Biomedical subjects

J B Deregowski

Publications and source records attributed to J B Deregowski.

5 recordsLinked to original sources

PubMed1979

Perception of simple figures: implicit-shape constancy and mental rotation.

Adults were shown simple figures either drawn on their own or on a face of a depicted cube. Under each of these conditions they were required to find identical figures in an array of stimuli of either the first or the second type. The response chosen determined the next stimulus used, the figures in both being identical. Four chains of 10 responses were thus obtained. Comparison of the choices reveals that the set consisting of 'plain' responses to 'cube' stimuli diverges significantly from the other three sets. This result is discussed in the context of other studies of implicit-shape constancy.

Adult↗

PubMed1978

On reexamining Fortes' data: some implications of drawings made by children who have never drawn before.

Spontaneous drawings made by Tale subjects who had never drawn before, obtained by Fortes in the 1930s, are compared with those made by subjects coming from the same population who had learned to draw under Western influence. The disparity of styles of these drawings, it is argued, shows that it would be erroneous to suggest that a universal "grammar of drawing" can be derived by examination of drawings obtained from Western populations only. Such rare data from remote cultures offer therefore important safeguards against ethnocentricity in psychological theorising.

Acculturation↗

PubMed1978

Role of symmetry in pattern reproduction.

The role of enantiomorphs (mirror images) as units of coding of symmetrical patterns was investigated. Simple symmetrical matrices were presented tachistoscopically for 0.3 sec and were immediately followed by 0.3 sec presentation of the same matrix but with half of its cells occluded. The subjects were required to reproduce the first matrix. Five patterns of occlusion were used: random, lateral, skew, vertical and horizontal. It was found that lateral occlusion (which leads to a display of an enantiomorph) did not differ in its effectiveness from horizontal and vertical occlusions, although it conveyed twice as much information. Lateral, horizontal and vertical occlusions all differed significantly from the other two types which gave inferior results. In another experiment the effects of random and symmetrical occlusions were investigated; it was found that random occlusion was more effective than symmetrical occlusion. The results of the experiments, it is argued, show that information theory and gestalt approaches to the problem of symmetry are to some extent complementary.

Female↗

PubMed1976

Implicit-shape constancy: a cross-cultural comparison.

A group of Scottish schoolchildren were tested on a task intended to measure the effect of implicit-shape constancy, and the scores were compared with those obtained from African samples. It was found that both groups were influenced by the implicit-shape constancy although the influence was less in the African sample. The relationship of these findings to other published reports of cross-cultural research into pictorial perception and susceptibility to illusions is discussed.

Africa↗

PubMed1976

Implicit-shape constancy as a factor in pictorial perception.

Schoolboys from the Ivory Coast and from Kenya were tested on a simple task intended to detect the effect of implicit-shape constancy. The presence of such an effect was confirmed. Comparison of two Ivorean subsamples differing in their responses to a request to build a model of a depicted structure showed that those subjects who build flat (2D) models were less influenced by the implicit-shape constancy than those subjects who built three-dimensional structures. This confirms a postulated link between the implicit constancy and perception of pictorial depth.

Adolescent↗