全文获取类型
收费全文 | 4601篇 |
免费 | 246篇 |
专业分类
4847篇 |
出版年
2024年 | 12篇 |
2023年 | 28篇 |
2022年 | 56篇 |
2021年 | 67篇 |
2020年 | 113篇 |
2019年 | 106篇 |
2018年 | 201篇 |
2017年 | 198篇 |
2016年 | 238篇 |
2015年 | 165篇 |
2014年 | 195篇 |
2013年 | 627篇 |
2012年 | 261篇 |
2011年 | 269篇 |
2010年 | 152篇 |
2009年 | 150篇 |
2008年 | 225篇 |
2007年 | 219篇 |
2006年 | 154篇 |
2005年 | 123篇 |
2004年 | 140篇 |
2003年 | 154篇 |
2002年 | 102篇 |
2001年 | 68篇 |
2000年 | 110篇 |
1999年 | 47篇 |
1998年 | 45篇 |
1997年 | 37篇 |
1996年 | 37篇 |
1995年 | 19篇 |
1994年 | 23篇 |
1993年 | 22篇 |
1992年 | 32篇 |
1991年 | 25篇 |
1990年 | 31篇 |
1989年 | 28篇 |
1988年 | 21篇 |
1987年 | 22篇 |
1986年 | 22篇 |
1985年 | 20篇 |
1984年 | 26篇 |
1983年 | 21篇 |
1982年 | 19篇 |
1980年 | 16篇 |
1979年 | 17篇 |
1975年 | 16篇 |
1972年 | 13篇 |
1971年 | 13篇 |
1970年 | 15篇 |
1968年 | 11篇 |
排序方式: 共有4847条查询结果,搜索用时 0 毫秒
1.
2.
Harald Merckelbach Marcel A. van den Hout Anita Jansen G. Margo van der Molen 《Journal of psychopathology and behavioral assessment》1988,10(4):355-366
The nonrandom distribution of situational fears has been explained by evolutionary survival relevance of specific fears. Thirty-eight stimuli were taken from the literature on preparedness and were scored on fearfulness, objective dangerousness, and spatiotemporal unpredictability by three separate groups of students. The same items were scored on survival relevance by 15 biologists. Fearfulness of cues significantly correlated not only with survival relevance but also, and even more strongly, with dangerousness and unpredictability. While the fear/survival relevance association virtually disappeared when the unpredictability contribution was partialed out, the fear/unpredictability correlation was only marginally affected when controlling for survival relevance. This suggests that nonrandomness of feared stimuli may result from the spatiotemporal unpredictability that is attributed to these stimuli. The current practice of using snakes and spiders as phobia-relevant, and flowers and mushrooms as neutral, cues was not justified by the ratings of the 15 independent experts.This study was supported in part by a grant from the Dutch Organization for Fundamental Research (ZWO/Psychon, 560-268-001). 相似文献
3.
The main issue of this paper concerns the mediating role of risk appraisal in the relation between past and future behavior. We expected previous risky behavior to heighten risk appraisal, which, in turn, should stimulate preventive behavior. Results ofthree tests of this mediation hypothesis showed that past behavior was strongly related to future behavior; people who behaved hazardously in the past indicated that they tend to do so in the future. Generally, the expected relation between past behavior and risk appraisal was supported. More risky behavior in the past was associated with a heightened risk appraisal. Results also indicate a relation between risk appraisal and future behavior, but in the opposite direction as predicted. Heightened risk appraisal was related to increased levels of risk in future behavior. When predicting future behavior by both risk appraisal and past behavior the effect of risk appraisal on future behavior disappeared, while past behavior remained a strong predictor of future behavior. In a few cases risk appraisal still predicted future behavior when past behavior was controlled for. Unfortunately, these cases showed the opposite relation; i.e., heightened risk appraisal was related to more risky future behavior. Implications of these findings for research on the role of risk appraisal will be discussed. 相似文献
4.
Sören Stenlund 《Synthese》1989,79(1):51-98
The work on this paper was done in the research project V
ra begrepp om spr
k supported byHumanistisk-samhälls-vetenskapliga forskningsr
det. I am indebted to Per Martin-Löf, Hans Ruin, Pär Segerdahl, and Sven Öhman for valuable comments on a previous version of this paper. Thanks to the comments of the anonymous referee I was able to improve some formulations in the paper. 相似文献
5.
The Additive Factor Method: A differential diagnostic tool in hyperactivity and learning disability 总被引:1,自引:0,他引:1
Jaap van der Meere Maarten van Baal Joseph Sergeant 《Journal of abnormal child psychology》1989,17(4):409-422
The Additive Factor Method assumes that task performance is the sum of sequential and independent processes. We studied the duration of the central processes (memory search and decision) and the motor decision process in hyperactive and learning-disabled children under socalled divided attention and S-R compatibility conditions. It was found that the learning-disabled were impaired in memory search and decision processes whereas hyperactives were impaired in the motor decision process.The authors wish to thank L. Leertouwer for making the drawings. 相似文献
6.
The relationship between recognition and cued recall in memory of enacted and nonenacted information
Summary An experiment was conducted to determine whether the processes underlying memory for enacted and nonenacted events are the same or different. The experimental paradigm used was that of recognition failure of recallable information. At study subjects were given verbal commands (e.g., break the match, roll the ball), that they were to remember or enact and remember. At test subjects were first asked to recognize the noun in each command in the absence of the verb and then to recall the noun with the verb present as cue. Half the subjects were given the two tests in the reverse order. The results demonstrate that enactment and nonenactment differ with respect to the degree of dependence/independence between recognition and recall. In the enactment condition recognition and cued recall are completely independent and in the nonenactment condition they are almost completely dependent. 相似文献
7.
8.
Joop van der Pligt 《Journal of applied social psychology》1985,15(1):3-15
This study investigated attitude-behavior relationships in the context of energy conservation. Results indicated that general environmental concern is a poor predictor of energy-conservation behaviors. Direct evaluative comparisions of various non-conservationist behaviors with a more conservationist alternative showed a clear relationship with behavioral preference. Non-conservationists, however, evaluated their own behavior only marginally favorably and in some cases clearly unfavorably. This was accompanied by an overestimation of the common occurrence of these behaviors among the general population and by an unwillingness to relate these behaviors to personality characteristics. It is argued that these biases (i.e., considering one's behavior as a habit that is shared by many others) could hinder behavioral change. These findings are discussed in terms of effective public policy on the issue of energy consumption. 相似文献
9.
Correspondence analysis used complementary to loglinear analysis 总被引:1,自引:0,他引:1
Loglinear analysis and correspondence analysis provide us with two different methods for the decomposition of contingency tables. In this paper we will show that there are cases in which these two techniques can be used complementary to each other. More specifically, we will show that often correspondence analysis can be viewed as providing a decomposition of the difference between two matrices, each following a specific loglinear model. Therefore, in these cases the correspondence analysis solution can be interpreted in terms of the difference between these loglinear models. A generalization of correspondence analysis, recently proposed by Escofier, will also be discussed. With this decomposition, which includes classical correspondence analysis as a special case, it is possible to use correspondence analysis complementary to loglinear analysis in more instances than those described for classical correspondence analysis. In this context correspondence analysis is used for the decomposition of the residuals of specific restricted loglinear models. 相似文献
10.