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21.
Stimulus discriminability in free-operant and discrete-trial detection procedures. 总被引:4,自引:4,他引:0 下载免费PDF全文
D McCarthy M Davison P E Jenkins 《Journal of the experimental analysis of behavior》1982,37(2):199-215
Six pigeons were trained to discriminate different light intensities in four experimental procedures. Experiment 1 compared stimulus discriminability in a yes-no signal-detection task with discriminability measures obtained from two free-operant procedures. Discriminability estimates were significantly lower in the detection procedure. Experiment 2 showed this lowered discriminability to be a function of the delay between stimulus presentation and the availability of the choice-response keys in the standard detection task. In addition, reinforcement sensitivity was lowest when correct choice responses were intermittently, rather than continuously, reinforced. 相似文献
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管理胜任力特征分析:结构方程模型检验 总被引:171,自引:0,他引:171
管理胜任力特征分析是人事选拔与评价的重要内容之一。本研究在运用基于胜任力的职位分析并总结国内外有关文献的基础上,编制了管理综合素质评价量表,并运用此量表调查了220名中高层管理者,采用因素分析和结构方程模型检验企业高级管理者胜任力特征的结构。结果表明,管理胜任力特征结构由管理素质和管理技能等两个维度构成,但在维度要素及其关键度上,职位层次间存在显著差异。本研究为管理职位的测评选拔提供了新的理论依据。 相似文献
23.
发表《科学引文索引》 (science citation index, SCI) 论文的多少和论文被引用率的高低, 是国际上通用的评价基础研究成果水平的标准。引进SCI的概念, 对促进我国的科研评价标准化和国际化发挥了积极作用。SCI目前已经成为我国评价科研成果的重要指标, 某些地方甚至成为唯一指标。但SCI主要侧重在基础学科领域的评价, 不能涵盖全面的科技评价。在肯定SCI对规范我国科研的评价体系的积极作用的同时, 对其负面影响也不能忽视。以上海中医药大学为例, 通过介绍SCI和国内SCI论文发表的现状, 对正确认识和全面评价SCI的作用提出建议。 相似文献
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ObjectivesThis study examined whether individuals who assigned equal priority to physical activity and an alternative activity exhibited lower levels of participation in physical activities than individuals who assigned higher priority to physical activity than an alternative activity. In addition, we examined whether a measure of prioritisation derived from an algebraic difference index provided a rigorous test of prioritisation effects.DesignWe employed a two-wave prospective design that aimed to predict physical activity participation.MethodPrioritisation, intentions and perceptions of control were measured at the first wave of data collection. After five weeks, we administered follow-up measures of behavioural conflict and physical activity participation.ResultsA hierarchical regression analysis showed that although the algebraic difference index was positively associated with measures of physical activity participation, equal prioritisation did not yield lower levels of physical activity participation than high prioritisation.ConclusionsFindings suggest that equal prioritisation is not a less optimal self-regulatory strategy than high prioritisation in the domain of physical activity. Regression coefficients associated with algebraic difference indexes should be interpreted with caution and consider analyses that examine effects of component measures of prioritisation on physical activity participation. 相似文献
26.
Chun Wang Ping Chen Alan Huebner 《The British journal of mathematical and statistical psychology》2021,74(2):184-202
Computerized classification testing (CCT) aims to classify persons into one of two or more possible categories to make decisions such as mastery/non-mastery or meet most/meet all/exceed. A defining feature of CCT is its stopping criterion: the test terminates when there is enough confidence to make a decision. There is abundant research on CCT with a single cut-off, and two common stopping criteria are the sequential probability ratio test (SPRT) statistic and the generalized likelihood ratio statistic (GLR). However, there is a relative scarcity of research extending the SPRT to the multi-hypothesis case for when there is more than one cut-off. In this paper, we propose a new multi-category GLR (mGLR) statistic as well as a stochastically curtailed version of the CCT with three or more categories. A simulation study was conducted to show that the mGLR statistic outperformed the existing stopping rules by generating shorter average test length without sacrificing classification accuracy. Results also revealed that the stochastically curtailed mGLR successfully increased test efficiency in certain testing conditions. 相似文献
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《Pratiques Psychologiques》2020,26(3):231-240
ObjectivesPregnancy specific anxiety (PSA) may have many consequences on the health of the unborn child and the mother. Nowadays, in French, there is no validated tool to measure it. The aim of this study is to validate the French version of the Pregnancy Related Anxiety Questionnaire (PRAQ-R2). This 10 items scale measures three PSA dimensions: worries about child health, fear of giving birth and concern about own appearance.MethodsAfter a translation and a back-translation step, the structural validity and the internal consistency of the scale were assessed in 160 pregnant women recruited online. Convergent validity (STAI-Y) and correlates of the construct were also examined.ResultsThe model fit indices are satisfactory, confirming the three- factor structure of the PRAQ-R2 in its French version. The dimensions and the total scores have a good internal consistency (α > .80), and convergent validity was also demonstrated.ConclusionThe PRAQ-R2 is the first tool designed to measure PSA and validated in France. This French validation has promising psychometric qualities. However, its discriminant validity and stability remain to be explored. 相似文献
29.
Jacek Gierus 《Advances in cognitive psychology / University of Finance and Management in Warsaw》2020,16(4):344
Systematic information processing and decision-making under uncertainty are key constructs of new conceptions explaining the severity of pathological worry. The current study attempted to analyze their usefulness in subclinical and clinical groups. In the first phase of the study (N = 251) participants were examined with the Penn State Worry Questionnaire (PSWQ), a GP consultationrelated survey, and a screening survey for generalized anxiety disorder (GAD). In the second phase (N = 220), the State-Trait Anxiety Inventory, the PSWQ, and tasks measuring systematic information processing (SIP) versus heuristic reasoning (HR) were applied. In the third phase (N = 60), GAD (n = 30) and healthy control (n = 30) groups were examined with the above methods and the Iowa Gambling Task (IGT). In the low risk group, a relationship between mood and the representativeness heuristic (ρ = 0.50), as well as anchoring and adjustment heuristic (anxiety-related stimuli) was found (ρ = −0.53). In the GAD group, significant correlations between the PSWQ score, the IGT loss avoidance score (ρ = 0.40), and total IGT score (ρ = 0.48) were found. The results did not confirm a particular usefulness of the systematic/heuristic information processing construct in subclinical and clinical groups. Theory-consistent results were rather found in the nonclinical groups. Nevertheless, the data revealed some interesting findings supporting potential explanatory power of some theoretical models. 相似文献
30.
Children's and teachers' perception of social dominance was examined using a behavioral criterion for determining accuracy of verbal judgments. Video records of agonistic interactions were obtained during approximately 60 hours of free-play at two preschool centers. Analyses of social conflict episodes ending in submission revealed linear dominance structures for both groups. Dominance perception was assessed in two ways. Both teachers and children were asked to rank-order a subgroup of children according to dominance. They were also asked to select the more dominant children in a number of predetermined pairs. Results indicated that teachers could accurately judge dyadic dominance relations, and that accuracy among children varied as a function of their status within the group hierarchy. Findings have implications for social dominance assessment methodology, and for the issue of consensual versus ecological validity in developmental studies of social perception. 相似文献