Pigeons' preference for variable-interval water reinforcement under widely varied water budgets.

Water budget of pigeons was varied to assess the dependence of risk-sensitive preferences upon economic context such as has been reported for energy-budget manipulations with small animals in behavioral ecology research. Fixed- and variable-interval terminal-link water schedules reinforced choice between equal variable-interval initial-link schedules arranged on two pecking keys. While keeping a severely restrictive budget the same across three phases of the experiment, a contrasting distinct ample budget was arranged in each. To mimic typical methods in behavioral ecology studies, in each ample budget a more than three-fold increase in amount of water per reinforcer presentation was instituted simultaneously with significantly increased overall access to water. Total choice response rates plummeted in the ample budgets, and body weights either increased significantly or remained unchanged in different phases as expected by the nature of the different manipulations. Clear preferences for the variable-interval schedule were found throughout the experiment, except for rare instances of key bias. The results agree with similar operant food-reinforcement studies and extend conditions under which risk preference apparently does not depend upon economic context.     

Computation of cone contrasts for color vision research

Cone-contrast coordinates have proved useful for representing transient test stimuli used in color vision experiments. These representations automatically take into account the spectral absorption of cones and any Weberian adaptation to steady fields of light. Under these conditions, they also can be interpreted as being an approximation to the incremental cone response. A detailed methodology is presented for making appropriate measurements and calculations of cons contrasts for any light source, especially color monitors.     

Religiosity and Cancer Screening

Churches have been suggested as avenues to reach African-American populations with messages about health because of their strong participation in church activities. Membership in several religious denominations has been associated with healthy lifestyle practices that are associated with lower cancer-incidence rates and better coping strategies among cancer patients. Among African-American women, however, belief in God as their doctor might preempt seeking treatment for cancer. The goal of the present study was to examine the influence of church participation and religious beliefs on the utilization of breast and cervical cancer screening among low-income, predominantly African-American women. A cohort consisting of 290 women was surveyed at baseline and one year later to determine the association between screening rates in the past year and measures of religiosity. The majority of women were members of a church (88%), with fairly regular church attendance (51% reported weekly attendance), and strong beliefs regarding God's influence on their health (e.g. 88% agreed that God was their doctor). Church attendance was the only religious variable related to screening frequency in univariate analyses, with those reporting attending church 1–3 times per month more likely to receive mammography screening (p = .013). Churches can provide avenues to reach African-American women about cancer screening; strong religious beliefs do not, however, appear to keep women from receiving regular screening exams.     

The golem: Uncertainty and communicating science

This paper elaborates on the golem metaphor as a way of understanding uncertainty in science. Its implications for the ethics of communicating science are explored.     

Soccer referees’ experience of threat and aggression: Effects of age,experience, and life orientation on outcome of coping strategy

The present study examined the circumstances pertaining to threat and aggression during soccer matches as experienced by 107 provincial Soccer Association referees. Three sources of aggression were identified—soccer players, coaches/trainers, and spectators—and the main measures included threat and physical and verbal aggression. Several outcomes, including prematch worry and effects on concentration, performance, and motivation, were affected by the incidence of threat and aggression, and these outcomes were found to be affected by the age, degree of experience, and life orientation of the referees. Younger referees were shown to be the most prone to threat and aggression. Referees with a generally pessimistic orientation experienced less motivation, worse performance, and greater problems coping with aggressive behavior from the spectators compared with referees with a generally optimistic orientation. Aggr. Behav. 28:317–327, 2002. © 2002 Wiley‐Liss, Inc.     

Implicit and explicit tests of odor memory reveal different outcomes following interference

Experiencing two odors as a mixture can later increase their perceived similarity when presented separately. Such an increase in similarity can be used as an implicit measure of how well participants remember the mixture. Three experiments tested the resistance to interference of this effect by first giving participants exposure to two 2-odor mixtures and then presenting each odor from one mixture (interfered pair) separately many times. After the latter interference phase, participants rated the similarity of the two odors in each pair. The experiments varied in terms of the number of initial exposures to the mixtures, the number of odor presentations in the interference phase, and the control conditions employed. No difference in similarity ratings for the interfered and non-interfered pair was found in any experiment. In contrast to the lack of interference with this implicit measure, an explicit measure of memory based on participants’ ratings of odor frequency revealed that they could recall to some degree that the interfered odors had been presented alone in the second phase. These results suggest that implicit memory for odor mixtures is highly resistant to interference and is consistent with a configural encoding account of this effect.     

Development and examination of the social appearance anxiety scale

The Social Appearance Anxiety Scale (SAAS) was created to measure anxiety about being negatively evaluated by others because of one's overall appearance, including body shape. This study examined the psychometric properties of the SAAS in three large samples of undergraduate students (respective ns = 512, 853, and 541). The SAAS demonstrated a unifactorial structure with high test-retest reliability and internal consistency. The SAAS was positively associated with measures of social anxiety. The SAAS was also related to greater disparity between perceived, actual, and ideal physical attributes, beliefs that one's appearance is inherently flawed and socially unacceptable and that being unattractive is socially deleterious, feelings of unattractiveness, emphasis on appearance and its maintenance, and a preoccupation with being overweight. It was a unique predictor of social anxiety above and beyond negative body image indicators. Findings suggest that the SAAS is a psychometrically valid measure of social anxiety regarding one's overall appearance.     

Addressing moral problems through practical reasoning

In this paper, following the work of Hare, we consider moral reasoning not as the application of moral norms and principles, but as reasoning about what ought to be done in a particular situation, with moral norms perhaps emerging from this reasoning. We model this situated reasoning drawing on our previous work on argumentation schemes, here set in the context of Action-Based Alternating Transition Systems. We distinguish what prudentially ought to be done from what morally ought to be done, consider what legislation might be appropriate and characterise the differences between morally correct, morally praiseworthy and morally excusable actions. We also describe an implementation which simulates this reasoning and discuss some issues arising from the simulation.     

Community Service Experiences and Commitment to Volunteering1

University students who were involved in a community service field placement completed the Inventory of Service Experience (ISE), a measure that was designed to assess the extent to which they felt supported by family, friends, and the organizations with which they worked; and the extent to which they experienced positive outcomes (e.g., enhanced skills, a feeling of “having made a difference”) in their community service setting. Students who had a more supportive and positive experience, as assessed by the ISE, were more likely to have continued to work as volunteers in the setting 2 months after they had completed their course requirements. The implications of these results for community service programs are discussed.