Predictors of driving outcomes in advancing age

This study aimed to develop predictive models for real-life driving outcomes in older drivers. Demographics, driving history, on-road driving errors, and performance on visual, motor, and neuropsychological test scores at baseline were assessed in 100 older drivers (ages 65-89 years [72.7]). These variables were used to predict time to driving cessation, first moving violation, or crash. Using Cox proportional hazards regression models, significant individual predictors for driving cessation were greater age and poorer scores on Near Visual Acuity, Contrast Sensitivity, Useful Field of View, Judgment of Line Orientation, Trail Making Test-Part A, Benton Visual Retention Test, Grooved Pegboard, and a composite index of overall cognitive ability. Greater weekly mileage, higher education, and "serious" on-road errors predicted moving violations. Poorer scores from Trail Making Test-Part B or Trail Making Test (B-A) and serious on-road errors predicted crashes. Multivariate models using "off-road" predictors revealed (a) age and Contrast Sensitivity as best predictors for driving cessation; (b) education, weekly mileage, and Auditory Verbal Learning Task-Recall for moving violations; and (c) education, number of crashes over the past year, Auditory Verbal Learning Task-Recall, and Trail Making Test (B-A) for crashes. Diminished visual, motor, and cognitive abilities in older drivers can be easily and noninvasively monitored with standardized off-road tests, and performances on these measures predict involvement in motor vehicle crashes and driving cessation, even in the absence of a neurological disorder. (PsycINFO Database Record (c) 2012 APA, all rights reserved).     

Using game theory to examine incentives in influenza vaccination behavior

The social good often depends on the altruistic behavior of specific individuals. For example, epidemiological studies of influenza indicate that elderly individuals, who face the highest mortality risk, are best protected by vaccination of young individuals, who contribute most to disease transmission. To examine the conditions under which young people would get vaccinated to protect elderly people, we conducted a game-theory experiment that mirrored real-world influenza transmission, with "young" players contributing more than "elderly" players to herd immunity. Participants could spend points to get vaccinated and reduce the risk of influenza. When players were paid according to individual point totals, more elderly than young players got vaccinated, a finding consistent with the Nash equilibrium predicting self-interested behavior. When players were paid according to group point totals, however, more young than elderly players got vaccinated-a finding consistent with the utilitarian equilibrium predicting group-optimal behavior-which resulted in higher point totals than when players were paid for their individual totals. Thus, payout structure affected whether individuals got vaccinated for self-interest or group benefit.     

How to be proactive about interference: lessons from animal memory

Processes of proactive interference were explored using the pigeon as a model system of memory. This study shows that proactive interference extends back in time at least 16 trials (and as many minutes), revealing a continuum of interference and providing a framework for studying memory. Pigeons were tested in a delayed same/different task containing trial-unique pictures. On interference trials, sample pictures from previous trials reappeared as test pictures on different trials. Proactive-interference functions showed greatest interference from the most recent trial and with the longer of two delays (10 s vs. 1 s). These interference functions are accounted for by a time-estimation model based on signal detection theory. The model predicts that accuracy at test is determined solely by the ratio of the elapsed time since the offset of the current-trial sample to the elapsed time since the offset of the interfering sample. Implications for comparing memory of different species and different types of memory (e.g., familiarity vs. recollection) are discussed.     

Sex differences for the recognition of direct versus averted gaze faces

Gaze direction plays a central role in face recognition. Previous research suggests that faces with direct gaze are better remembered than faces with averted gaze. We compared recognition of faces with direct versus averted gaze in male versus female participants. A total of 52 adults (23 females, 29 males) and 46 children (25 females, 21 males) completed a computerised task that assessed their recognition of faces with direct gaze and faces with averted gaze. Adult male participants showed superior recognition of faces with direct gaze compared to faces with averted gaze. There was no difference between recognition of direct and averted gaze faces for the adult female participants. Children did not demonstrate this sex difference; rather, both male and female youth participants showed better recognition of faces with direct gaze compared to averted gaze. A large body of previous research has revealed superior recognition of faces with direct, compared to averted gaze. However, relatively few studies have examined sex differences. Our findings suggest that gaze direction has differential effects on face recognition for adult males and females, but not for children. These findings have implications for previous explanations of better recognition for direct versus averted gaze.     

Anesthesiological ethics: can informed consent be implied?

Surgical ethics is a well-recognized field in clinical ethics, distinct from medical ethics. It includes at least a dozen important issues common to surgery that do not exist in internal medicine simply because of the differences in their practices. But until now there has been a tendency to include ethical issues of anesthesiology as a part of surgical ethics. This may mask the importance of ethical issues in anesthesiology, and even help perpetuate an unfortunate view that surgeons are "captain of the ship" in the operating theater (leaving anesthesiologists in a subservient role). We will have a better ethical understanding if we see surgery and anesthesia as two equal partners, ethically as well as in terms of patient care. Informed consent is one such issue, but it is not limited to that. Even on the topic of what type of anesthesia to use, anesthesiologists have often felt subsumed to the surgeon's preferences. This commentary takes the case study and uses it as a exemplar for this very claim: it is time to give due recognition for a new field in clinical ethics, ethics in anesthesia.     

Species are Processes: A Solution to the ‘Species Problem’ via an Extension of Ulanowicz’s Ecological Metaphysics

The ??species problem?? in the philosophy of biology concerns the nature of species. Various solutions have been proposed, including arguments that species are sets, classes, natural kinds, individuals, and homeostatic property clusters. These proposals parallel debates in ecology as to the ontology and metaphysics of populations, communities and ecosystems. A new solution??that species are processes??is proposed and defended, based on Robert Ulanowicz??s metaphysics of process ecology. As with ecological systems, species can be understood as emergent, autocatalytic systems with propensities for centripetality and mutuality in the course of dynamically balancing ascendency (order and persistence) and overhead (randomness and change). The species-as-processes perspective accords with the Ulanowicz??s postulates of process ecology and it can be accommodated by existing theories of species??particularly in a reframing of Richard Boyd??s metaphysics such that species are homeostatic process clusters. Rather than contending that process-based metaphysics is the only, best or true account of species, a pluralist-realist approach is advocated based on the pragmatic principles that are reflected in modern view of species and ecology. If species are understood to be comprised of processes and to be emergent processes themselves, there are important implications for the life sciences, including: animal models in medical and environmental studies, conservation biology, extinction, biodiversity, restoration ecology, and evolutionary biology.     

School barricaded captive-taking: A literature review and critique

Although schools are among the safest places for children and youth, they are the occasional site of violent behavior. One form of violence is the barricaded-hostage event. In this article, the authors review the research literature pertaining to these events. Specifically, studies examining the impact on direct and indirect victims, and responders to these events, are presented and critiqued. Recommendations for future research are also made, followed by a summary and conclusions.     

Does Moral Virtue Require Knowledge? A Response to Julia Driver

A long-standing tenet of virtue theory is that moral virtue and knowledge are connected in some important way. Julia Driver attacks the traditional assumption that virtue requires knowledge. I argue that the examples of virtues of ignorance Driver offers are not compelling and that the idea that knowledge is required for virtue has been taken to be foundational for virtue theory for good reason. I propose that we understand modesty as involving three conditions: 1) having genuine accomplishments, 2) being aware of the value of these accomplishments, and 3) having a disposition to refrain from putting forward one’s accomplishments. When we understand modesty this way, we can properly identify genuine cases of modesty and see how modesty requires knowledge. Something similar can be said about other alleged virtues of ignorance. With the proposal in place, we have no serious reason to think that moral virtue requires ignorance. Additionally, we have good reasons for thinking that acting virtuously requires having good intentions and that a necessary condition of having a virtue is having knowledge. Although some might take these results to be trivial or obviously true, I think the Julia Driver’s challenge should not be dismissed out of hand. Even though there are some reasons for thinking that some situations suggest that knowledge and virtue can be separated from one another, close analysis reveals this impression is only surface deep.     

Knowledge,beliefs, peer norms,and past behaviors as correlates of risky sexual behaviors among college students

Abstract

HIV/AIDS knowledge, age at onset of sexual activity, perceptions of personal risk and peer norms were explored as correlates for risky sexual behaviors among college students. Ninety-nine male and 185 female college students completed a 66-item questionnaire. A majority reported being sexually active with most in mutually monogamous relationships or not currently in a sexual relationship. Multiple regression correlation analyses showed knowledge about HIV/AIDS to be very high but that this knowledge did not independently relate to the extent of risky behaviors. Perceptions of risk were positively related to number of partners and single-time partners but not condom usage. In contrast to previous studies, perceived peer norms did not independently relate to behaviors. Instead, age at first intercourse was found to have substantial overlap with current perceptions, attitudes, and likelihood for engaging in risky behaviors. The necessity for including previous behaviors in analyses of the impact of attitudes and perceived norms on behavioral intentions is discussed.