The effect of feedback training on distance estimation in virtual environments

It is often noted that distances are significantly underestimated in computer‐simulated (virtual) environments. Two experiments examine observers' ability to use error corrective feedback to improve the accuracy of judgments of egocentric and exocentric distances. In Experiment 1, observers viewed objects in an immersive virtual environment and estimated their distance through a blindfolded walking task. Different groups received feedback on either egocentric, exocentric or none of these judgments. Receiving feedback improved observers' ability to estimate only those distances for which feedback was provided. These effects persisted for at least 1 week. In Experiment 2, observers estimated egocentric distance by means of both a direct and indirect walking task. Receiving feedback on the direct walking task predominantly improved direct estimates and not indirect estimates. These findings suggest that although feedback training offers a relatively straightforward and immediate way of overcoming problems of distance estimation, its effects are specific to both the type of judgment and the type of response. Copyright © 2005 John Wiley & Sons, Ltd.     

The animate–inanimate distinction in preschool children

This study examined the development of the animate–inanimate (A–I) distinction in relation to other taxonomic categories in early childhood. Four‐ and 5‐year‐old children were administered two tasks measuring knowledge of taxonomic categories at various levels of inclusiveness. Across both matching‐to‐sample and object sorting tasks, the same pattern of categorization development was observed. Mastery of basic‐ and superordinate‐level categories was demonstrated by 4 years of age. Although 5‐year‐old children performed above chance on A–I level categories, their abilities were not as mature as those of adults. Results of this study support and extend previous studies investigating the development of children's understanding of naïve biology during the preschool years.     

SOCIAL SUPPORT NETWORK DIFFERENTIALS AMONG MARRIED AND NONMARRIED BLACK FEMALES

Being married has generally been associated with better mental health for adult females, in part because of the social support derived from a primary network relationship. Without the benefit of a spouse, it would be expected that nonmarried adult females would have fewer sources of social support and concomitantly lower levels of psychological well-being. Focusing on selected network characteristics, this study analyzes the differences in social support available to a sample of 91 married and 183 nonmarried Black females residing in a metropolitan area. Results indicate that having a spouse has little influence on the number of socially supportive relationships or the most important sources of assistance with financial problems. A marital partner is a source of emotional support for married Black females, but only for less than one-third. Family members and extended kin are major sources of social support for Black females, irrespective of marital status.