The premise of equipotentiality, which has been widely adhered to among learning theorists, states that the laws of learning should not vary with the use of particular stimuli, responses, or reinforcements. Investigates this premise. (Editor/RK)

The ventral eye of "Limulus" (horseshoe crab) contains only one type of photoreceptor. Behaviors mediated by the ventral eye provide an unambiguous representation of the function of that single-receptor type. Compares such behaviors with results of acute, single-cell investigations to assay for the contributions of candidate neural codes in the…

This paper describes two experiments that were designed to evaluate several possible models for the symbol-element paradigm. (Author)

It is the purpose of this paper to elaborate the concept of autocontingencies, distinguishing them from "traditional" contingencies, and to present data which bear directly on the acquisition and extent of behavioral control exerted by autocontingencies. (Author)

Deals with selective attention phenomena and elaborates on a stimulus material classification, "stimulus set" versus "response set", proposed by Broadbent (1970, 1971).

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

The frequency with which values on any stimulus dimension occur within the positive (and/or negative) category of a concept is a potential cue to which dimensions are relevant. Seven experiments, using a two-stimulus (one positive and one negative) simultaneous presentation paradigm, designed to explore frequency effects systematically, are…

A new approach to the study of "intuitive statistics" was developed in a series of five experiments dealing with the integration of numerical information. (Editor)

Three hundred and ninety-two high school graduates were tested for memory of names and portraits of classmates selected from yearbooks. (Editor)

The proposition that natural language concepts are represented as fuzzy sets, a generalization of the traditional theory of sets, of meaning components and that language operators--adverbs, negative markers, and adjectives--can be considered as operators on fuzzy sets was assessed empirically. (Editor/RK)

Article focused on the acquisition of sign language by chimpanzees in comparison with the acquisition of spoken languages and sign languages by human children. (Editor/RK)

This article reviews evidence of context effects in recognition, and of failure to recognize recallable words. (Editor)

The primary concern in this study has been to interpret the ways in which perception of a letter depends on properties of other letters present in the same display. (Author)

Uses an innocuous tone as the imperative stimulus, or unconditioned stimulus, as in a forewarned reaction time situation but with no overt response required. Evidence of conditioning and generalization to words is obtained. (Editor/RK)

Concerns the examination of conditioned stimulus--unconditioned stimulus (CS--UCS) intervals of different lengths. Demonstrates the feasibility of using a forewarned reaction time procedure with an innocuous imperative stimulus for the investigation of classical conditioning. (Editor/RK)