全文获取类型
收费全文 | 22313篇 |
免费 | 85篇 |
国内免费 | 8篇 |
出版年
2023年 | 21篇 |
2022年 | 13篇 |
2021年 | 29篇 |
2020年 | 38篇 |
2019年 | 45篇 |
2018年 | 3579篇 |
2017年 | 2887篇 |
2016年 | 2322篇 |
2015年 | 227篇 |
2014年 | 118篇 |
2013年 | 204篇 |
2012年 | 646篇 |
2011年 | 2485篇 |
2010年 | 2584篇 |
2009年 | 1521篇 |
2008年 | 1781篇 |
2007年 | 2260篇 |
2006年 | 65篇 |
2005年 | 259篇 |
2004年 | 210篇 |
2003年 | 147篇 |
2002年 | 111篇 |
2001年 | 79篇 |
2000年 | 101篇 |
1999年 | 45篇 |
1998年 | 38篇 |
1997年 | 36篇 |
1996年 | 20篇 |
1994年 | 14篇 |
1992年 | 20篇 |
1991年 | 23篇 |
1990年 | 42篇 |
1989年 | 31篇 |
1988年 | 14篇 |
1987年 | 24篇 |
1986年 | 31篇 |
1985年 | 25篇 |
1984年 | 25篇 |
1983年 | 21篇 |
1982年 | 15篇 |
1981年 | 14篇 |
1979年 | 14篇 |
1978年 | 13篇 |
1975年 | 15篇 |
1974年 | 16篇 |
1973年 | 20篇 |
1972年 | 14篇 |
1971年 | 20篇 |
1970年 | 15篇 |
1967年 | 10篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
132.
Kai U. SchnabelCorinne Alfeld Jacquelynne S. EcclesOlaf Köller Jürgen Baumert 《Journal of Vocational Behavior》2002,60(2):178-198
Despite the historical trend in all Western societies to increase educational participation irrespective of students' social origin, the correlation between parents' education and socio-economic status and the educational outcomes of their offspring remains a rather universal phenomenon. Although comparative studies have consistently found this association in various nations which differ in many ways in their educational systems, little is known about the mechanism behind this effect. Drawing on the assumption that career decision points are the major gateway for social background influences, we assume that similarities, as well as differences in the structure of the correlation between parents' socioeconomic background and students' school success, can be explained. Using two longitudinal data sets from the United States (N=1425) and Germany (N=1755) covering the school careers from Grade 7 to Grade 10, the analyses supported the hypothesis that (a) achievement information is the best predictor of career relevant decisions in both nations, (b) parents' background variables are independent additional predictors of career decision but not for actual learning progress, and (c) the assumed accumulation process of social background influences is more pronounced in the German than in the U.S. school system. 相似文献
133.
We measured driving performance (lane-keeping errors, driving times, and glances away from the road scene) in a video driving simulator for 24 volunteers who each drove alone on a 10.6-km multicurved course while simultaneously placing calls on a mobile phone subscribed to a voice-activated dialing system. Driving performance also was measured for the same distance while participants manually dialed phone numbers and while they drove without dialing. There were 22% fewer lane-keeping errors (p<.01) and 56% fewer glances away from the road scene (p<.01) when they used voice-activated dialing as compared to manual dialing. Significantly longer driving times in both of the dialing conditions as compared to the No Dialing condition are discussed in terms of the hypothesis that drivers decrease driving speed to compensate for the demands of the secondary phone tasks. 相似文献
134.
Cliffordson C 《Scandinavian journal of psychology》2002,43(1):49-59
The purpose of the present study was to examine the structure of empathy using a hierarchical approach, and to compare the dimensions of empathy with measures of social functioning, in order to contribute to the understanding of the nature of empathy. The dimensionality of the Interpersonal Reactivity Index, which comprises four subscales (empathic concern, perspective taking, fantasy and personal distress) was examined using confirmatory factor analysis. Relations with the Social Skills Inventory were also investigated. A sample of 127 applicants for places on nursing and social work undergraduate programs participated in the study. The study findings indicate that empathy is hierarchically organized, with one general dimension at the apex. The general factor is identical to empathic concern and this dimension overlaps to a great extent with perspective taking and fantasy. The findings also indicate that the general dimension constitutes an integrated entirety, with its main emphasis on emotional reactivity by also involving cognitive processes. 相似文献
135.
Kroll NE Yonelinas AP Dobbins IG Frederick CM 《Journal of experimental psychology. General》2002,131(2):241-254
A fundamental challenge to psychological research is the measurement of cognitive processes uncontaminated by response strategies resulting from different testing procedures. Test-free estimates of ability are vital when comparing the performance of different groups or different conditions. The current study applied several sets of measurement models to both forced-choice and yes-no recognition memory tests and concluded that the traditional signal-detection model resulted in distorted estimates of accuracy. Two-factor models were necessary to separate memory sensitivity from response bias. These models indicated that (a) memory accuracy did not differ across the tests and (b) the tests relied on the same underlying memory processes. The results illustrate the pitfalls of using a single-component model to measure accuracy in tasks that reflect 2 or more underlying processes. 相似文献
136.
The competition-among-relations-in-nominals theory of conceptual combination: implications for stimulus class formation and class expansion 总被引:3,自引:0,他引:3
Gagné CL 《Journal of the experimental analysis of behavior》2002,78(3):551-565
One way in which new concepts are added to the conceptual system is through conceptual combination. The competition-among-relations-in-nominals (CARIN) theory (Gagné & Shoben, 1997) proposes that conceptual combination involves specifying a thematic relation (e.g., noun MADE OF modifier) to link the constituent concepts (e.g., chocolate and bee). This theory claims that relations have different strengths for various concepts that correspond to how often a modifier and relation have been paired in previous encounters with combined concepts and that this relational knowledge strongly affects the ease with which combined concepts can be formed. A mathematical model that incorporates key claims of the theory is presented, and empirical findings that are relevant to evaluating the CARIN theory are reviewed. The parallels between the CARIN theory and approaches to stimulus class formation are also discussed. 相似文献
137.
We analyzed detection asymmetry, using openand closed squares as target and contextelements. It was found that varying density, regularity, and target eccentricity not only can modulate the amount of asymmetry, but also can produce a reversal in the direction of the asymmetry. The results suggest that the different stimuli are processed with different grains of analysis,consisting of in some cases, single elements and their properties and, in other cases, larger units of the stimulus array and more globalproperties. A detection task that can utilize the properties that are available with a given grain of analysis would show an advantage over a task for which the given grain of analysis is not as favorable, resulting indetection asymmetry in one direction or another. 相似文献
138.
Previous recognition memory studies indicate that when both recollection and familiarity are expected to contribute to recognition performance (e.g., discriminating studied items from nonstudied items) the dual-process and the unequal-variance signal detection models provide comparable accounts of performance. When familiarity is not expected to be useful (e.g., when items from two equally familiar sources are discriminated between), the dual-process model provides a significantly better account of performance. In the present study, source recognition was tested under conditions in which familiarity could have been used to perform a list-discrimination task; participants were required to discriminate between strong studied items, weak studied items, and new items. The dual-process model provided a better account of performance than did the unequal-variance model. Moreover, the results indicated that the unequal-variance assumption in a single-process signal detection model was not a valid substitution for recollection and that recollection was used to make recognition judgments even when assessments of familiarity were useful. 相似文献
139.
Gagné CL 《Brain and language》2002,81(1-3):723-735
To interpret a novel compound (e.g., chocolate twig), one must access the concepts denoted by the words and select a relation that links them together. To examine the role of lexical and relation information on conceptual combination, target combinations were preceded by one of three prime combinations. In Experiment 1, the prime used a semantically similar head noun and either the same or different relation. The third prime was semantically unrelated to the target. Experiment 2 was identical, except the modifier was the semantically related constituent. Although semantic priming was observed in both experiments, relation priming was obtained only when the modifier was similar. 相似文献
140.