of irrelevant and unwanted material. Three experiments are reported in which subjects had to judge whether two letters were the "same" or "different". Noise elements were included to test attention…

Using a network of comparisons, B. Hayes-Roth and F. Hayes-Roth found that subjects performed better on adjacent than on nonadjacent comparisons. Results suggested that such networks are processed in a manner fundamentally different from simple linear arrays. Here subjects were required to learn a similar knowledge structure. These results…

From experiments showing that subjects differentially attend to parts of the visual field, psychologists have inferred a limitation on human visual information processing capacity. The model presented describes an optimal way to allocate a limited quantity of "cognitive resources", "attention" or "mental effort". An experiment tests this model.…

Recent research has suggested that outcome feedback is not the optimal form of feedback for learning complex interference tasks. The present experiment was designed to test the effects of outcome feedback against cognitively oriented feedback in a number of linear tasks. (Editor)

The author attempts to obtain some new evidence on simple addition processes in adults in order to evaluate the two additon models offered by Groen and Parkman (1972); a simple counting model and a more complex retrieval model, involving direct access and counting. (Author/RK)

This study attempts to discriminate between 2 theories about strategies Ss use when trying to remember a linear ordering. (Editor)

Three word-identification experiments suggest that a model derived from experiments with pseudowords can be applied successfully to word identification. The data derived from the experiments confirm the role of higher order verbal units in word identification and suggest the structural components of a verbal-mediation theory of reading. (Editor/RK)

Four commissurotomy patients were tested for ability to match tachistoscopically presented stimuli with pictures in free vision, according to either structural appearance or functional/conceptual category. (Editor)

Subjects were asked to decide if a pair of visually presented letter strings were both words (lexical decision task). Results supported an automatic spread of excitation model of associative facilitation. (Editor/RK)

Authors believes that three phenomena are all instances of "learned helplessness," instances in which an organism has learned that outcomes are uncontrollable by his responses and is seriously debilitated by this knowledge. This article explores the evidence for the phenomena of learned helplessness, and discussed a variety of theoretical…