A PARADIGM FOR OPERANT CONDITIONING IN BLOW FLIES (PHORMIA TERRAE NOVAE ROBINEAU‐DESVOIDY, 1830)

An operant conditioning situation for the blow fly (Protophormia terrae novae) is described. Individual flies are trained to enter and reenter a hole as the operant response. Only a few sessions of contingent reinforcement are required to increase response rates. When the response is no longer followed by food, the rate of entering the hole decreases. Control procedures revealed that rate of responding is not a simple overall result of feeding or of aging. The flies entered into the hole only if the response was required to obtain the food.     

Troublesome Sentiments: The Origins of Dewey’s Antipathy to Children’s Imaginative Activities

One of the interesting aspects of Dewey’s early educational thought is his apparent hostility toward children’s imaginative pursuits, yet the question of why this antipathy exists remains unanswered. As will become clear, Dewey’s hostility towards imaginative activities stemmed from a broad variety of concerns. In some of his earliest work, Dewey adopted a set of anti-Romantic criticisms and used these concerns to attack what one might call “runaway” imaginative and emotional tendencies. Then, in his early educational writings, these earlier concerns were augmented by several other factors, including problematic trends in progressive education, new developments in psychology, and Dewey’s own educational aims. This analysis explores the roots of these criticisms, and explains how they culminate in the stance on the imagination that Dewey eventually outlined in the early educational writings. Notably, these findings have some important implications for certain prominent contemporary critics of progressivism.     

Selective exposure: The impact of framing information search instructions as gains and losses

Previous research has found that people prefer information that supports rather than conflicts with their decisions (selective exposure). In the present paper, we investigated whether selective exposure was influenced by the method of information collection. Based on Prospect Theory we hypothesized that the method of selection (MOS), where simply selected pieces of information are considered, would lead to a higher selective exposure compared to the method of elimination (MOE), where pieces of information are rejected and the remaining pieces of information are considered. In fact, we found that participants collected information more selectively when they were instructed to use the MOS compared to the MOE. Copyright © 2009 John Wiley & Sons, Ltd.     

A Community Psychology of Men and Masculinity: Historical and Conceptual Review

This paper introduces the special section by presenting a historical and conceptual review of theory and research on the psychology of men and masculinity and then introducing the section’s papers. Men have power because of their gender, but differ in access to power based on other individual characteristics such as social class, income, education, ethnicity, sexual orientation, or physical strength. Men typically have been studied as generic rather than gendered beings in psychology. In contrast, a gendered analysis of men highlights the ways in which men’s experience, masculinity, and behavior contribute to health and social problems and to resources commonly addressed by community psychologists. Our gendered analysis suggests ways of working with men in group, organizational, and community settings to create positive individual and social change. Crucial to this analysis is the paradox that enacting masculinity both privileges and damages men. A second paradox stems from men having power as a group over women while individual men feel powerless or victimized by women as a group. The papers in this volume illustrate key themes of our historical and conceptual review through studies of adolescent and adult men as fathers, patients, partner abusers, support group participants and community members, and through examination of the impact of their gendered identities and behavior on health, well being, and justice.     

Chemical diffusion by vacancy pairs in intermetallic compounds with the B2 structure

This paper is concerned with the implications of vacancy-pair mechanisms on chemical diffusion in intermetallic compounds with the B2 structure. The discussion specifically includes the so-called triple-defect mechanism. It is shown that the vacancy-pair mechanism cannot contribute to chemical diffusion in the intermetallic compound at the stoichiometric composition AB. Focusing on the triple-defect mechanism we extend it to non-stoichiometric compositions by including isolated antistructural atoms. By means of Monte Carlo simulation we show that the efficiency of the triple-defect mechanism in providing for chemical diffusion increases linearly with increasing antistructural atom composition but the efficiency remains relatively low unless the composition is highly non-stoichiometric.