Application of signal detection theory to perception of differences in line length

This paper is an attempt to specify the equinormal model for application to different tasks which are currently used in psychophysics (i.e. phenomenal report, detection, and 2AFC). The same set of stimuli (pairs of horizontal colinear lines) is presented in procedures which differ by the task, the probability of the signal, and the succession of the stimuli of the set. This approach leads to the specification of the sensorial and the decisional aspects of the model.The data indicate that (1) the sensitivity index d' to differences in line length is the same function of the physical stimulus independently of paradigm, as far as the same task is concerned. However, and according to the predictions, its value becomes larger by a factor of 2 in a two alternative forced choice task; (2) d' increases with stimulus exposure time; (3) latency of responses generally decreases with increasing d', and are dissimilar for correct and incorrect responses; (4) when the temporal succession of the stimuli is random the subject's criterion, x_c, is not chosen to optimize the percentage correct, which would require a dependance of criterion upon stimulus amplitude and prior probabilities.     

Pour une approche contextuelle et clinique de la demande de recrutement : la transformation d’une demande initiale dans une entreprise familiale

Studies of psychology in the work place usually analyse job offers from an explicit and functional point of view, forgetting the more implicit and strategic dimensions associated with them. This activity of recruitment takes into account the understanding of the specific context of the job offer and of the structure of the organisation which is looking to recruit. The clinical case study described here takes into consideration these contextual elements of very small company and proposes recruitment methods which include a third party, emphasising the particular role of psychologists or consultancies as recruitment advisers.     

Detecting local convexity on the pareto surface

Recent regain in interest in multi‐criteria optimization approaches to provide a designer with multiple solutions to select from and support decisions has led to various methodologies to generate such solutions and possibly approximate the Pareto set. This paper introduces the notions of H‐ and w‐convexities, and develops a simple method to identify local convexity of Pareto hyper‐surfaces since their shape can dictate the choice of the method to use to obtain Pareto solutions and possibly to build an approximation of that set. The method is based on comparing the results from the weighting method to those of the Tchebycheff method at any point on the Pareto hyper‐surface. If, under some conditions, the points obtained from the two methods are identical or not, a local convexity or its lack can be assumed at that location and in its immediate neighbourhood. A numerical example is included. Copyright © 2002 John Wiley & Sons, Ltd.     

Action research,emancipation and design thinking

This article evaluates the notion and practice of action research, as defined by contributors to the recent special issue ‘Action Research and Emancipation’ in this journal. The author argues that, although action research implicitly has a design orientation, it largely draws on the humanities and sciences as its main role models. As a result, action researchers nowadays do not see themselves as design professionals. Idealized design methods serve to illustrate how design research can help realize the emancipatory intentions of action researchers. Copyright © 2004 John Wiley & Sons, Ltd.     

THE PSYCHODYNAMICS OF ORGASM

Orgasm itself, along with its specific psycho dynamic, has stimulated few reflections and little research in the psychoanalyticalfield to date. In this regard, perspectives relating to orgasm are generally placed within a wider context covering desire, arousal and, of course, satisfaction. Freud himself seemed to show no particular or systematic interest in an orgasmic psychodynamic per se. This article, the aim of which is to consider the specific nature of orgasm, proposes a two-stage reflection. First, it considers the specific aspects of orgasm in order to arrive at a phenomenology of the orgasm itself-within a clearly defined framework. Second, it explains this phenomenology from a psychoanalytical point of view. These reflections lead us to suggest that while the erogenous zones in men and women respectively are at the root of the sexual arousal that leads to orgasm, it is most probably in fantasy that the female orgasm finds its major trigger. This is all the more relevant given that the existence of a real qualitative difference between clitoral and vaginal orgasm is now being challenged. This would tend to confirm the idea of a predominance of fantasy over bodily location, given that, quite clearly, it is not possible to attribute the former role to a precise area of the body. In this respect, only the analytical process is able to lead us to the primary sources of orgasmic problems—both male and female—and, above all, to reconstruct the origin of a satisfactory or unsatisfactory orgasm.     

What is Debate for? The Rationality of Tibetan Debates and the Role of Humor

In this essay, I examine the mode of operation and aim of debates in the Tibetan Buddhist traditions. I contrast the probative form of argument that was privileged by the Indian tradition to the more agonic practice favored by Tibetan scholastics. I also examine the rules that preside over this dialectical practice, which is seen by the Tibetan tradition as essential to a proper scholastic education. I argue, however, that the practice of debates cannot be reduced to this dialectical model, for it has an important performative aspect not easily encompassed by the rules. I examine this aspect of Tibetan debates, focusing particularly on the role of humor. I conclude with a few remarks on the type of rationality entailed by the importance of humor and of other rhetorical elements involved in Tibetan debates.

Computerized procedure for analyzing hand kinematics with a peg-moving task (Sarah-Pegworks)

This article describes Sarah-Pegworks, a computerized procedure for analyzing hand kinematics based on the peg-moving task. The procedure, developed in Visual Basic 6 programming language, includes (1) processing raw data from an infrared motion-tracking system, (2) identifying movement components, and (3) analyzing and presenting hand kinematic information in numerical and graphic outputs. Fifty-five normal adults set the parameters relative to filtering and movement identification. A case was presented to illustrate the clinical value of this procedure.