The principles of sexual selection were used as an organizing framework for interpreting cross-national patterns of sex differences in mathematical abilities. Cross-national studies suggest that there are no sex differences in biologically primary mathematical abilities, that is, for those mathematical abilities that are found in all cultures as well as in nonhuman primates, and show moderate heritability estimates. Sex differences in several biologically secondary mathematical domains are found throughout the industrialized world. In particular, males consistently outperform females in the solving (...) of mathematical word problems and geometry. Sexual selection and any associated proximate mechanisms influence these sex differences in mathematical performance indirectly. First, sexual selection resulted in greater elaboration in males than in females of the neurocognitive systems that support navigation in three-dimensional space. Knowledge implicit in these systems reflects an understanding of basic Euclidean geometry, and may thus be one source of the male advantage in geometry. Males also use more readily than females these spatial systems in problem-solving situations, which provides them with an advantage in solving word problems and geometry. In addition, sex differences in social styles and interests, which also appear to be related in part to sexual selection, result in sex differences in engagement iii mathematics-related activities, thus further increasing the male advantage in certain mathematical domains. A model that integrates these biological influences with sociocultural influences on the sex differences in mathematical performance is presented in this article. (shrink)

Mower questions some aspects of Geary's proposals regarding the nature of male-male and female-female relationships during human evolution and the implications for understanding the basis for same-sex friendships. The core of this proposal is reviewed and Mower's challenges to the core are addressed.

The relation between sex hormones and responses to partner infidelity was explored in two studies reported here. The first confirmed the standard sex difference in relationship jealousy, that males (n=133) are relatively more distressed by a partner’s sexual infidelity and females (n=159) by a partner’s emotional infidelity. The study also revealed that females using hormone-based birth control (n=61) tended more toward sexual jealousy than did other females, and reported more intense affective responses to partner infidelity (n=77). In study two, 47 (...) females were assessed four times across one month. Patterns of response to partner infidelity did not vary by week of menstrual cycle, but significant relations between salivary estradiol level and jealousy responses were obtained during the time of rising and high fertility risk. The implications, at least for females, are that any evolved psychological, affective, or behavioral dispositions regarding reproduction-related relationships are potentially moderated by estradiol, and that the use of synthetic hormones may disrupt this relation. (shrink)

The male advantage in certain mathematical domains contributes to the difference in the numbers of males and females that enter math-intensive occupations, which in turn contributes to the sex difference in earnings. Understanding the nature and development of the sex difference in mathematical abilities is accordingly of social as well as scientific concern. A more complete understanding of the biological contributions to these differences can guide research on educational techniques that might someday produce more equal educational outcomes in mathematics and (...) other academic domains. (shrink)

Sexual selection traditionally involves male-male competition and female choice, but in some species, including humans, sexual selection can also involve female-female competition and male choice. The degree to which one aspect of sexual selection or another is manifest in human populations will be influenced by a host of social and ecological variables, including the operational sex ratio. These variables are discussed in connection with the relative contribution of sexual selection and the division of labor to the evolution of human sex (...) differences. (shrink)

Hypotheses regarding the selective pressures driving the threefold increase in the size of the hominid brain since Homo habilis include climatic conditions, ecological demands, and social competition. We provide a multivariate analysis that enables the simultaneous assessment of variables representing each of these potential selective forces. Data were collated for latitude, prevalence of harmful parasites, mean annual temperature, and variation in annual temperature for the location of 175 hominid crania dating from 1.9 million to 10 thousand years ago. We also (...) included a proxy for population density and two indexes of paleoclimatic variability for the time at which each cranium was discovered. Results revealed independent contributions of population density, variation in paleoclimate, and temperature variation to the prediction of change in hominid cranial capacity (CC). Although the effects of paleoclimatic variability and temperature variation provide support for climatic hypotheses, the proxy for population density predicted more unique variance in CC than all other variables. The pattern suggests multiple pressures drove hominid brain evolution and that the core selective force was social competition. (shrink)

A sample of 460 low-income women completed a mate preference questionnaire and surveys that assessed family background, life history, conscientiousness, sexual motives, self-ratings (e.g., looks), and current circumstances (e.g., income). A cluster analysis revealed two groups of women: women who reported a strong preference for looks and money in a short-term mate and commitment in a long-term mate, and women who reported smaller differences across mating context. Group differences were found in reported educational levels, family background, sexual development, number of (...) children, and motives for having sex. Implications for understanding individual differences in women’s mate-preference trade-offs are discussed. (shrink)

We agree with Archer that human sex differences in aggression are well explained by sexual selection, but note that explanations of human behaviors are not logically mutually exclusive from explanations and therefore should not be framed as such. We discuss why this type of framing hinders the development of both social learning and evolutionary theories of human behavior.

Spatial and mathematical abilities may be “sex-limited” traits. A sex-limited trait has the same determinants of variation within the sexes, but the genetic or environmental effects would be differentially expressed in males and females. New advances in structural equation modeling allow means and variation to be estimated simultaneously. When these statistical methods are combined with a genetically informative research design, it should be possible to demonstrate that the genes influencing spatial and mathematical abilities are sex-limited in their expression. This approach (...) would give an empirical confirmation of Geary's evolutionary speculations. (shrink)

By means of an example, shows the possibility of beliefs that are separately rational whilst together inconsistent.

The target article skillfully evaluates data on mental disorders in relation to predictions from evolutionary genetic theories of neutral evolution, balancing selection, and polygenic mutation-selection balance, resulting in a negative outlook for the likelihood of success finding genes for mental disorders. Nevertheless, new conceptualizations, methods, and continued interactions across disciplines provide hope.

I argue that thought experiments are a form of experimental reasoning similar to real experiments. They require the same ability to participate by following a narrative as real experiments do. Participation depends in turn on using what we already know to visualize, manipulate and understand what is unfamiliar or problematic. I defend the claim that visualization requires embodiment by an example which shows how tacit understanding of the properties of represented objects and relations enables us to work out how such (...) objects might behave in a postulated world. This knowledge is that of embodied agents. That thought experiments require embodied participation is what makes them experiments rather than arguments. Unlike real experiments, from which ordinary perception has been displaced by instrumentation, thought experiments still appeal to relatively unmediated common sense, even when their purpose is to criticize or subvert common sense notions. (shrink)

St. John of the Cross’ work, The Dark Night of the Soul, and Joseph Symonds’ work, The Case and Cure of a Deserted Soul, offer two compelling treatments on the subject of spiritual dryness. Moreover, these works represent two spiritual traditions which offer distinct but viable perspectives on the Christian life. This paper seeks to answer the following question: What is the degree of similarity between St. John of the Cross’ understanding of the dark night of the soul and Joseph (...) Symonds’ understanding of spiritual desertion? A secondary question is also addressed: What is the value of these resources for pastoral care today? Although notable differences exist between the two, their degree of similarity is significant considering the disconnection between the spiritual traditions that each represent. Moreover, these works are invaluable resources for contemporary pastoral care. (shrink)

William James is frequently considered one of America's most important philosophers, as well as a foundational thinker for the study of religion. Despite his reputation as the founder of pragmatism, he is rarely considered a serious philosopher or religious thinker. In this new interpretation David Lamberth argues that James's major contribution was to develop a systematic metaphysics of experience integrally related to his developing pluralistic and social religious ideas. Lamberth systematically interprets James's radically empiricist world-view and argues for an (...) early dating for his commitment to the metaphysics of radical empiricism. He offers a close reading of Varieties of Religious Experience; and concludes by connecting James's ideas about experience, pluralism and truth to current debates in philosophy, the philosophy of religion, and theology, suggesting James's functional, experiential metaphysics as a conceptual aid in bridging the social and interpretive with the immediate and concrete while avoiding naive realism. (shrink)

The sciences use a wide range of visual devices, practices, and imaging technologies. This diversity points to an important repertoire of visual methods that scientists use to adapt representations to meet the varied demands that their work places on cognitive processes. This paper identifies key features of the use of visualization in a range of scientific domains and considers the implications of this repertoire for understanding scientists as cognitive agents.

Technology's contribution to economic growth and competitiveness has been the subject of vigorous debate in recent years. This book demonstrates the importance of a historical perspective in understanding the role of technological innovation in the economy. The authors examine key episodes and institutions in the development of the U.S. research system and in the development of the research systems of other industrial economies. They argue that the large potential contributions of economics to the understanding of technology and economic growth have (...) been constrained by the narrow theoretical framework employed within neoclassical economies. A richer framework, they believe, will support a more fruitful dialogue among economists, policymakers, and managers on the organization of public and private institutions for innovation. David Mowery is Associate Professor of Business and Public Policy at the School of Business Administration, University of California, Berkeley. Nathan S. Rosenberg is Fairleigh Dickinson Professor of Economics at Stanford University. He is the author of Inside the Black Box: Technology and Economics. (shrink)

Despite its long tradition in social psychology, we consider that Cognitive Dissonance Theory presents serious flaws concerning its methodology which question the relevance of the theory, limit breakthroughs, and hinder the evaluation of its core hypotheses. In our opinion, these issues are mainly due to operational and methodological weaknesses that have not been sufficiently addressed since the beginnings of the theory. We start by reviewing the ambiguities concerning the definition and conceptualization of the term cognitive dissonance. We then review the (...) ways it has been operationalized and we present the shortcomings of the actual paradigms. To acquire a better understanding of the theory, we advocate a stronger focus on the nature and consequences of the cognitive dissonance state itself. Next, we emphasize the actual lack of standardization, both in the ways to induce cognitive dissonance and to assess it, which impairs the comparability of the results. Last, in addition to reviewing these limits, we suggest new ways to improve the methodology and we conclude on the importance for the field of psychology to take advantage of these important challenges to go forwards. (shrink)

In the following paper I attempt to show how in Locke''s liberalthought the individual is subject to a complex operation involvingliberation and subjugation. In A Letter on Toleration (1685),Locke argues that the individual''s inward beliefs should be freed fromthe coercion of Church and State. To ensure liberty of conscience, theindividual''s soul should be constituted in practice – notstructured by violence but negotiated by rational persuasion. However,as I suggest, the authority of reason is not established without anelement of violence. In his (...) writings on education, Locke maintains thatthe right to care for one''s soul should be enjoyed only after rigorousmoral training. Thus, the individual''s conscience is to be freed fromoutward violence of ecclesiastic and civil powers only after first, inyouth, being subject to the moral discipline of esteem, disgrace, andshame, the inward violence of which discloses limits in Locke''sdiscourse on toleration. (shrink)

"Dr. Rubin has brought cognitive psychology into a wholly unprecedented dialogue with studies in oral tradition. The result is a truly new perspective on memory and the processes of oral tradition." --John Miles Foley, University of Missouri.

Leading a corporation through a crisis requires rational decision making guided by an ethical approach (Snyder et al., Journal of Business Ethics, 63, 2006, 371). Three such approaches are virtue ethics (Seeger and Ulmer, Journal of Business Ethics, 31, 2001, 369), an ethic of justice, and an ethic of care (Simóla, Journal of Business Ethics, 46, 2003, 351). In this article, I consider the effectiveness of these approaches for leading a corporation after a crisis. The standard I use is drawn (...) from recent studies that examine how people tend to react to corporate unintentional harms. I conclude from these studies that an ethic of care approach is most effective for managing corporate crises when it comes to stakeholder concerns. I conclude the article with strategies for managing a crisis using an ethic of care. (shrink)

Book reviewed in this article: Balancing Act: The New Medical Ethics of Medicine's New Economics. By E. Haavi Morreim.

In this work David Durst explores the development of modernism in the philosophy, politics, and culture of the first German Republic between 1918 and 1933. Through a reasoned critique of various Weimar intellectual figures such as Ernst Bloch, Martin Heidegger, and Theodor Adorno, Durst offers clarity and insight into the various aesthetic postures of the interwar period. From the cultural vibrancy of the early Weimar period to the eventual decay towards fascism and Nazi rule,Weimar Modernism provides a new and (...) coherent way to examine this important era, which has often been presented in a fragmented manner. (shrink)

I offer a critical analysis of a view that has become a dominant aspect of recent thought on the relationship between evolution and morality, and propose an alternative. An ingredient in Michael Ruse's 'error theory' (Ruse 1995) is that belief in moral (prescriptive, universal, and nonsubjective) guidelines arose in humans because such belief results in the performance of adaptive cooperative behaviors. This statement relies on two particular connections: between ostensible and intentional types of altruism, and between intentional altruism and morality. (...) The latter connection is problematic because it makes morality redundant, its role having already been fulfilled by the psychological dispositions that constitute intentional altruism. Both behavioral ecology and moral psychology support this criticism, and neither human behavioral flexibility nor the self-regard / other-regard distinction can provide a defense of the error theory. I conclude that morality did not evolve to curb rampant selfishness; instead, the evolutionarily recent 'universal law' aspect of morality may function to update behavioral strategies which were adaptive in the paleolithic environment of our ancestors (to which our psychological dispositions are best adapted), by means of norms more appropriate to our novel social environment. (shrink)