Presence as determined by fractal perceptual-motor dynamics.

This paper presents a tentative model of the role of perceptual-motor dynamics in the emergence of the feeling of presence. A new method allowing the measure of how gaze probes three-dimensional space in immersion is used to support this model. Fractal computations of gaze behavior are shown to be more effective than standard computations of eye movements in predicting presence.     

Orientation in the cuttlefish <Emphasis Type="Italic">Sepia officinalis</Emphasis>: response <Emphasis Type="Italic">versus</Emphasis> place learning

Several studies have demonstrated that mammals, birds and fish use comparable spatial learning strategies. Unfortunately, except in insects, few studies have investigated spatial learning mechanisms in invertebrates. Our study aimed to identify the strategies used by cuttlefish (Sepia officinalis) to solve a spatial task commonly used with vertebrates. A new spatial learning procedure using a T-maze was designed. In this maze, the cuttlefish learned how to enter a dark and sandy compartment. A preliminary test confirmed that individual cuttlefish showed an untrained side-turning preference (preference for turning right or left) in the T-maze. This preference could be reliably detected in a single probe trial. In the following two experiments, each individual was trained to enter the compartment opposite to its side-turning preference. In Experiment 1, distal visual cues were provided around the maze. In Experiment 2, the T-maze was surrounded by curtains and two proximal visual cues were provided above the apparatus. In both experiments, after acquisition, strategies used by cuttlefish to orient in the T-maze were tested by creating a conflict between the formerly rewarded algorithmic behaviour (turn, response learning) and the visual cues identifying the goal (place learning). Most cuttlefish relied on response learning in Experiment 1; the two strategies were used equally often in Experiment 2. In these experiments, the salience of cues provided during the experiment determined whether cuttlefish used response or place learning to solve this spatial task. Our study demonstrates for the first time the presence of multiple spatial strategies in cuttlefish that appear to closely parallel those described in vertebrates.     

Jobs Commensurate With Their Skills? Selected Workers and Skilled Job Access in Québec

The ability of recent landed immigrants to find employment that is commensurate with their skills is a frequent subject of debate. This article analyses one dimension of this phenomenon: namely, how well does post-landing employment correlate to pre-landing levels of education as measured through the Québec selection grid. The analysis is done through a longitudinal retrospective survey of a probabilistic sample of principal applicants from the economic class admitted to Québec between January 1997 and June 2000. In order to better measure the condition of immigrants at their time of arrival, the results of the survey are analysed along with the administrative data taken from Québec’s selection grid and the confirmation of permanent residence. This article analyses the speed of the requalification that the members of the economic class undertake. This analysis attempts to answer two questions: Is the level attained by the cohort normal? At what speed do these immigrants attain these expected outcomes?     

Herding by attribution of privileged information

We study a situation where agents take extreme actions and how these actions are imitated by others. First, Experiment 1 showed that an expert first mover had an advantage in obtaining herding by others on his investment decision, when compared to a non‐expert first mover. Experiment 2 showed that this advantage only appeared when the first mover's investment was out‐of‐the‐ordinary (in fact, highly aberrant). We obtained the same level of herding in Experiment 3 when the first mover had privileged information, instead of being an expert. Second, Experiment 4 showed that when people observed the same out‐of‐the‐ordinary investment and did not know whether the first mover had privileged information or not, they herded on him as if he had privileged information. In fact, our data revealed that participants thought that the unknown first mover had privileged information. Furthermore, herding was statistically indistinguishable from the condition where observers knew unambiguously that the first mover had privileged information. Copyright © 2008 John Wiley & Sons, Ltd.     

Le jugement clinique en contexte d’évaluation du potentiel et des compétences au travail : Quelle est sa valeur prédictive et peut-il être formalisé ?

This study intends (1) to investigate the predictive validity of clinical (integrative) judgement based on personality data collected in psychological assessment and (2) to verify the capacity of assessors to formalize their judgment in a standardised algorithm. Three psychologists had the task to predict results of 78 managers on multisource assessment measuring two performance criteria (results orientation and relationship building). Results show that the psychologists’ integrative judgement predicts one of performance criteria up to .39. However, it appears that the standardisation of their judgment in mechanic decision rules was less predictive of performance criteria than their global clinical judgement. Overall, this research suggests there is still much to understand in the interpretative process.     

Similarity and binding in memory: bound to be detrimental

The process of binding information from different modalities and sources into an object is ubiquitous in cognition and has been a problem for research and modelling efforts in psychology. This process has been considered by most researchers as necessarily always beneficial to memory. In the present study we provide evidence that binding can be detrimental through the propagation of vulnerabilities to interference. Phonologically similar and dissimilar letters were presented sequentially at different locations on a computer monitor. Participants had to recall either the letters in their order of presentation or the spatial locations at which the letters had appeared. Whether binding was encouraged or not--providing prior knowledge of which dimension to remember--phonological similarity had a detrimental effect on recall of locations. Such a finding poses a challenge to the view that binding is the panacea in enhancing memory capacity.     

Solving the chicken-and-egg problem of letter detection and fixation duration in reading

When asked to detect target letters while reading a text, participants miss more letters in frequent function words than in less frequent content words. According to the truncation assumption that characterizes most models of this effect, misses occur when word-processing time is shorter than letter-processing time. Fixation durations for detections and omissions were compared with fixation durations from a baseline condition when participants were searching for a target letter embedded in different words. Although, as predicted by truncation, fixation durations were longer for detections than for omissions, fixation durations for detections were also longer than those for the same words in the baseline condition, demonstrating that longer fixation durations when targets are detected are more likely to be due to demands associated with producing a detection response than to truncation. Also, contrary to predictions from the truncation assumption, the standard deviation of fixation durations for detections was larger than that from the baseline condition.     

Who Pays for Providing Spiritual Care in Healthcare Settings? The Ethical Dilemma of Taxpayers Funding Holistic Healthcare and the First Amendment Requirement for Separation of Church and State

All US governmental, public, and private healthcare facilities and their staff fall under some form of regulatory requirement to provide opportunities for spiritual health assessment and care as a component of holistic healthcare. As often the case with regulations, these facilities face the predicament of funding un-reimbursable care. However, chaplains and nurses who provide most patient spiritual care are paid using funds the facility obtains from patients, private, and public sources. Furthermore, Veteran healthcare services, under the United States Department of Veterans Affairs (VA), are provided with taxpayer funds from local, state, and federal governments. With the recent legal action by the Freedom From Religion Foundation, Inc. (FFRF) against the Veterans Administration, the ethical dilemma surfaces between taxpayers funding holistic healthcare and the first amendment requirement for separation of church and state.