Use of the Compulsive Exercise Test With Athletes: Norms and Links With Eating Psychopathology

This study assessed the 5-factor structure of the Compulsive Exercise Test (CET) and explored the relationship between compulsive exercise and eating psychopathology in athletes. Confirmatory and exploratory factor analyses of the CET were conducted with 689 competitive athletes (18–35 years of age). Convergent validity with the Eating Disorders Examination Questionnaire (EDE-Q) was explored. The 5-factor structure showed a poor fit; an alternative 3-factor structure is proposed. Exercising for weight control and exercising to avoid a negative mood were strongly associated with eating psychopathology. Implications for using the CET with athletes are discussed.     

Objective assessment of the functional role of spike train correlations using information measures

The functional role of correlations between neuronal spike trains remains strongly debated. This debate partly stems from the lack of a standardized analysis technique capable of accurately quantifying the role of correlations in stimulus encoding. We believe that information theoretic measures may represent an objective method for analysing the functional role of neuronal correlations. Here we show that information analysis of pairs of spike trains allows the information content present in the firing rate to be disambiguated from any extra information that may be present in the temporal relationships of the two spike trains. We validate and illustrate the method by applying it to simulated data with variable degrees of known synchrony, and by applying it to recordings from pairs of sites in the primary visual cortex of anaesthetized cats. We discuss the importance of information theoretic analysis in elucidating the neuronal mechanisms underlying object identification.     

A critical review of congenital phantom limb cases and a developmental theory for the basis of body image

Reports of phantom limbs amongst aplasics (i.e., subjects who congenitally lack one or several limbs) have often been presented as evidence that body image is 'hard-wired' in the brain and that neither sensory input nor proprioceptive feedback are essential to its formation. Although attempts have been made to account for these phantoms by other means, these have been on a case by case basis and no satisfactory alternative framework has been proposed. This paper collates the accounts of aplasic phantoms and presents them as compatible with a four-part hypothesis, in which body image is learnt from experience during both pre- and post-natal development, and in which cross-cortical connections and mirror neurons play prominent roles. This model unites several previously disparate theories to offer a viable solution to several longstanding phantom limb mysteries and serves to highlight avenues worthy of further inquiry.     

Should We Agree to Disagree? The Multilevel Moderated Relationship Between Safety Climate Strength And Individual Safety Motivation

Organisational research investigating climate perceptions often use constructs reflecting dispersion and disagreement, termed ‘climate strength’, to investigate situational pressures on behaviour expression. Within safety-specific contexts, research has tended to emphasise the prediction of climate strength rather than an examination of its effects on behaviour. The present paper investigates the important first pathway in the prediction of safety behaviour by investigating the influence of safety climate strength on the relationship between safety climate perceptions and individual safety motivation in a safety critical context using multilevel analyses. Contrary to expectations, results initially indicated that safety climate strength negatively influenced the relationship between safety climate perceptions and safety motivation, such that greater variability was associated with greater motivation. Post hoc analysis re-grouping responses into broader functional levels found support for an interaction, suggesting a difference in the scope of influence for safety climate strength between the two levels of analysis. These findings are discussed in light of self-determination theory, and suggestions for future research and practice made.

     

Blackburn and the war on error

Book Information World Without Design: The Ontological Consequences of Naturalism. World Without Design: The Ontological Consequences of Naturalism Michael Rea, Oxford: Clarendon Press, 2002, pp. viii + 245, US$35.00 (cloth). By Michael Rea. Oxford: Clarendon Press. Pp. viii + 245. US$35.00 (cloth:),     

Ramsey and Joyce on deliberation and prediction

Synthese - Can an agent deliberating about an action A hold a meaningful credence that she will do A? ‘No’, say some authors, for ‘deliberation crowds out prediction’...