Review of Teresa Obolevitch: Faith and Science in Russian Religious Thought

Studies in East European Thought -     

Inducing a Rule in Wason's 2-4-6 Task: A Test of the Information-Quantity and Goal-Complementarity Hypotheses

In the standard 2-4-6 induction task, subjects are instructed to discover the rule generating sequences of three numbers by inventing number triples for which they receive immediate feedback. The rule is “ascending numbers”. Performance is greatly aided with Dual Goal (DG) instructions that ask subjects to discover two rules, one that generates “Dax” triples (equivalent to “yes” instances with Single Goal [SG] instructions) and another that generates “Med” triples (equivalent to “no” instances). The present study eliminates two explanations for this effect suggested by Wharton, Cheng, and Wickens (1993). Experiment 1 tested their Information-Quantity hypothesis that the effect results simply from the DG subjects testing more triples prior to proposing a rule. Our DG subjects were more likely to solve the problem and produced more “negative” triples than SG subjects when both groups generated exactly 15 triples. Two further groups received feedback only after generating all 15 triples, and again DG subjects were more likely to solve the problem and to generate more “negative” triples. Experiment 2 tested Wharton et al.'s Goal-Complementarity hypothesis that success under DG instructions hinges on preserving the complementary representation of the two rules. We compared SG instructions with three types of DG instructions that suggested different types of triples (Dax, Med, both Dax and Med, neither Dax nor Med). DG instructions were more effective in promoting successful rule discovery regardless of differences in rule complementarity. Our analysis of the heterogeneity of the examplars generated with DG instructions in both experiments suggest that success on the 2-4-6 task is as much a consequence of the breadth of hypotheses that subjects entertain as it is a consequence of the testing strategy.     

Calibration: A Conceptual Framework Applied to Scientific Practices Which Investigate Natural Phenomena by Means of Standardized Instruments

This paper deals with calibration in scientific practices which investigate relatively well-understood natural phenomena by means of already standardized instrumental devices. Calibration is a crucial topic, since it conditions the reliability of instrumental procedures in science. Yet although important, calibration is a relatively neglected topic. We think more attention should be devoted to calibration. The paper attempts to take a step in this direction. The aims are two-fold: (1) to characterize calibration in a relatively simple kind of scientific practices; (2) to provide conceptual and taxonomic tools of broader scope that help to get a better understanding of calibration in more complex cases and other kinds of scientific practices. For this purpose, we first provide indications for why a conceptual framework is needed. Second, a bibliographic survey of works dealing with calibration is attempted. Third, we introduce different tools to enable a better understanding of calibration. Fourth, we turn to the elaboration of what we call a “simple exemplar” of calibration, illustrated through the case of the calibration of an equal-arm balance. Fifth, the tools previously introduced, and the framework of the simple exemplar, are applied to a more complex case of calibration: calibration procedures in X-ray experiments. This serves to show the work accomplished by the simple exemplar and to emphasize features of more complex cases of calibration. Eventually, we revisit and specify the nature, status, scope and value of the proposed framework.     

Contiguity and the outcome density bias in action-outcome contingency judgements

In cause-outcome contingency judgement tasks, judgements often reflect the actual contingency but are also influenced by the overall probability of the outcome, P(O). Action-outcome instrumental learning tasks can foster a pattern in which judgements of positive contingencies become less positive as P(O) increases. Variable contiguity between the action and the outcome may produce this bias. Experiment 1 recorded judgements of positive contingencies that were largely uninfluenced by P(O) using an immediate contiguity procedure. Experiment 2 directly compared variable versus constant contiguity. The predicted interaction between contiguity and P(O) was observed for positive contingencies. These results stress the sensitivity of the causal learning mechanism to temporal contiguity.     

Saliva DHEAS changes in patients suffering from psychopathological disorders arising from bullying at work

BACKGROUND: Psychological disorders arising from bullying at work (BW) are common. The relationship between these disorders and putative markers is not well established. AIMS: To measure saliva dehydroepiandrosterone sulphate (DHEAS) and saliva cortisol as putative markers in individuals suffering from BW. METHODS: Forty one subjects suffering from BW were screened for mental distress at the institute of occupational health in Clermont-Ferrand, France. They were compared with 28 psychologically healthy controls (group C). The conditions causing BW were recorded. The hospital anxiety and depression (HAD) scale, the Beech questionnaire and the visual analogic scale (VAS) of stress were used to determine the psychological consequences of BW. Saliva samples were collected at awakening (7am), 30 and 60min after awakening, and then every 2h until bed time (11pm). RESULTS: The BW group had significantly higher scores on the HAD scale, higher stress on the VAS, and a higher score on the Beech questionnaire. They also had a significantly higher saliva concentration of DHEAS. There was no significant difference between groups in cortisol levels at any time, nor in area under the curve (AUC) and cortisol awakening response (CAR). There was a significant positive correlation between HAD and VAS scores and DHEAS levels, but not between cortisol levels or AUC or CAR. CONCLUSION: In contrast to saliva cortisol levels, saliva DHEAS levels are modified after psychological distress arising from BW. This discrepancy probably arises from the stability conferred by the very long half life of DHEAS of about 15h.