This article presents the results of an experiment that completely measures the utility function and probability weighting function for different positive and negative monetary outcomes, using a representative sample of N = 1,935 from the general public. The results confirm earlier findings in the lab, suggesting that utility is less pronounced than what is found in classical measurements where expected utility is assumed. Utility for losses is found to be convex, consistent with diminishing sensitivity, and the obtained loss-aversion coefficient of (...) 1.6 is moderate but in agreement with contemporary evidence. The estimated probability weighting functions have an inverse-S shape and they imply pessimism in both domains. These results show that probability weighting is also an important phenomenon in the general population. Women and lower educated individuals are found to be more risk averse, in agreement with common findings. In contrast to previous studies that ascribed gender differences in risk attitudes solely to differences in the degree utility curvature, however, our results show that this finding is primarily driven by loss aversion and, for women, also by a more pessimistic psychological response toward the probability of obtaining the best possible outcome. (shrink)

Moral distress has been widely reviewed across many care contexts and among a range of disciplines. Interest in this area has produced a plethora of studies, commentary and critique. An overview of the literature around moral distress reveals a commonality about factors contributing to moral distress, the attendant outcomes of this distress and a core set of interventions recommended to address these. Interventions at both personal and organizational levels have been proposed. The relevance of this overview resides in the implications (...) moral distress has on the nurse and the nursing workforce: particularly in regard to quality of care, diminished workplace satisfaction and physical health of staff and increased problems with staff retention. (shrink)

The power of sexual selection to influence the evolution of morphological traits was first proposed more than 130 years ago by Darwin. Though long a controversial idea, it has been documented in recent decades for a host of animal species. Yet few of the established sexually selected features have been explored at the level of their genetic or molecular foundations. In a recent report, Zauner et al.1 describe some of the molecular features associated with one of the best characterized of (...) sexually selected traits, the male‐specific tail “sword” seen in certain species of the fish genus Xiphophorus. Zauner et al. find that the msxC gene, a gene previously implicated in fin development from work in zebrafish, is dramatically and specifically upregulated in the development of the ventral caudal fin rays, which give rise to the sword, in males. The results provide the first molecular insight into the development of this sexually selected trait while prompting new questions about the structure of the entire genetic network that underlies this trait. To fully understand the molecular‐genetic and evolutionary history of this network, however, it will be essential to determine whether sword‐development is a basal or derived trait in Xiphophorus. BioEssays 26:116–119, 2004. © 2004 Wiley Periodicals, Inc. (shrink)

The recent explosion in advancements of communications technologies poses interesting challenges to courts and theorists interested in developing proper regulations. Continuing the traditional technology-based approach to press regulation risks preventing the newest technologies from filly serving the democratic dialogue. As the press has evolved into an institution and as advances in communication tend toward private rather than public interaction, we must assist community formation and face-to-face interaction, which proved vital to the success ofthe Constitution itself. Unless these new technologies are (...) regulated accordingly, comrnunity and face-to-face interaction risk extinction. (shrink)

C.H. Waddington is today remembered chiefly as a Drosophila developmental geneticist who developed the concepts of “canalization” and “the epigenetic landscape.” In his lifetime, however, he was widely perceived primarily as a critic of Neo-Darwinian evolutionary theory. His criticisms of Neo-Darwinian evolutionary theory were focused on what he saw as unrealistic, “atomistic” models of both gene selection and trait evolution. In particular, he felt that the Neo-Darwinians badly neglected the phenomenon of extensive gene interactions and that the “randomness” of mutational (...) effects, posited in the theory, was a false postulate. This last criticism dealt with the phenomenon known today as “developmental constraints.” Although population genetics itself has evolved considerably from its form at mid-20th century, much of Waddington’s critique, it is argued here, retains cogency. Yet, he did not attempt to develop a full-fledged alternative theory himself. Perhaps most surprisingly, in retrospect, is that he did not try to marry his work on gene interactions in development with his evolutionary interests, to create a theory of “genetic networks” and their evolution. Whether evolutionary genetics today will incorporate “network thinking” as a central element or whether there will be a general retreat to the more atomistic approach offered by genomics, remains an open question. (shrink)

Created at the behest of the abbess Uta, it is not only one of the most beautiful of Ottonian manuscripts but also one of the most complex. The collection of liturgical readings is preceded by four full-page frontispieces illustrating the Hand of God, Uta dedicating the codex to the Virgin and Child, a Crucifixion, and Saint Erhard celebrating Mass. Four evangelist portraits accompany the readings from each Gospel. In this groundbreaking study, Adam Cohen provides comprehensive explications of the codex’s (...) renowned illuminations as well as the first thorough investigation of its historical context. Cohen shows that the lavish miniatures, among the most elaborate pictures of the Middle Ages, use figures, ornaments, Latin tituli, and geometric schemata to fashion visual exegeses of great range and complexity. Through consideration of questions of function, patronage, and program, Cohen also demonstrates that the codex commemorates the abbess Uta’s efforts to reform conventual life and education. _The Uta Codex _will be of interest to scholars of medieval art as well as those exploring questions of women, monastic culture, and intellectual life in the Middle Ages. (shrink)

A hypothesis on the evolutionary origin of the genetic pathway of sex determination in the nematode Caenorhabditis elegans is presented here. It is suggested that the pathway arose in steps, driven by frequency‐dependent selection for the minority sex at each step, and involving the sequential acquisition of dominant negative, neomorphic genetic switches, each one reversing the action of the previous one. A central implication is that the genetic pathway evolved in reverse order from the final step in the hierarchy up (...) to the first. The possible applicability of the model to the other well‐characterized sex determination pathway, that of Drosophila melanogaster, and to sex determination in mammals, is discussed, along with some potential implications for pathway evolution in general. Finally, the specific molecular and population genetic questions that the model raises are described and some tests are proposed. (shrink)