Effect of shifts in body weight on rats' straight alley performance as a function of reward magnitude

The performance of rats trained in a straight alley for 55 trials under 75% body weight and then shifted to 90% body weight was compared to that of rats trained only under 90% body weight. When training was with a small reward the speed of the shifted group decreased to the level of the 90% small reward control groups, but when training was with a large reward the speed of the shifted group dropped below the level of the 90% large reward control group. Thus, the effects on performance of shifting deprivation level following extended training depend on the reward magnitude employed.     

A Catholic perspective on organ sales.

In this article, I address the issue of the sale of human organs and the moral implications of a market in human organs under the aegis of Christian Bioethics. I argue that moral issues of this kind cannot be adequately be addressed from the point of view of moral frameworks, which point exclusively to procedural norms. Rather, a moral perspective must embody some substantive norms derived from a particular content-full moral or theological perspective. This substantive norms to which I appeal in this article are those of Roman Catholicism. The most important sources cited include the works of Pius XIi (1956) and the works of John Paul II (1985 and 1991). The conclusion reached is that not only is it morally permissible for Catholics to participate in a market in organ sales but it may also be prudent public policy.     

Prospective effects of interparental conflict on child attachment security and the moderating role of parents' romantic attachment.

This study investigated the impact of parents' observed conflict behavior on subsequent child attachment security, both as a main effect and as moderated by parents' romantic attachment. Participants were 80 heterosexual couples involving men from the Oregon Youth Study and their first-born children. The authors used hierarchical linear modeling to predict child security with each parent. Interparental psychological aggression predicted lower child security with father, regardless of romantic attachment. If the father was insecure, interparental positive engagement predicted lower child security with him. If either the mother or father was avoidant, interparental withdrawal did not predict lower child security, though it did for more secure parents. Results are discussed in terms of implications of attachment-(in)congruent behavior for parents' emotional availability.     

Associations of substance use problems with intimate partner violence for at-risk men in long-term relationships

Associations of substance use problems in men--defined as a man's meeting at least 1 criterion of dependence on each of a number of substances by his mid-20s--with their perpetration of intimate partner violence (IPV) were examined in an at-risk community sample of 150 men in long-term relationships from their late adolescence to their late 20s. Men who had a problem with substances other than sedatives (especially cannabis and hallucinogens) committed more IPV than did men without such problems. Most of the men who had a problem with marijuana also had an alcohol problem, which explains why alcohol was found to have only an indirect association with IPV. The failure of previous alcohol-use studies to control for co-occurrence of alcohol and marijuana problems may explain the discrepancy with conclusions from past research that alcohol problems contribute directly to the perpetration of IPV.     

Empirical evaluation and justification of methodologies in psychological science.

The purpose of this article is to describe a relatively new movement in the history and philosophy of science, naturalism, a form of pragmatism emphasizing that methodological principles are empirical statements. Thus, methodological principles must be evaluated and justified on the same basis as other empirical statements. On this view, methodological statements may be less secure than the specific scientific theories to which they give rise. The authors examined the feasibility of a naturalistic approach to methodology using logical and historical analysis and by contrasting theories that predict new facts versus theories that explain already known facts. They provide examples of how differences over methodological issues in psychology and in science generally may be resolved using a naturalistic, or empirical, approach.     

Scientism, deconstruction, and nihilism

I show how scientism leads to deconstruction and both, in turn, lead to nihilism. Nihilism constitutes a denial both of the existence of fallacious moral reasoning and the existence of a moral dimension to fallacious reasoning. I argue against all of these positions by maintaining that (1) there is a pre-theoretical framework of norms within which technical thinking function, (2) the pre-theoretical framework cannot itself be technically conceptualized, and (3) the explication of this framework permits us to identify both fallacies of moral reasoning and the immorality of fallacious reasoning.     

Catching up with wonderful women: The women‐are‐wonderful effect is smaller in more gender egalitarian societies

Inequalities between men and women are common and well‐documented. Objective indexes show that men are better positioned than women in societal hierarchies—there is no single country in the world without a gender gap. In contrast, researchers have found that the women‐are‐wonderful effect—that women are evaluated more positively than men overall—is also common. Cross‐cultural studies on gender equality reveal that the more gender egalitarian the society is, the less prevalent explicit gender stereotypes are. Yet, because self‐reported gender stereotypes may differ from implicit attitudes towards each gender, we reanalysed data collected across 44 cultures, and (a) confirmed that societal gender egalitarianism reduces the women‐are‐wonderful effect when it is measured more implicitly (i.e. rating the personality of men and women presented in images) and (b) documented that the social perception of men benefits more from gender egalitarianism than that of women.     

Introduction to special section on three-generation studies

Interest in lifespan research and cross-generational associations in parenting practices and child behaviors has grown rapidly in recent years. The four papers presented in this journal test three key intergenerational research questions regarding intergenerational continuities for externalizing behaviors, using different 3-generational samples.