Risk strategy under task complexity: a multivariate analysis of behaviour in a naturalistic setting

This study complements the existing literature on decision-making processes and outcomes in complex settings by exploring the impact of different types of complexity on risk strategies in a naturalistic setting. The study analyses a large sample of decisions made by individuals in UK offcourse betting markets, a fertile environment for observing both a variety of risk strategies and a range of task complexities. Specifically, the investigation focuses on the comparative impacts of complexity defined in terms, respectively, of alternatives and attributes. The results suggest that the risk strategy employed is affected by task complexity. Complexity does not affect the size of risk accepted but alternative- and attribute-based complexity together influence the propensity to accept greater degrees of risk. In addition, the effect of attribute-based complexity on risk taking appears to be modified by the use of risk-hedging strategies. The results are observed to corroborate some earlier work on decision process and outcome; where differences with earlier findings are identified, some possible explanations are offered. © 1998 John Wiley & Sons, Ltd.     

Relationship Between Private Religious Activity and Physical Functioning in Older Adults

This study sought to further understand the relationship between physical functioning and use of private religious activity in older adults. Subjects were age 65 or older from urban and rural counties in North Carolina who participated in the Duke University Established Populations for Epidemiologic Studies of the Elderly (Duke/EPESE). A total of 3,851 subjects responded to a question that inquired about their use of prayer, meditation, or Bible reading in 1986. Their response was correlated to number of impairments in activities of daily living (ADLs) (n = 3,791). Subjects who indicated use of private religious activity either dailyor neverhad the greatest number of impairments. Those who prayed or meditated one time per weekhad the least number of impairments. This cross-sectional finding is explained in terms of both changes in private religious activity in response to increasing physical disability and changes in physical disability in response to private religious activity. Previous research has found that prayer is often used as an effective coping mechanism with various sicknesses and chronic conditions. Further studies are needed to examine older individuals' health over time and evaluate their use of private religious activity to see its impact over time on physical disability.     

Effects of Considering Who and Why the Defendant Attacked1

Some people who are accused of a crime admit to the act, but provide an excuse. The effects of an excuse's self‐inflictedness level (high, moderate, or low) and the type of victim attacked (one partially responsible for the defendant's excusing condition, or innocent victim) were investigated. After a pretest (N= 26) to choose stimuli, participants (N= 220) read a scenario in which a male attacks another and then, once on trial, gives an excuse for his act. Those giving highly vs. less self‐inflicted excuses were more likely to receive a guilty verdict, received higher guilt level ratings, and tended to receive longer sentences; those who hurt an innocent vs. a partially responsible victim were more likely to be found guilty. In addition, the defendant's sentence was influenced by both the type of victim and the self‐inflictedness level of the excuse. The influence of perceived responsibility for an act on jurors' decisions is discussed     

Fundamentalism and Political Violence: The Case of Paisley and Ulster Evangelicals

One of the dangers of using the term ‘fundamentalism’ for a wide variety of religiously inspired political movements is that it disguises vital differences. This article examines in great detail the involvement of the evangelical Protestant religious and political leader Reverend Ian Paisley in the political violence of Northern Ireland. It concludes that, despite the context apparently encouraging a Protestant jihad, or holy war, Ulster evangelicals are peaceful and law-abiding. Parallels with American fundamentalism are used to raise the question of contrasts to Islamic fundamentalism. It is argued that fundamentalisms differ in their attitudes towards political violence and that the differences are unlikely to be just a matter of circumstance.     

Matching the faces of robbers captured on video

Recent research has shown that unfamiliar face matching from both high‐ and low‐quality closed circuit television video images to photographs is highly prone to error, even when viewpoint and expression are matched as closely as possible. The current experiments made use of a filmed, staged reconstruction of a bank raid that was captured on CCTV and on high‐quality broadcasting video. Experiment 1 tested the ability of members of the public to match actors captured on CCTV to photo‐spreads containing similar‐looking distractors. Further experiments, each testing different groups of subjects, investigated matching ability using both high‐quality photographs (Experiment 2) and broadcast‐quality video material (Experiment 3). Experiment 3 also investigated the effect of disguising hairstyle, and varied whether or not the target was present in the photo line‐up. The results of these experiments confirm those of previous work, that matching the identity of unfamiliar faces is highly fallible, even when high‐quality footage is used. Experiments 4 and 5 tested matching ability using two‐alternative forced‐choice and single‐item verification tasks. Performance remained highly error‐prone even with the simplest question asked. The legal implications of the results are discussed. Copyright © 2001 John Wiley & Sons, Ltd.     

“Rethinking” the Preface of the Tractatus

This paper is principally a re‐evaluation of the meaning of Denken in the puzzling third paragraph of the Preface to Wittgenstein's Tractatus. It shows that there is a uniform misreading of this paragraph throughout the literature and suggests a corrected reading and some of its implications. The paper asserts that the influential “New Wittgenstein” reading of the Preface as containing Wittgenstein's all important “framing” thoughts on the Tractatus, is correct. However it also argues that the anti‐metaphysical reading the New view draws by way of its frame thesis is incorrect since it is still premised on the incorrect reading of the Preface's third paragraph. With the correct reading of the third paragraph, the paper shows the anti‐metaphysical reading of the Tractatus lacks substantive support.     

Individual differences in risk perception versus risk taking: handedness and interhemispheric interaction

Research indicates that right-hemisphere mechanisms are specifically sensitive to and averse to risk. Research also indicates that mixed degree of handedness is associated with increased access to right hemisphere processing. Accordingly, it was predicted that mixed-handers would exhibit greater risk aversion. Participants were presented with various risky activities and were asked to rate (i) the perceived risk, (ii) the perceived benefit, and (iii) their likelihood to engage in each activity. No handedness differences were found for any of these ratings. Regression analyses, however, indicated that the likelihood to engage in risky activities was predicted primarily by the perceived risks in mixed-handers and by the perceived benefits in strong-handers.     

Illusory bands in orientation and spatial frequency: a cortical analog to Mach bands

Illusory bands at a luminance transition in space (ie an edge) are well known. Here we demonstrate illusory bands of enhanced orientations or spatial frequencies at transitions between higher-contrast and lower-contrast image content along the orientation and spatial-frequency dimensions--the dimensions of cortical spatial coding. We conclude that this illusion is a consequence of cortical-level suppression of units of similar orientations and spatial frequencies and serves to aid texture segmentation while providing efficient neural coding.