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131.
132.
Probabilistic phonotactics refers to the relative frequencies of segments and sequences of segments in spoken words. Neighborhood density refers to the number of words that are phonologically similar to a given word. Despite a positive correlation between phonotactic probability and neighborhood density, nonsense words with high probability segments and sequences are responded to more quickly than nonsense words with low probability segments and sequences, whereas real words occurring in dense similarity neighborhoods are responded to more slowly than real words occurring in sparse similarity neighborhoods. This contradiction may be resolved by hypothesizing that effects of probabilistic phonotactics have a sublexical focus and that effects of similarity neighborhood density have a lexical focus. The implications of this hypothesis for models of spoken word recognition are discussed. 相似文献
133.
A method of matrix analysis of group structure 总被引:7,自引:0,他引:7
Matrix methods may be applied to the analysis of experimental data concerning group structure when these data indicate relationships which can be depicted by line diagrams such as sociograms. One may introduce two concepts,n-chain and clique, which have simple relationships to the powers of certain matrices. Using them it is possible to determine the group structure by methods which are both faster and more certain than less systematic methods. This paper describes such a matrix method and applies it to the analysis of practical examples. At several points some unsolved problems in this field are indicated. 相似文献
134.
Suppose, as an idealization, that sensory intensity is coded in peripheral channels as identical Poisson pulse trains with intensity parameter a power function of signal intensity. Discrimination models based on either an average count computed over a fixed time or an average time computed for a fixed count per channel have difficulty in fitting the Weber function ( versus I) if the free parameters are constrained to ranges determined from other experiments (magnitude estimation, reaction time). Here we study a different decision rule, namely, the most extreme observation in either the counting or timing mode. Our extremum-counting model, but not two timing ones, accounts very nicely for the Weber function. However, the ROC curves for these extremum models, which agree in shape with data of Green and Luce, yield estimates for the intensity parameter which are much larger than predicted by the power function growth used to calculate ΔI and about twice as large as those estimated from reaction time data collected in the same experiment. 相似文献
135.
R. Duncan Luce 《Psychometrika》1962,27(2):163-167
The choice model considered by Luce in an earlier work is stated in terms of unobservable parameters. In this paper a consequence of the model, involving only observables, is shown to be equivalent to the model.This work was supported in part by National Science Foundation Grants NSF G-8864 and NSF G-17637 to the University of Pennsylvania. 相似文献
136.
Some experiments on simple and choice reaction time 总被引:1,自引:0,他引:1
137.
Recent studies show that perceptual boundaries between phonetic categories are changeable with training (Norris, McQueen, & Cutler, 2003). For example, Kraljic and Samuel (2005) exposed listeners in a lexical decision task to ambiguous /s-integral/ sounds in either s-word contexts (e.g., legacy) or integral-word contexts (e.g., parachute). In a subsequent /s/-/integral/ categorization test, listeners in the /s/ condition categorized more tokens as /s/ than did those in the /integral/ condition. The effect--termed perceptual learning in speech--is assumed to reflect a change in phonetic category representation. However, the result could be due to a decision bias resulting from the training task. In Experiment 1, we replicated the basic Kraljic and Samuel (2005) experiment and added an AXB discrimination test. In Experiment 2, we used a task that is less likely to induce a decision bias. Results of both experiments and signal detection analyses point to a true change in phonetic representation. 相似文献
138.
139.
This paper describes our search for the possible relationship between workers' health and quality of life and several psychosocial risks: Cognitive demands, Control, Rewards and Organizational support. These psychosocial risks were assessed by means of the DECORE Multidimensional Questionnaire, which provides five scores, one for each factor, plus a global score. Workers' health was assessed with the following variables: job satisfaction, stress perception, fatigue perception, medical leave, occupational accidents, and disease. 614 workers from various business sectors were examined. Results show that workers who feel more fatigued, stressed, and less satisfied perceive their work environment more adversely. Similar results were obtained for workers who went on medical leave, had an occupational accident, or suffered from disease. 相似文献
140.
The author interprets idolatry, totemism, sacrilege and taboo through her theory of sexual difference and her study of Eastern spirituality. She argues that the taboo on spirituality in Western culture has cancelled difference, resulting in our current forms of idolatry. Preserving difference, however, would allow the transcendence of the human other to exist. The task of learning to respect difference is central to human spirituality and spiritual progression. The article is a translation of “La transcendance de l’autre” in Autour d’idôlatrie: figures actuelles de pouvoir et de domination, Ed. Bernard Van Meenen, Publications des Facultés Universitaires Saint-Louis, Brussels: 2003. 相似文献