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   772篇
  免费   22篇
  794篇
  2020年   9篇
  2019年   15篇
  2018年   14篇
  2017年   22篇
  2016年   17篇
  2015年   10篇
  2014年   15篇
  2013年   69篇
  2012年   26篇
  2011年   25篇
  2010年   19篇
  2009年   16篇
  2008年   22篇
  2007年   19篇
  2006年   25篇
  2005年   16篇
  2004年   16篇
  2003年   17篇
  2002年   22篇
  2001年   12篇
  2000年   25篇
  1999年   19篇
  1998年   13篇
  1997年   12篇
  1996年   11篇
  1995年   11篇
  1994年   9篇
  1993年   8篇
  1992年   9篇
  1989年   8篇
  1988年   5篇
  1986年   10篇
  1985年   15篇
  1984年   12篇
  1983年   14篇
  1982年   10篇
  1981年   9篇
  1980年   8篇
  1979年   12篇
  1978年   12篇
  1977年   16篇
  1976年   17篇
  1975年   16篇
  1974年   19篇
  1973年   7篇
  1972年   9篇
  1971年   9篇
  1969年   5篇
  1968年   8篇
  1967年   10篇
排序方式: 共有794条查询结果,搜索用时 15 毫秒
11.
Previous studies have shown that the introduction of an interocular delay in presentation to the two eyes of a briefly viewed, haploscopically presented object resulted in a rearward shift in the depth position of this object. The present study investigated the magnitude of this depth shift as a function of flash duration and determined the relationship of this magnitude to two-flash and simultaneity thresholds. It was found that depth shift magnitude decreased as flash duration increased, and that large depth shifts were associated with large two-flash thresholds. The hypothesis that depth shifts can occur within the temporal limits of binocular fusion was supported.  相似文献   
12.
This study was undertaken to examine ambiguities in the ability of the I-E scale to predict complex social behavior. An analysis of the items in the I-E scale suggested that the scale might contain a conservative bias Further, it was suggested that responses to the items may be determined by the individual's political and social ideology, which in turn are influenced by the political and social norms to which he has been exposed The sample consisted of one parent and a college-aged child from 60 upper-middle-class families in which the parent was visible in the community for political and social participation, half the parents interviewed were liberal, and half conservative in their political views A number of measures of political and social participation were administered, along with a shortened version of the I-E scale The findings of the study supported the contention that the “internal” items on the I-E scale are more congenial to persons holding conservative political views than for those holding liberal views. Perceived internal causality, as measured by the I-E scale, was found to be nonsignificantly correlated with any of the measures of political participation for the parent sample, with five of the six correlations being in the opposite direction from that predicted by social learning theory The results of the study were discussed in terms of White's distinction between the “moralizer” and “reformer” approach to social problems The validity of the I-E scale as a measure of a stable personality trait was called into question, as was its usefulness in predicting complex social behavior  相似文献   
13.
Escape behavior under different fixed ratios and shock intensities   总被引:1,自引:1,他引:0       下载免费PDF全文
The effects of ratio length and shock intensity on bar pressing were examined in three rats in two escape-from-shock experiments. In Experiment I, shock intensity was held constant while the schedule was varied from FR 1 to FR 20. The latency of the first escape response increased with FR length while the escape rate, computed as over-all rate in shock minus latency of the first response, decreased at FR 20. In Experiment II, the schedule was held constant at FR 5 while shock intensity was manipulated. Latency decreased as intensity increased, while escape rate increased with intensity, passing through a maximum for two subjects. Responses occurring during the last 100 sec of the 2-min escape period decreased as the FR increased for all subjects, and decreased as shock intensity increased for two subjects.  相似文献   
14.
15.
Projects importing technology to lesser developed nations may raise five important concerns: famine resulting from substitution of cash crops for subsistence crops, the use of products banned in the United States but permitted overseas, the use of products safe in the U.S. but unsafe under local conditions, ecological consequences of technological change, and cultural disruption caused by displacing traditional ways of life. Are engineers responsible for the foreseeable hunger, environmental degradation, cultural disruption, and illness that results from the project? Are engineers guilty of paternalism if they refuse to accept the project for that reason? Criteria are given to help engineers assess the extent of their responsibility when working in lesser developed nations.  相似文献   
16.
Relationship-centered counseling is a development in the client-centered tradition. It represents a humanistic integration that gives primacy to the humanizing and counseling relationship, conceives technical expertise as the instrumental extension of relationship, and affirms the necessity for an in-depth synthesis of both for effective counseling. Significant findings from contemporary process and outcome research are presented as supportively consistent with the relationship-centered integration, which has implications for research, practice, and training.  相似文献   
17.
This study explores the moderating effects of early adult character style on correlations between social relationships in adolescence and midlife psychological health. Participants were drawn from the ongoing longitudinal studies at the Institute of Human Development. Individuals who beat the odds of an adverse environment and those who failed to capitalize on beneficial environments were identified and compared at age 30 on the California Psychological Inventory, the Meredith-Millsap Component Scores, and the Thematic Apperception Test. Social relatedness and personal independence were characteristics at age 30 of all subjects who went on to develop good psychological health by age 50. Social relatedness was more associated with overcoming a difficult environment, while self-assurance was more associated with capitalizing on a good one.  相似文献   
18.
The historical interplay between psychiatry and religion is placed in a contemporary context here. In their zeal to embrace new discoveries and technologies in neurophysiology, modern psychiatrists are losing sight of spiritual and cultural dimensions. From a biological perspective, there is confusion about what constitutes a cause, a concomitant, or a consequence of mental illness. Computer metaphors are being used to explain mental illness. This article examines such trends and questions whether, in the decade of the brain, psychiatry is in danger of losing its soul.  相似文献   
19.
20.
Previous studies have shown that unexplained deviations in maternal serum multiple marker screening (MMS) generate considerable anxiety during the remainder of pregnancy. While the role of education in decreasing anxiety is documented, to date there has been no prospective evaluation of which educational practices might minimize this emotional stress. In a pilot study, we prospectively examined the effects on anxiety and knowledge by providing information about MMS (1) by genetic counselor, (2) by pamphlet, and (3) by primary physician. Women randomized to one of these three modalities were administered the Spielberger State- Trait Anxiety Inventory [STAI] and knowledge questionnaires at their initial obstetrics visit, at their second visit after educational intervention and 1–2 weeks after MMS results were provided to patients. Education resulted in an increase in knowledge and post-education knowledge was different between educational modalities. Anxiety declined in patients educated through genetic counseling or a pamphlet.  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