Two experiments examined the effects of reductions in cortical cholinergic function on performance of a novel task that allowed for the simultaneous assessment of attention to a visual stimulus and memory for that stimulus over a variable delay within the same test session. In the first experiment, infusions of the muscarinic receptor antagonist…

In adults, three phenomena are taken to demonstrate an experience effect on face recognition: an inversion effect, a non-native face effect (so-called "other-race" effect) and their interaction. It is crucial for our understanding of the developmental perception mechanisms of object processing to discover when these effects are present in…

A study investigated the size of the perceptual span within which adults use visual information to distinguish among letters as they read. The eye movements of fifteen college students were monitored as they read passages from a cathode-ray tube. On occasional fixations, letters in specified visual regions were replaced by other letters. The…

Through everyday experience people acquire knowledge about how moving objects behave. For example, if a rock is thrown up into the air, it will fall back to earth. Research has shown that people's ideas about why moving objects behave as they do are often quite inconsistent with the principles of classical mechanics. In fact, many people hold a…

Television wide-angle lenses expand distances and increase apparent velocity, while long lenses compress space and reduce apparent velocity. Based on these assumptions, a study was conducted (1) to examine the ability of viewers of different ages to recognize how lenses change the "real world" they project and (2) to extend Jean Piaget's…

The application of computer technology to reading research has made it possible to study the perceptual processes that take place as people read with a level of precision never before attainable. This computer assisted research has revealed that where the eyes go for fixations is of significance to normal reading and that during each fixation only…

The study involving 60 learning disabled (LD) and 30 normal achieving seventh through ninth graders was designed to identify adolescents homogeneously defined as exhibiting a "specific learning disability in arithmetic" and to determine if the cognitive processes (visual-spatial, visual-reasoning, and visual-memory) are related to the academic…

Differences in perceptual processes of good and poor readers relevant to single word perception have been studied in a series of experiments. The major differences between good and poor readers have been shown to occur at the level of the single word; other differences occur in knowledge of spelling patterns and ability to make use of letters'…

The testing of a number of hypotheses about the effect of hearing a prior context sentence on immediate processing of a subsequent target sentence is described. According to the standard deep structure model, higher level processing (e.g. semantic interpretation, integration of context-tarqet information) does not occur immediately as speech is…

INFANT SCRIBBLING ACTIVITY IS NOT SIMPLY PLAY. IT CONTRIBUTES TO THE DEVELOPMENT OF VISUAL ATTENTION AND PERCEPTION. YET, SCRIBBLING, UNLIKE WRITING IN THE COMMUNICATION SENSE, IS NOT MOTIVATED BY THE DESIRE TO INFORM, NOR TO SET DOWN THOUGHTS AND FEELINGS. THE EXPERIMENTAL HYPOTHESIS OF THIS STUDY WAS THAT THE MOTIVATIONS FOR SCRIBBLING ARE (1)…

THIS STUDY WAS DESIGNED TO TEST THE THEORY THAT LABORATORY GROUPS MAKING COMPLEX DECISIONS WILL DISTORT THEIR PERCEPTIONS OF EACH OTHER IN WAYS PREDICTABLE FROM NEWCOMB'S A-B-X MODEL OF PERCEPTUAL DISTORTION IN WHICH "A" REPRESENTS THE PERCEIVING INDIVIDUAL, "B" REPRESENTS ANOTHER MEMBER OF THE GROUP, AND "X" THE…

PRELIMINARY ANALYSES WERE UNDERTAKEN TO DETERMINE THE POTENTIAL CONTRIBUTION OF MOTION PICTURE FILMS TO FACTOR ANALYTIC STUDIES OF HUMAN INTELLECT. OF PRIMARY CONCERN WERE THE OPERATIONS OF COGNITION AND MEMORY, FORMING TWO OF THE FIVE OPERATION COLUMNS OF GUILFORD'S "STRUCTURE OF INTELLECT." THE CORE REFERENCE FOR THE STUDY WAS DEFINED…

RECENTLY MUCH ATTENTION HAS BEEN FOCUSED ON THE SUBJECT OF CONCEPT FORMATION IN CHILDREN. THE DEVELOPMENT OF SPATIAL PERCEPTION IS AN IMPORTANT ASPECT OF THIS, AND ONE IMPORTANT PART OF SPATIAL PERCEPTION IS HAPTIC PERCEPTION--THE RECOGNITION OF OBJECTS BY TOUCH. THIS STUDY IS A LONGITUDINAL INVESTIGATION OF THE RETENTION OF HAPTIC ABILITIES…

This report is part of a general study of Reference Measures for Cognitive and Noncognitive Factors. The main activity being reported is the development of "factor-referenced" or "marker" tests for several recently identified cognitive factors. A secondary activity involves the study of possible relationships to factors already…

This paper reviews nine studies which report conflicting results in assessing the relationship between children's role-taking ability and communication skills. The studies included satisfy three criteria: (1) role-taking and communication efficiency are measured independently; (2) tasks used to measure the two skills are significantly different in…