Psychological effects of urban and rural domiciles

The purpose of the investigation was to examine some problems concerning physical and mental differences between the population born and living in a large urban community (Group A), those who had moved from rural to urban setting (Group B), and stationary rural subjects (Group C). Each group consisted of 100 men between the ages of 19–25 years (total N= 300).     

A SCALING METHOD FOR MEASURING COLOR CONSTANCY

Recently developed types of indirect psychophysical scaling method served as starting point in finding a handy procedure for measuring differences in the degrees of 'color constancy'. A design for carrying out categorical comparisons with color paper proofs was constructed. The raw scores, given as percentage distributions, prove transformable into standard scale values. These demonstrate the shifted positions of the colors in question when presented in alternating conditions of illumination.     

THE PERCEPTION OF A VISUAL SHAPE AND OF ITS FRAME-SURFACE DURING CONTINUOUS TRANSFORMATION

The procedure differed from that of traditional shape constancy experiments in that cues for the slant of the total frame-surface containing the main figure, a shadow rectangle, were given. The impression of slant was determined by gradients of continuous perspective transformations caused by movable elastic material casting its shadow on a translucent screen. The following hypothesis was confirmed: the tendency to see a shape in its original proportions (i.e., those it has when shown in a frontal-parallel orientation) increases with the increasingly strong impression of the slant of its plane surface.     

COLOR CONSTANCY AND THE METHOD OF CATEGORICAL JUDGMENT

Some completion is given on a method for measuring color constancy criticized by Pietarinen (1966). Pietarinen's assumption, that our rating categories did not represent a single rank order, is untenable. A closer examination of the stimuli of the original study shows that the color sets included in, e.g., the Ostwald system allow at least for ordinal ranking of the responses, which was the main purpose of our investigation.