The Effects of Uncontrollable, Unpredictable Aversive and Appetitive Events: Similar Effects Warrant Similar, but not Identical, Explanations?

Exposure to uncontrollable, unpredictable appetitive events produces a variety of cognitive debilitations and vegetative changes, as does exposure to uncontrollable, unpredictable aversive events. Similarities include impaired escape from aversive events, impaired discrimination, finicky consumption, analgesia, and body weight loss. However, in stark contrast, uncontrollable aversive stress causes reduced motor activity where as similar appetitive treatment does not; aversively induced debilitation is causally related to energy regulation, whereas the appetitively induced effects are not. Parallel mechanisms are suggested to explain these effects in terms of a revised anxiety account of the aversive effects, and a frustration account of the appetitive effects. Finally, factors likely to limit important research to resolve the many remaining issues are identified: negative presentation of animal research, political decision making, and ignorance and fear in committees which review the ethics of research.     

A systematic investigation of the differential predictors for speeding,drink-driving,driving while fatigued,and not wearing a seat belt,among young drivers

Risky driving has been identified as a key contributor to road crashes. Past research suggests that different risky driving behaviours are influenced by different factors, but has not been systematic in its investigation of the factors associated with different behaviours. The present research systematically examined a range of relevant demographic, personality and attitudinal factors (age, gender, sensation seeking, driver anger, time urgency, authority rebellion, perceived relative risk, perceived personal risk, perceived costs, perceived benefits, and peer influence) in the prediction of speeding, drink-driving, driving while fatigued, and not wearing seat belts, for a student sample of young drivers. In addition, relevant mediators of the relationship between gender and risky driving, as well as moderators of the relationship between perceived risk and risky driving, were examined for each of the four behaviours. Results demonstrate that the lists of significant predictors differed between risky driving behaviours. In addition, perceived personal risk was observed to mediate the relationship between gender and driving while fatigued only, and gender was observed to moderate the relationship between perceived risk and risky driving, for drink-driving and not wearing seat belts. Results highlight the importance of designing individual road safety interventions for individual driving behaviours, and suggest factors which might be targeted in younger driver populations.     

The contributions of philosophy: reply to critics of the world philosophy made

Philosophical Studies -     

Type A behaviour pattern and attentional bias in relation to anger/hostility, achievement, and failure

Type A subjects are characterised by dysfunctional cognitions related to themes of competitiveness, achievement, and hostility. The present experiment investigated attentional biases for words relevant to the content of these dysfunctional schemata in Type A individuals. After completing the MMPI-2 Type A Scale, subjects completed two alternative versions of a visual probe detection task (administered 4–12 days apart) which contained achievement, failure, and anger/hostility/aggression related words. Prior to testing at time 1, subjects were told that the purpose of the procedure was to collect normative data only. Prior to testing at time 2, subjects were told that performance on the test was known to be closely related to IQ and that they could compare their performance with that of other subjects following completion of the task. Type A subjects directed attention towards anger/hostility/aggression words under low performance motivation conditions but away from such words under high performance motivation conditions. Type A subjects also showed less selective attention to failure words than Type B subjects, and no group differences were detected for achievement related words. The results are discussed with reference to models of dysfunctional cognitive processing, and the role of anger/hostility, in particular, in Type A personality.     

No class: Russell on contextual definition and the elimination of sets

The article rebutts Michael Kremer’s contention that Russell’s contextual definition of set-theoretic language in Principia Mathematica constituted the ontological achievement of eliminating commitment to classes. Although Russell’s higher-order quantifiers, used in the definition, need not range over classes, none of the plausible substitutes provide a solid basis for eliminating them. This point is used to defend the presentation, in The Dawn of Analysis, of Russell’s logicist reduction, using a first-order version of naive set theory.