The handicap principle is one of the most influential ideas in evolutionary biology. It asserts that when there is conflict of interest in a signaling interaction signals must be costly in order to be reliable. While in evolutionary biology it is a common practice to distinguish between indexes and fakable signals, we argue this dichotomy is an artifact of existing popular signaling models. Once this distinction is abandoned, we show one cannot adequately understand signaling behavior by focusing solely on cost. (...) Under our reframing, cost becomes one—and probably not the most important—of a collection of factors preventing deception. (shrink)

Physical activity and sedentary behaviour have been linked to the mental health of children and adolescents, yet the timing of behaviours may play a role in this relationship and clarifying this could inform interventions. We explored cross-sectional associations of PA and SED in varying time segments throughout the school day with the mental health of school-aged children and adolescents from rural Northeastern Ontario, Canada. A total of 161 students wore accelerometers for 8 days and completed a self-report survey. Mental health (...) was measured using the Strengths and Difficulties Questionnaire. Accelerometer-measured SED, light PA, and moderate and vigorous PA were estimated in the time-segments before school, school time, after school, and evenings. Associations were tested with multilevel linear regressions while adjusting for confounding factors. Students spent 72.6 min in MVPA, 209.0 min in LPA, and 621.0 min in SED per day. Daily SED was associated with less conduct problems. Evening LPA was inversely associated with hyperactivity, while SED was associated with hyperactivity and with peer problems before school, and during school. No associations were observed for MVPA, emotional symptoms, or prosocial behaviour. In conclusion, displacing SED with LPA in some specific periods of the day may benefit the mental health of students; taking this into account could strengthen interventions. (shrink)

The book begins with a discussion of the debates on history education as they developed in Great Britain during the last decades of the previous century. In these debates, reference is often made to the views of the philosopher and historian R. G. Collingwood. However, according to the author, his philosophy of history is usually misunderstood. Besides correcting the various misinterpretations of Collingwood's views on history, special attention is paid to his theory of (historical) imagination. In the final part of (...) the book, the relevance of Collingwood's philosophy for more general educational issues is discussed and compared with the views of Hirst, Bloom and Bruner. (shrink)

I have based my psychological hypotheses on studies in perception and in personality. Research in these two areas began independently, but by the late forties the supposedly unconnected processes came to be seen as different aspects of one process. For instance, a low tolerance for perceptual ambiguity and cognitive dissonance was found to be significantly correlated with lack of emotional responsiveness, dogmatism, and authoritarianism; conversely, a high tolerance for perceptual ambiguity and cognitive dissonance was found to be significantly correlated with (...) tolerance of emotional ambivalence, openness to new experience, and a liberal world view.1 Later studies, primarily those conducted in the sixties, then established strong correlations between these findings and information-processing styles. Information processing involves three stages: first, stimuli are selected from the environment ; these stimuli are then arranged into "dimensions"; finally, if two or more dimensions result, they are compared and/or combined according to certain rules. H. M. Schroder and his colleagues have established correlations between personality styles and styles of information processing.2 For example, an intolerant personality—that is, one with a low integration index—"identifies and organizes stimuli in a fixed way, and the rules derived from existing schemata are explicit in defining this one way" . What psychologists call an "abstract personality" and identify in terms of "flexibility" or "tolerance of ambiguity"—what in literary studies is most conveniently called "negative capability"—is not necessarily characterized as lacking rules but rather as possessing a greater number of conflicting rules on a lower level which may be accommodated by rules on a higher level. · 1. See Jerome S. Bruner and David Krech, eds., Perception and Personality, 2nd ed. and Robert R. Blake and Glenn V. Ramsey, eds., Perception: An Approach to Personality . Although, as Else Frenkel-Brunswick says, "rigidity in one respect may go with flexibility in another," she also adds: "There is some indication that in the case of distinct intolerance of emotional ambivalence one may as a rule be able to locate at least some aspects of intolerance of cognitive ambiguity although these may often be more apparent on a higher level than that of perception proper" The present essay, since it is one section of a projected larger study, deals with the issues inherent in this approach in only a limited fashion. One could, for instance, quote whole essays in this branch of psychology dealing with ambiguity and point to their relevance for some aspects of literary study and the teaching of literature. Ambiguity, of course, is also a central term in New Criticism. See William Empson, Seven Types of Ambiguity and Ernst Kris and Abraham Kaplan, "Aesthetic Ambiguity," in Psychoanalytic Explorations in Art, ed. Kris , pp. 243-64.· 2. H. M. Schroder, M. J. Driver, and S. Streufert, "Levels of Information Processing," in Thought and Personality, ed. Peter B. Warr , pp. 174-91. All citations to this work will appear in the text. Reuven Tsur, senior lecturer in Hebrew literature at Tel-Aviv University, is the author of several books in Hebrew on medieval and modern Hebrew poetry and, in English, A Perception-Oriented Theory of Metre. (shrink)

Doll, R. C. Foreword.--Conant, J. B. The education of American teachers.--Holt, J. How children fail.--Dewey, J. Democracy and education.--Whitehead, A. N. The aims of education.--Goodman, P. Compulsory mis-education.--Erikson, E. H. Childhood and society.--Rogers, C. R. On becoming a person.--Bruner, J. S. The process of education.--Silberman, C. E. Crisis in the classroom.

In this work I attempt to articulate a principle or set of principles that can guide violent revolution, or emancipatory violence, and yet still prevent the end-stage backlash that generally follows; e.g., the Terror's culmination in which the originators are the targets of the Terror.

Michael Walzer is one of the world's most important political thinkers. In this book, Toby J. Reiner provides the most wide-ranging and up-to-date introduction to his work available. Examining Walzer's multivarious writings and work, Reiner develops an illuminating new interpretation of his thought that no political theorist can afford to miss.