Reorientation in the real world: the development of landmark use and integration in a natural environment

An influential series of studies have argued that young children are unable to use landmark information to reorient. However, these studies have used artificial experimental environments that may lead to an underestimation of the children’s ability. We tested whether young children could reorient using landmarks in an ecologically valid setting. Children aged between 3 and 7 years completed a reorientation task in open parkland, and the properties of the search array (size and distinctiveness) were manipulated in a within-subjects design. Responses were recorded using Global Positioning Systems technology. All age groups performed above chance level, demonstrating that young children can reorient using natural landmarks. This behaviour was modulated by the nature of the search array: children were more accurate when the locations were spaced in a large array, and when the search locations were distinctively coloured. This suggests that the integration between landmarks and search locations, at different spatial scales, is a key factor in characterising human reorientation in the real world.     

Are curves detected by 'curvature detectors'?

Five experiments which attempted to evaluate the relationship between orientation and curvature selectivity in human vision are described. In the first two experiments, threshold elevation for curved gratings was measured after exposure to similar gratings, with the use of either an adaptation (experiment 1) or a masking (experiment 2) paradigm. In both experiments threshold elevation occurred which was selective for both the degree and the direction of curvature of the adapting pattern. Experiment 3 compared the effects of adapting to tilted rectilinear or vertical curved gratings upon threshold for a vertical rectilinear grating. Threshold elevation declined systematically as the adapting gratings were either tilted or made more curved. Experiment 4 measured curvature selectivity as a function of the orientation of a curved adapting grating. Threshold elevation declined as the adapting grating was tilted more, but curvature selectivity remained. Experiment 5 measured the orientation tuning for curved gratings directly. Threshold elevation declined to 50% of its maximum value at an adpating orientation of about 28 degrees. This was constant for all values of curvature used. The resulsts are discussed with reference to the question of whether the human visual system contains 'curvature detectors' or linear-contour detectors which respond to the tangents of curves.     

Relation of game location and experience on mood states

The study investigated relationships between game location, performers' experience, and mood states. 31 experienced collegiate soccer players completed the Brunel Mood Scale to assess anger, calmness, confusion, depression, fatigue, happiness, tension, and vigor before eight competitive games (four home and four away). Participants were categorized into Experienced and Less Experienced groups, based on the level of performance at which they played. Repeated-measures multivariate analyses of variance compared mean mood scores across location and experience, and follow-up univariate analyses suggested the increase in mood scores on Tension and decrease in scores on Calmness, Happiness, and Vigor between playing away and at home were significantly greater for Less experienced soccer players than Experienced players. Implications of these findings for the applied practitioner are discussed.     

Ontotheology? Understanding Heidegger's Destruktion of Metaphysics

Heidegger's Destruktion of the metaphysical tradition leads him to the view that all Western metaphysical systems make foundational claims best understood as 'ontotheological'. Metaphysics establishes the conceptual parameters of intelligibility by ontologically grounding and theologically legitimating our changing historical sense of what is. By first elucidating and then problematizing Heidegger's claim that all Western metaphysics shares this ontotheological structure, I reconstruct the most important components of the original and provocative account of the history of metaphysics that Heidegger gives in support of his idiosyncratic understanding of metaphysics. Arguing that this historical narrative generates the critical force of Heidegger's larger philosophical project (namely, his attempt to find a path beyond our own nihilistic Nietzschean age), I conclude by briefly showing how Heidegger's return to the inception of Western metaphysics allows him to uncover two important aspects of Being's pre-metaphysical phenomenological self-manifestation, aspects which have long been buried beneath the metaphysical tradition but which are crucial to Heidegger's attempt to move beyond our late-modern, Nietzschean impasse.     

Defining and Understanding Mental Toughness within Soccer

This study examined the frequency of observed prosocial and antisocial behaviors in soccer teams, age differences in observed behaviors and motivational variables, and whether motivational variables account for age differences in observed behaviors. Participants were 313 adolescent soccer players, recruited from three age groups: under 13, under 15, and under 17. Each age group was represented by eight teams. Players were filmed during a game and completed questionnaires after the game. Videotaped games were analyzed by two observers, who recorded behaviors for each team rather than each individual player; therefore, all data were analyzed only at the group level. Observed antisocial behaviors were more frequent than prosocial ones. Significant differences were also identified among the three age groups with the oldest group displaying more frequent antisocial and less frequent prosocial behaviors and perceiving a stronger performance climate and a weaker mastery climate in their team compared to the two younger groups. A series of ANCOVAs using motivational variables as covariates indicated that mastery climate followed by performance climate accounted for the largest decrease in the variance of both prosocial and antisocial behaviors attributed to the age group factor. The findings are discussed in terms of their implications for promoting fair play in sport.     

Fear of Success,Need Achievement,and Fear of Failure: A factor analytic study

Several tests of Fear of Success (FOS), Fear of Failure (FOF), and Need Achievement (nAch), plus Taylor's Manifest Anxiety Scale and a social desirability scale were administered to 104 males and 101 females. FOS, FOF, and nAch did not show factor validity. Results for predictive validity were also poor. Anxiety defined the first factor in the factor analysis. All first-factor tests negatively predicted female grade point average and American College Test scores. All the first-factor tests showed sex differences, with females scoring higher. A clarifying role for anxiety in the study of sex differences in achievement is indicated.     

The assessment of obsessionality using the Padua inventory: its validity in a British non-clinical sample

The Padua Inventory (PI) is a measure of obsessive–compulsive phenomena, which permits measurement of both number and severity of symptoms. Data is available from Italy, the US, the Netherlands and Australia on non-clinical samples. The present study provides a psychometric evaluation of the PI on a British non-clinical sample (N=1855). Comparisons are made with other data and further suggestions for the use of the PI are made. Results from the present study indicate that the PI has similar, though not identical, factor structure to previous studies, adequate internal reliability and construct validity. Four factors emerged, containing clusters of items broadly relating to ‘impaired control over mental activities/doubting', ‘contamination', ‘checking' and ‘worries about losing control over motor behaviour' and these included most of the items loading on the same factors in earlier studies together with additional items.The relationships of age and gender with the PI scores are investigated. Differences were found from the Sanavio (1988) [Sanavio, E. (1988). Obsessions and compulsions: the Padua Inventory. Behaviour Research and Therapy, 26, 169–177.] Italian sample. These differences are in keeping with other available data from British samples and other data on the epidemiology of Obsessive Compulsive Disorder. The five factor structure found in the one study using clinical and non-clinical subjects is discussed in relation to the present analyses.     

Externalism and first-person authority

Externalism in the philosophy of mind is threatened by the view that subjects are authoritative with regard to the contents of their own intentional states. If externalism is to be reconciled with first-person authority, two issues need to be addressed: (a) how the non-evidence-based character of knowledge of one's own intentional states is compatible with ignorance of the empirical factors that individuate the contents of those states, and (b) how, given externalism, the non-evidence-based character of such knowledge could place its subject in an authoritative position. This paper endorses a standard strategy for dealing with (a). The bulk of the paper is devoted to (b). The aim is to develop an account of first-person authority for a certain class of intentional states that is capable of explaining (1) why knowledge of one's own intentional states is peculiarly authoritative, and (2) why such authority is compatible with externalism.