首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   598篇
  免费   78篇
  国内免费   21篇
  697篇
  2025年   2篇
  2024年   7篇
  2023年   6篇
  2022年   8篇
  2021年   18篇
  2020年   25篇
  2019年   32篇
  2018年   27篇
  2017年   28篇
  2016年   24篇
  2015年   18篇
  2014年   25篇
  2013年   87篇
  2012年   30篇
  2011年   27篇
  2010年   14篇
  2009年   31篇
  2008年   25篇
  2007年   36篇
  2006年   33篇
  2005年   25篇
  2004年   20篇
  2003年   20篇
  2002年   19篇
  2001年   16篇
  2000年   13篇
  1999年   8篇
  1998年   8篇
  1997年   9篇
  1996年   4篇
  1995年   7篇
  1994年   6篇
  1993年   7篇
  1992年   3篇
  1991年   1篇
  1990年   4篇
  1989年   1篇
  1988年   2篇
  1986年   2篇
  1985年   5篇
  1983年   4篇
  1982年   2篇
  1981年   1篇
  1980年   1篇
  1979年   2篇
  1978年   2篇
  1977年   2篇
排序方式: 共有697条查询结果,搜索用时 15 毫秒
101.
    
To examine the effects on concurrent performance of independent manipulations of response-unit duration and number, 6 hens were exposed to concurrent second-order schedules of reinforcement. Each first-order operant unit required completion of a fixed-ratio schedule within the time specified by a fixed-interval schedule, with one further response completing the fixed-interval schedule. The fixed-ratio and fixed-interval requirements comprising the first-order operant units were systematically and independently varied under three pairs of concurrent variable-interval schedules to produce differences in the first-order response and duration requirements (response and duration differentials). These manipulations produced consistent changes in response, time, and operant-unit biases. A 1:4 response differential biased the time and operant-unit measures towards the smaller fixed ratio, but to a degree less than the imposed response differential. The response-based biases favored the larger fixed ratio. Duration differentials of 4:1 and 8:1 biased the response and operant-unit measures towards the shorter fixed interval, again less than the imposed duration differential, but the time biases remained close to zero. Both sorts of differentials acted to bias operant-unit completions more systematically than the other measures, but undermatching to the differentials occurred. The undermatching appears to have arisen from a pattern of fix and sample (in which visits to the less preferred alternative involved only a single completed operant unit) under combinations of unequal operant-unit requirements and reinforcer rates. The response and time bias measures appeared to arise as by-products of the changes in operant-unit completions.  相似文献   
102.
We examined the application of the verifiability approach to insurance claim interviews. The verifiability approach states that truth tellers and liars differ from each other in terms of the number of details they give that can be verified. Eighty‐three true and false insurance claim statements, related to damage, theft, or loss, were coded in terms of ‘witnesses’ (was the incident witnessed by others) and ‘verifiability’ (the number of perceptual and contextual details provided that could be checked by the investigator). We found that the majority of liars, compared with half the truth tellers, described unwitnessed incidents. This difference between the groups allowed for the detection of liars only. Discrimination between liars and truth tellers based on the verifiability of details was not possible. The implications of these findings are discussed. Copyright © 2014 John Wiley & Sons, Ltd.  相似文献   
103.
    
Two experiments tested the hypothesis that the decremental effects of massed practice are due to the development of a negative drive (Hull’s Ir). The results indicated that the decremental effects of massed practice on either the pursuit rotor or the two-hand coordinator do not transfer to depress performance or reminiscence on the other task. The results did not support Hull’s drive interpretation but were explained by theories attributing decrement to a decreased level of arousal.  相似文献   
104.
    
Consumers often encounter goods and services that provide cues to mark their progress. We define the term “goal progress cues” to reflect the diverse category of cues that highlight progress towards a goal. Across a series of three studies, we show that entity theorists, who rely on cues that highlight completion in order to signal their abilities to others, evaluate tasks that include these cues more favorably than those that lack these features. In contrast, incremental theorists, who focus on improving competence, are impacted only by progress cues that highlight learning. We demonstrate these findings across a variety of goal pursuit contexts that represent a mix of customer-centric (retail queues), service-oriented managerial (sales calls), and personal achievement consumer product (mazes) domains using both behavioral and self-reported measures. We conclude with a discussion about the theoretical and substantive implications of our findings.  相似文献   
105.
Three-month-olds are sensitive to orientation changes of line drawings when they have a three-dimensional (3-D) interpretation and when the changes are defined by both 3-D depth and two-dimensional (2-D) picture plane cues [Bhatt, R. S., & Bertin, E. (2001). Pictorial cues and three-dimensional information processing in early infancy. Journal of Experimental Child Psychology, 80, 315-332]. In the current study, we examined whether 3-month-olds are sensitive to pictorial line junction cues that signal orientation changes solely in the 3-D depth plane. The results revealed that infants discriminated a misoriented elongated cube in an array when the stimuli contained both shading and lines (Experiment 2) but not when only lines depicted the elongated cubes (Experiment 1). Testing with comparable 2-D images revealed that, even in the presence of shading information, detection of orientation changes is specific to images that have a 3-D interpretation. Together, the results suggest that 3-month-olds are sensitive to pictorial line junction cues that signal orientation changes in the 3-D depth plane to adults provided that shading information is available and the images have a 3-D interpretation.  相似文献   
106.
Researchers studying the movements of the human body often encounter data measured in angles (e.g., angular displacements of joints). The evaluation of these circular data requires special statistical methods. The authors introduce a new test for the analysis of order-constrained hypotheses for circular data. Through this test, researchers can evaluate their expectations regarding the outcome of an experiment directly by representing their ideas in the form of a hypothesis containing inequality constraints. The resulting data analysis is generally more powerful than one using standard null hypothesis testing. Two examples of circular data from human movement science are presented to illustrate the use of the test. Results from a simulation study show that the test performs well.  相似文献   
107.
This paper presents methods for second order meta-analysis along with several illustrative applications. A second order meta-analysis is a meta-analysis of a number of statistically independent and methodologically comparable first order meta-analyses examining ostensibly the same relationship in different contexts. First order meta-analysis greatly reduces sampling error variance but does not eliminate it. The residual sampling error is called second order sampling error. The purpose of a second order meta-analysis is to estimate the proportion of the variance in mean meta-analytic effect sizes across multiple first order meta-analyses attributable to second order sampling error and to use this information to improve accuracy of estimation for each first order meta-analytic estimate. We present equations and methods based on the random effects model for second order meta-analysis for three situations and three empirical applications of second order meta-analysis to illustrate the potential value of these methods to the pursuit of cumulative knowledge.  相似文献   
108.
Patterns of ratings using the Q-Sort method and the Likert-type method are compared. Ordering effects are found in Q-Sort ratings that are not present in Likert-type ratings. Specifically, item order is related to both item variance and item placement, such that items appearing near the end of the Q-Sort have less variance and more central placement. This finding is verified across three measures in several datasets spanning nearly 20 years of research. Such item order effects appear to attenuate average absolute relationships (covariances and correlations) between items appearing near the end of the Q-Sort and other measures. Randomization of items may be (in some situations) a viable course of action to minimize these effects at a sample level.  相似文献   
109.
By appropriately compressing texture elements on a circular surface, one can evoke the impression of being confronted with the depiction of a spherical object in the picture plane. According to Todd and Akerstrom (1987), the 3D perception of such an object can be eliminated if the optical elements are not sufficiently elongated or if they are not aligned with one another. In the current investigation, 4‐month‐old infants were tested for their ability to react to a disruption of the directional alignment variable. They were habituated to either a spherical surface or a surface the spatial layout of which was destroyed by reorienting the texture elements, and were afterwards tested with a further ellipsoid object and with a further flat surface. Data analysis revealed that the female infants, but not the male participants, preferred the novel posthabituation display, that is, the test stimulus which included a change in the orientational alignment of texture elements. These findings are discussed within the context of development of sensitivity to pictorial depth cues. It is possible that infants as young as 4 months of age respond to manipulations of the directional alignment factor per se, while older infants are capable of using this factor as a cue for 3D object shape. Copyright © 2003 John Wiley & Sons, Ltd.  相似文献   
110.
人脑眶额皮质表征奖赏信息的进展   总被引:5,自引:1,他引:4  
张锋  沈模卫  朱海燕  周星 《心理科学》2005,28(5):1047-1053
文章围绕人脑眶额皮质在表征奖赏信息上的核心作用展开,分别从人脑眶额皮质表征奖赏信息的共同神经表征和特异性神经表征特点,奖赏加工和该脑区局部形态特征之间的关系以及眶额皮质表征奖赏信息的时间动态性等角度对最近的重要研究进展进行了一定的梳理和概括。最后,文章讨论了未来研究需要解决的由奖赏类型多样性和脑区间奖赏信息整合复杂性带来的系列问题。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号