Basic objects in natural categories

Categorizations which humans make of the concrete world are not arbitrary but highly determined. In taxonomies of concrete objects, there is one level of abstraction at which the most basic category cuts are made. Basic categories are those which carry the most information, possess the highest category cue validity, and are, thus, the most differentiated from one another. The four experiments of Part I define basic objects by demonstrating that in taxonomies of common concrete nouns in English based on class inclusion, basic objects are the most inclusive categories whose members: (a) possess significant numbers of attributes in common, (b) have motor programs which are similar to one another, (c) have similar shapes, and (d) can be identified from averaged shapes of members of the class. The eight experiments of Part II explore implications of the structure of categories. Basic objects are shown to be the most inclusive categories for which a concrete image of the category as a whole can be formed, to be the first categorizations made during perception of the environment, to be the earliest categories sorted and earliest named by children, and to be the categories most codable, most coded, and most necessary in language.     

A developmental study of visual search behavior

Children in second, fourth and sixth grades and college sophomores were compared on a visual search and scanning task under three experimental conditions. In Condition I, a single target letter was sought in a list of letters of low visual confusability. In Condition II, two target letters were sought but only one appeared in a given list. In Condition III, a single target letter was sought in a list of letters of high confusability. Search time decreased with age in all three tasks. Searching for two targets was no harder than searching for one. A highly confusable visual context increased search time at all age levels.     

The Effects of Training on Perceptions of Sexual Harassment Allegations

This study of 176 college juniors examined the effects of respondent gender and sexual harassment training on the perceptions of what constitutes sexual harassment in the workplace. Variation in these perceptions, due to severity of the sexually oriented behavior, was also examined. Regardless of the subject's gender, individuals who 6 weeks earlier had seen a training film about sexual harassment rated severe sexually oriented work behaviors as more harassing than did individuals who had not seen the film. Additionally, males who had not seen the film rated ambiguous sexually oriented behaviors as less harassing than did males and females who had seen the film, and as less harassing than females who had not seen the film. Implications for the importance of training in addressing sexual harassment are discussed.