全文获取类型
收费全文 | 33453篇 |
免费 | 1299篇 |
国内免费 | 18篇 |
出版年
2020年 | 336篇 |
2019年 | 450篇 |
2018年 | 615篇 |
2017年 | 665篇 |
2016年 | 625篇 |
2015年 | 472篇 |
2014年 | 535篇 |
2013年 | 2624篇 |
2012年 | 939篇 |
2011年 | 1078篇 |
2010年 | 705篇 |
2009年 | 697篇 |
2008年 | 975篇 |
2007年 | 914篇 |
2006年 | 828篇 |
2005年 | 719篇 |
2004年 | 662篇 |
2003年 | 701篇 |
2002年 | 643篇 |
2001年 | 1228篇 |
2000年 | 1186篇 |
1999年 | 871篇 |
1998年 | 399篇 |
1997年 | 319篇 |
1996年 | 320篇 |
1995年 | 319篇 |
1994年 | 325篇 |
1993年 | 320篇 |
1992年 | 740篇 |
1991年 | 713篇 |
1990年 | 664篇 |
1989年 | 623篇 |
1988年 | 590篇 |
1987年 | 594篇 |
1986年 | 552篇 |
1985年 | 617篇 |
1984年 | 482篇 |
1983年 | 375篇 |
1979年 | 471篇 |
1978年 | 349篇 |
1977年 | 336篇 |
1975年 | 419篇 |
1974年 | 422篇 |
1973年 | 481篇 |
1972年 | 384篇 |
1971年 | 323篇 |
1969年 | 328篇 |
1968年 | 379篇 |
1967年 | 334篇 |
1966年 | 385篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
Timothy J. Trull Eric Hillerbrand 《Journal of psychopathology and behavioral assessment》1990,12(4):285-297
Normative data for the Fear Questionnaire (Marks & Mathews, 1979), a popular self-report instrument measuring phobic concerns, were collected from both a community and a collegiate sample. The covariation and internal consistency of the blood-injury phobia (BI), social phobia (SO), and agoraphobia (AG) subscales were assessed in each sample, and the factor structure of the items from these three subscales was examined. Results indicated that, in general, community subjects reported more phobic concerns than did collegiate subjects, and females reported greater phobic concerns than did males. Results from confirmatory factor analyses suggest that the three factors of BI, SO, and AG did not emerge from either data set. Follow-up exploratory factor analyses did identify the general factors of blood-injury phobia and agoraphobia. Normative data from the present study are compared to those obtained previously, and directions for future research are provided. 相似文献
982.
K. Blokker S. Bruin J. Bryden I. Houseman C. Okkerse C. Van der Meer A. P. Verkaik 《Knowledge, Technology, and Policy》1990,3(3):76-83
In this article the perspective shifts to the “upstream” end of the agricultural knowledge and information system (AKIS).
Because knowledge policy and strategic decision-making are not the prerogative of the public sector, organizations such as
cooperative unions and multinational companies are included. After considering the influence of the changing environment on
the nature of the AKIS, the role of knowledge management and policy in the emerging knowledge and information market is examined.
Special attention is given to public and private R&D. The article then looks where information technology (IT) fits in and
what considerations determine strategic investment in IT projects and sustained services. Some of the European experiences
with this strategic investment are evaluated. 相似文献
983.
984.
985.
Four experiments designed to investigate a visual search task are reported. In each experiment, subjects searched for either a two-dimensional shape rotated in depth among frontal-parallel distractors or a frontal-parallel shape among distractors that were rotated in depth. The principal independent variable was search-set size. In addition, over the four experiments, a variety of spatial arrangements and two axes of rotation in depth were sampled. The chief aim of the experiments was to adduce evidence bearing on the attentional demands of searching for depth. The slopes of the reaction-time (RT) functions were taken as diagnostic. Experiments 1–3 exhibited positive slopes for the RT-set-size function. These slopes appear to be due to a conscious adoption of a serial search strategy by the subjects. When this tendency was suppressed by the procedures of Experiment 4, the slope of the RT-set-size functions did not differ significantly from zero. We conclude that, in agreement with the findings of other studies, slant-in-depth can be detected preattentively. 相似文献
986.
Depression in some patients with spinal cord injuries may be clinically significant and, when present, should be treated to
decrease morbidity including decreased physical functioning. Depression associated with spinal cord injury (SCI) may be misevaluated,
due to (1) nonspecific multifactorial production of depression symptoms and (2) SCI-specific decrease in somatic sensory central
nervous system input. The Somatic Suppression Hypothesis suggests that SCI patients have difficulty experiencing any intense
emotion because of suppression of physiological arousal. In addition, cognitive processes that may reduce depression in SCI
patients include: (1) attribution of somatic symptoms of depression to medical (biological) causes, (2) realistic, positive
expectations for physical improvement, and (3) the perception that the disability of the SCI is only minimally related to
the patient’s self-care after complete evaluation. Health personnel should accept lack of depression in SCI, and should encourage
positive realistic expectations of recovery. 相似文献
987.
988.
Glenn SS 《The Behavior analyst / MABA》1993,16(2):133-151
Behavior analysis is a cultural system of which the Association for Behavior Analysis is a component cultural system. As cultural systems, they are composed of interlocking behavioral contingencies that constitute their cultural practices. Critical to the survival of both cultural systems is the frequency of interaction with and the nature of the content of the behavioral contingencies composing those cultural practices. The strengths of behavior analysis as a cultural system include its disciplinary character and its worldwide community of scientists and practitioners; its ability to be integrated into a scientific worldview; its track record in providing effective solutions to problems of importance to society; and the high levels of intellect, competence, and commitment that are characteristic of its participants. Weaknesses of behavior analysis are its status as an academic orphan, its relatively small size and its underdeveloped professional identity, and a lack of sociopolitical sophistication among many of its members. Behavior analysis will need to maximize its strengths and mitigate its weaknesses if it is to take advantage of the many opportunities available for growth in the modern world. 相似文献
989.
990.
Andrew J. Vinchur Erich P. Prien Jeffery S. Schippmann 《Journal of business and psychology》1993,8(2):215-226
Content-oriented test development requires information derived from a comprehensive job analysis. The job data typically consist of task and skill statements identified by subject matter experts. These statements characterize a target job and are then used to develop the test plan and item budget. The predominant practice for combining data from the task and job skill domains to facilitate preparation of a test plan and item budget is an impressionistic approach. This study reports variations and extensions of an alternative quantitative procedure for linking task and job skill data (Hughes & Prien, 1989) using results obtained in field studies. The results indicate that the procedure reported by Hughes and Prien (1989) yields consistent results. Also, modifications to the procedure result in more detailed solutions.Dr. Charles Lawshe graciously contributed three sets of job analysis data to this research project. Dr. Lawshe also provided a very thoughtful and cogent critique of our attempts to express these thoughts to a user audience and for this we are grateful. 相似文献