全文获取类型
收费全文 | 33324篇 |
免费 | 1396篇 |
国内免费 | 15篇 |
专业分类
34735篇 |
出版年
2020年 | 370篇 |
2019年 | 394篇 |
2018年 | 622篇 |
2017年 | 597篇 |
2016年 | 631篇 |
2015年 | 432篇 |
2014年 | 595篇 |
2013年 | 2895篇 |
2012年 | 1019篇 |
2011年 | 1121篇 |
2010年 | 634篇 |
2009年 | 733篇 |
2008年 | 1029篇 |
2007年 | 981篇 |
2006年 | 938篇 |
2005年 | 875篇 |
2004年 | 860篇 |
2003年 | 836篇 |
2002年 | 825篇 |
2001年 | 1003篇 |
2000年 | 963篇 |
1999年 | 771篇 |
1998年 | 433篇 |
1997年 | 403篇 |
1996年 | 342篇 |
1995年 | 354篇 |
1994年 | 319篇 |
1993年 | 357篇 |
1992年 | 640篇 |
1991年 | 556篇 |
1990年 | 617篇 |
1989年 | 523篇 |
1988年 | 498篇 |
1987年 | 488篇 |
1986年 | 498篇 |
1985年 | 576篇 |
1984年 | 509篇 |
1983年 | 465篇 |
1982年 | 395篇 |
1981年 | 353篇 |
1979年 | 447篇 |
1978年 | 422篇 |
1977年 | 350篇 |
1976年 | 345篇 |
1975年 | 431篇 |
1974年 | 489篇 |
1973年 | 449篇 |
1972年 | 343篇 |
1968年 | 353篇 |
1966年 | 326篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
211.
I am grateful to John Bickle, Jaegwon Kim, Brian McLaughlin, and, most especially, to my colleague, Alfred Mele, for much helpful discussion on the topic of intentional causation. 相似文献
212.
Although visuoconstructive impairment has been reported in both Alzheimer's (DAT) and Huntington's (HD) disease, there is little knowledge concerning how this cognitive deficit differs quantitatively and qualitatively in these two progressive dementias. To address this issue, the present study compared performances on the Clock Drawing Test (CDT: command and copy) of 25 DAT patients, 25 equally demented HD patients, and 25 elderly normal controls (NC). In the command condition, both patients groups were significantly impaired compared to the NC group. Although there was no significant difference between DAT and HD patients' total quantitative scores, a qualitative error analysis revealed a number of dissociations between the two patient groups. Graphic difficulties, very common in HD patients, were virtually absent in DAT patients; in contrast, conceptual errors were almost exclusively seen in DAT patients and were related to the severity of their dementia. Perseveration and "stimulus-bound" responses were also more frequent in DAT patients, and both groups made visuospatial errors. In the copy condition, the DAT, but not the HD, patients evidenced a marked improvement in performance. These results indicate that while both DAT and HD patients have significant visuoconstructive difficulties even in the early stages of their disorders, the specific cognitive processes underlying their quantitative impairments are quite different. It is possible that the DAT patients' conceptual errors are yet another indicator of the deterioration of their semantic knowledge. 相似文献
213.
Remembering pictures: pleasure and arousal in memory. 总被引:17,自引:0,他引:17
M M Bradley M K Greenwald M C Petry P J Lang 《Journal of experimental psychology. Learning, memory, and cognition》1992,18(2):379-390
Incidental memory performance for pictures that varied along the affective dimensions of pleasantness and arousal was assessed. For both an immediate and delayed (1 year later) free-recall task, only the arousal dimension had a stable effect on memory performance: Pictures rated as highly arousing were remembered better than low-arousal stimuli. This effect was corroborated in a speeded recognition test, in which high-arousal materials encoded earlier in the experiment produced faster reaction times than their low-arousal counterparts. Pleasantness affected reaction time decisions only for pictures not encoded earlier. These results suggest that whereas both the dimensions of pleasantness and arousal are processed at initial encoding, long-term memory performance is mainly affected by arousal. 相似文献
214.
215.
This article describes a study conducted to identify the range of potential influences that a computer-assisted careers guidance system (PROSPECT (HE)) had on the functioning of organisations (careers services in higher education). Data from six institutions indicated that use of PROSPECT (HE) was associated with important and varied change within the organisations. It appears that when a careers service seeks opportunities for change, CACG systems can be an important catalyst for change in two respects: by providing a focal point for achieving previously established goals; or, as a consequence of system use, by making staff aware of the potential for new organisational goals. 相似文献
216.
John Foskett 《British Journal of Guidance & Counselling》1992,20(1):39-50
The historical and contemporary context of pastoral care and counselling within the judaeo/Christian tradition is reviewed. Three kinds of pastors who use counselling in their work - Christian, specialist, and generic - are identified and the ethical problems of their positions clarified. The ethical principles of autonomy, beneficence, non-maleficence and justice are applied to the counselling work of pastors. Theology's definition of various ethical levels, and the impact of these upon the professional ethics of pastoral carers and counsellors, are explored, and some conclusions for the future drawn. 相似文献
217.
Marilyn P. Safir Rachel Hertz-Lazarowitz Shoshanna BenTsvi-Mayer Haggai Kupermintz 《Sex roles》1992,27(9-10):439-453
Several studies have revealed teachers' asymmetric perceptions of girls and boys in their classes. The present research examines these effects on schoolchildren's own perceptions of the prominence of male and female peers in school relevant categories. A total of 147 (native born, Jewish middle class) second and sixth graders participated in the study. A questionnaire in two versions was prepared: One formulated in the masculine plural, habitually used in Hebrew as the generic plural for both sexes. The other in both masculine and feminine (optional he/she) plural, also admissible in Hebrew usage. Overall, students judged more boys as prominent, even more so in sixth grade. Subjects also pointed to same-sex peers as prominent. Surprisingly, the sex-optional formulation of the questionnaire did not decrease stereotyping perceptions. Results raise questions about the status of girls in school. Implications for girls' future as achievers in modern society are discussed. Furthermore, the effectiveness of language manipulation in Hebrew regarding sexist vs. nonsexist attitudes is put into question. 相似文献
218.
Two experiments are reported which investigated how subject gender and time-of-day influenced the estimation of duration and
the perception of task-related mental workload. In the first experiment, 24 subjects performed a filled time-estimation task
in a constant blacked-out, noise-reduced environment at 0800h, 1200h, 1600h, and 2000h, respectively. In the second experiment,
12 different subjects performed an unfilled time estimation task in similar conditions at 0900h, 1400h, and 1900h. At the
termination of all experimental sessions, participants completed the NASA Task Load Index workload assessment questionnaire
as a measure of perceived mental workload. Results indicated that physiological response, reflected in body temperature change,
followed an expected pattern of sequential increase with time-of-day. However, estimates of duration and the perception of
mental workload showed no significant effects for time-of-day. In each of the experiments there were significant differences
in time estimation and mental workload response contingent on the gender of the participant. These results are interpreted
in light of the previous positive findings for circadian fluctuation in performance efficiency and the equivocal findings
of a gender difference in time estimation. A unifying account of these collective results is given based on gender by time-of-day
interactional effects.
An earlier version of this paper was presented at the 32nd Annual Meeting of the Human Factors Society, Anaheim, CA, October,
1988. 相似文献
219.
Valerie P. Hans 《Current Psychology》1992,2(3):283-299
A comparative survey of jury selection practices in Britain and the United States indicates that the two countries differ
along a number of dimensions, including the emphasis on the jury selection process in the trial, the amount and type of information
available about prospective jurors, and the frequency with which trial lawyers alter the composition of the jury. The probable
impact of these differences is analysed by considering the importance of jury composition in determining a jury’s verdict,
the effectiveness of lawyers in exercising their challenges, and broader effects of jury selection procedures in the two countries. 相似文献
220.
John Duckitt 《Current Psychology》1992,11(4):291-307
Originally it was thought that prejudiced intergroup attitudes were very closely related to negative intergroup behavior.
More recently, empirical studies reveal a weak and inconsistent relationship, that discriminatory intergroup behavior is therefore
largely determined by situational factors, and that it is relatively independent of an individual’s attitudes. A detailed
review of this research, however, suggests that the relationship between prejudice and behavior may be much more consistent
than has been thought. Moreover, although the relationship is usually not very powerful, most research has involved methodological
inadequacies which would have inappropriately depressed it. Finally, it is noted that, for negative intergroup behavior to
be situationally determined, does not exclude a strong relationship between it and prejudiced attitudes. 相似文献