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41.
In many psychophysical experiments, the participant's task is to detect small changes along a given stimulus dimension or to identify the direction (e.g., upward vs. downward) of such changes. The results of these experiments are traditionally analyzed with a constant-variance Gaussian (CVG) model or a high-threshold (HT) model. Here, the authors demonstrate that for changes along three basic sound dimensions (frequency, intensity, and amplitude-modulation rate), such models cannot account for the observed relationship between detection thresholds and direction-identification thresholds. It is shown that two alternative models can account for this relationship. One of them is based on the idea of sensory quanta; the other assumes that small changes are detected on the basis of Poisson processes with low means. The predictions of these two models are then compared against receiver operating characteristics (ROCs) for the detection of changes in sound intensity. It is concluded that human listeners' perception of small and unidimensional acoustic changes is better described by a discrete-state Poisson model than by the more commonly used CVG model or by the less favored HT and quantum models. 相似文献
42.
Coulon M Deputte BL Heyman Y Delatouce L Richard C Baudoin C 《Journal of comparative psychology (Washington, D.C. : 1983)》2007,121(2):198-204
Species discrimination has been described in several taxa but rarely in domestic animals. In contrast to wild species, domestic species present a great phenotypic variety. This study investigated whether 10 Prim'Holstein heifers (Bos taurus) could discriminate images of cows from images of other domestic animals. The experiment was based on simultaneous discrimination. Responses were obtained through instrumental conditioning using a food reward. In Experiment 1, the reward was associated with a cow face and, in the reversal learning task, with faces of other domestic species. The results showed that in both tasks, cows were able to reach the criterion in few sessions. Therefore, despite great phenotypic variety (a cognitive challenge) cows were able to visually discriminate their own species from other domestic species. 相似文献
43.
The purpose of our study was to further elucidate how employees should behave at work to increase their chances of being mentored by their immediate supervisor. To that end, we experimentally tested how three domains of employee performance [task performance (TP), organizational citizenship behavior (OCB) targeting the supervisor, and counterproductive work behavior (CWB) targeting coworkers] affect supervisors’ willingness to mentor. Each performance domain affected willingness to mentor. OCB had the weakest of the three main effects. Finally, the positive effect of TP was stronger when employees displayed less CWB. 相似文献
44.
Leung HT Bailey GK Laurent V Westbrook RF 《Journal of experimental psychology. Animal behavior processes》2007,33(3):299-313
A series of experiments studied reacquisition of fear reactions to a completely extinguished context. Reacquisition was rapid when reconditioning occurred as soon as the fear reactions were completely extinguished, showing that the original conditioning was intact. However, when reconditioning occurred after massive extinction training, fear reactions were depressed but then recovered across a long retention interval. This recovery was due to reconditioning and was similar to that produced by conditioning a massively preexposed context. These results show that massive extinction converts a potentially dangerous context into one that is merely familiar. 相似文献
45.
Pierre Charlebois Richard E. Tremblay Claude Gagnon Serge Larivée Denis Laurent 《Journal of psychopathology and behavioral assessment》1989,11(1):15-27
The issue of situational consistency is of great interest for early intervention with aggressive boys, but efforts to show behavior stability across settings have been unsuccessful to date, due principally to methodological problems. It is argued here that a more appropriate matching of response form, interaction partner, and situations should increase the situation consistency of observed behavior. The results support this proposition in that, more crosssetting behavior consistency was found in the pairing of situations where aggressive boys (age 6–7 years) were interacting with an adult female (mother/child versus baby-sitter/child) than in the pairing of situations where the boys were interacting with an adult male (mother/child versus father/child) or with the teacher in a nondyadic situation (classroom). The implications of using an extreme group are also discussed.This research program was funded by Le Conseil Québécois de la Recherche Sociale, the Quebec Government's FCAR research program, the Social Sciences and Humanities Research Council of Canada, the Canadian Ministry of Employment and Immigration, and the University of Montreal FDR program. 相似文献
46.
Laurent Cambon 《Psychologie du Travail et des Organisations》2011,17(2):129-141
This article examines the professional valorisation of gender-typed traits. In the study, participants should assess masculine, feminine and androgynous profiles in a set of professional contexts obtained by the crossing of social status (high versus low), gender (masculine versus feminine) and sector (production versus maintenance) of occupations. Consistent with a gender- typed trait matching model, the results showed that masculine profiles were the most valued ones in the most masculine occupations, feminine profiles were mostly valued in the most feminine occupations while androgynous profiles were the most valued in gender ambiguous occupations. Of particular interest was the fact that the perception of occupations’ gender was a function of the interaction between the gender and the sector of occupations (i.e.: the most masculine occupations were those that were stereotypically masculine and belonging to the production sector; the most feminine were those that were stereotypically feminine and belonging to the maintenance sector; the stereotypically masculine and maintenance occupations as the stereotypically feminine and production occupations were perceived as less gender typed). 相似文献
47.
Laurent Gayer 《Sikh Formations》2013,9(1):1-19
For the first time in Sikh historiography, this article deals with the definition, institutionalization, canonization and commodification of modern Sikh music (kirtan) since the so-called Singh Sabha reformation. On the whole, it takes Sikh music as a suitable lens through which to examine societal and intellectual change, assuming that it is closely embedded in society and formative to its construction, negotiation and transformation in terms of (moral) consensus and conflict. Specifically, it discusses the influence of Western Orientalism (Max Arthur Macauliffe) and musicology, staff notation, Princely patronage (Maharaja Bhupinder Singh of Patiala), Christian missionaries and the introduction of new instruments (the harmonium, brass bands) to the making of modern Sikh music. Moreover, it investigates its relationship with what I have elsewhere labelled the Singh Sabha ‘moral language’ in terms of identity politics, for example in connection to popular culture (Punjabi bhangra), the notion of ‘authenticity’ and the British civilizing mission. 相似文献
48.
Time-based prospective memory tasks require the retrieval of previously formed plans (e.g., call me on my mobile phone) either at a specified time (e.g., at 3 p.m.) or after a specified period of time has elapsed (e.g., in 3 min). In the present study, we investigated whether the same time-related processes are recruited for a short-duration time-based prospective memory task and for a time-interval production task. In a dual-task paradigm, we required young adult participants to make category-membership decisions, while they were simultaneously engaged either in a time-based prospective memory tasks or in a time-interval production task. Under one set of conditions, participants were instructed to allocate attention equally to the two tasks, whereas in another set of conditions, they allocated attention primarily to the time-relevant task. The findings revealed that time estimates were not affected by the attention allocation manipulation, although it influenced performance on the concurrent category membership decision making task, and as expected time estimates were more accurate on the prospective memory task than on the time-production task. Based on the preponderance of the findings, we suggest that timing is managed by different mechanisms and/or strategies on time-interval production tasks and on short-duration time-based prospective memory tasks. 相似文献
49.
50.
This study addressed the issue of intentional stabilization of between-persons coordination patterns (in-phase/isodirectional and anti-phase/non-isodirectional) and the attentional cost incurred by the nervous system in maintaining and further stabilizing these coordination patterns. Five pairs of participants performed in-phase and anti-phase interpersonal coordination patterns in dual-task conditions (coordination+RT task). Results showed that: (1) isodirectional pattern (in-phase) was more stable than non-isodirectional pattern (anti-phase), (2) both iso- and non-isodirectional pattern were stabilized intentionally, (3) RT was lower for the isodirectional pattern (i.e., the most stable), and (4) attentional manipulation led to a trade-off between pattern stability and RT performance. These results suggest that performing between-persons coordination patterns incurs a central cost that depends on the coupling strength between the limbs. These findings are consistent with the previous studies in intrapersonal coordination. 相似文献