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   3926篇
  免费   148篇
  国内免费   1篇
  2022年   20篇
  2021年   20篇
  2020年   48篇
  2019年   65篇
  2018年   91篇
  2017年   96篇
  2016年   108篇
  2015年   96篇
  2014年   94篇
  2013年   394篇
  2012年   168篇
  2011年   169篇
  2010年   139篇
  2009年   118篇
  2008年   164篇
  2007年   200篇
  2006年   159篇
  2005年   128篇
  2004年   128篇
  2003年   144篇
  2002年   146篇
  2001年   74篇
  2000年   62篇
  1999年   74篇
  1998年   70篇
  1997年   57篇
  1996年   65篇
  1995年   41篇
  1994年   51篇
  1993年   46篇
  1992年   64篇
  1991年   51篇
  1990年   54篇
  1989年   38篇
  1988年   34篇
  1987年   41篇
  1986年   41篇
  1985年   45篇
  1984年   52篇
  1983年   40篇
  1982年   51篇
  1981年   41篇
  1980年   34篇
  1979年   40篇
  1978年   27篇
  1977年   32篇
  1976年   30篇
  1975年   19篇
  1974年   23篇
  1973年   19篇
排序方式: 共有4075条查询结果,搜索用时 15 毫秒
41.
42.

Two experiments investigated the role of lithium-mediated environmental conditioning on instrumental performance. Experiment 1 demonstrated that a novel taste consumed in one arm of a T maze prior to lithium-induced toxicosis reduced performance in this environment whereas similar aversions conditioned in the home cage failed to alter maze performance. Experiment 2 showed that maze performance in a straight alleyway was decremented during extinction only in a group that actually traversed the alley prior to drinking saccharin and receiving lithium injections. This demonstrated that the instrumental decrement observed in Experiment 1 was due not only to the presence of an unpalatable flavor in the goalbox during the test.

  相似文献   
43.
The purpose of this study was to determine whether patients with focal brain damage can learn anything about a new word, and if so, whether selected aspects of the new word are acquired depending on the nature of the patient's language processing deficit. In the context of drawing pictures with a number of felt pens identical in all respects except color, agrammatic Broca's aphasics and fluent aphasics were exposed to the new word "bice," an adjective referring to the dark green portion of the color spectrum. Our findings revealed that brain-damaged patients can engage in lexical acquisition, but Broca's aphasics and fluent aphasics apparently learn about different aspects of the new word. Specifically, on successive exposures to "bice," both Broca's aphasics and fluent aphasics exhibit progressively more accurate hypotheses for identifying a bice-colored object. During subsequent assessments, agrammatic aphasics reveal on a metalinguistic judgment task their significant difficulty appreciating the grammatical form class of "bice"; on an object classification task, fluent aphasics are significantly impaired in their classification of bice-colored objects as "bice." Taken together, these unique word-learning profiles reinforce earlier observation on the selective nature of language processing deficits after focal left-hemisphere insult, and support the claim that separate language processing devices may be selectively compromised in different groups of aphasics. The relationship between syntactic and lexical semantic processing is discussed.  相似文献   
44.
45.
Several theories have been presented that predict differences between women and men in attitudes toward the environment due to differences in sex roles. Research on which these theories can be tested has tended to examine general environmental concern, and the results have generally been weak and inconclusive. Using an approach suggested in the literature, this study examines sex differences in concern and knowledge, using multi-item scales for each, about one environmental issue — acid rain. The results contradict the theories being tested, however: if there is a sex difference, men are found to be more concerned and knowledgeable about the environmental problem.  相似文献   
46.
This study explored the relationship among love deprivation, Performance greater than Verbal discrepancy, and violent crime in a sample of juvenile probationers. Love deprivation and P greater than V discrepancy was significantly related to violent delinquency after adjusting for the effects of both race and social class, two variables often closely associated with violent delinquency. Also, love deprivation was strongly related to P greater than V discrepancy. We speculated that high performance IQ scores relative to verbal scores are a function of a lack of disruption in the short-term memory mechanisms of high P greater than V subjects, that this nondisruption is a function of hyporeactive autonomic nervous systems, and that this hyporeactivity could itself be a function of early love deprivation.  相似文献   
47.
One theory of love (J. A. Lee, The Colors of Love: An Exploration of the Ways of Loving, Don Mills, Ontario: New Press, 1973) assumes at least six different attitudinal orientations toward love. Based on Lee's approach, recent research (e.g., C. Hendrick & S. Hendrick, “A Theory and Method of Love,” Journal of Personality and Social Psychology, 1986, 50, pp. 392–402) has found consistent sex differences in love attitudes. Other research has found comparable sex differences in sexual permissiveness and other sexual attitudes. The present study explored the possibility that gender role orientation might be related to differences in love and sexual attitudes. A sample of 286 college students completed the Bem Sex Role Inventory (BSRI), Love Attitudes Scale, Sexual Attitudes Scale, and the Rosenberg Self-Esteem Scale. Correlational analyses revealed many significant associations among love and sexual attitudes, self-esteem, and masculinity and femininity. Subjects were also classified according to gender role as androgynous, masculine, feminine, or undifferentiated, according to BSRI scores. Analyses of variance showed effects for both sex of subjects and gender role orientation on several of the dependent measures. The pattern of the results suggested that sex-stereotyped couples may have difficulties in romantic relationships because of the discrepancies in their love and sexual attitudes. An argument was made in support of the recent trend toward a multidimensional concept of gender role orientation.  相似文献   
48.
The term pioneer is used for girls aspiring to male-dominated careers. This longitudinal study assesses the career choices of 68 middle-class girls during childhood (8–13 years, Phase I) and again during adolescence (13–18 years, Phase II), and investigates the relation between pioneering career choice and personal and family characteristics. Subjects were originally selected for exposure vs nonexposure to exogenous hormones during pregnancy. In childhood, pioneers were somewhat older, were more often persistent tomboys, had higher IQs, and had parents with higher educational attainment. In adolescence, paternal education was the only variable that showed the same relation to career choice. Adolescent girls who had wanted to get married at the time of the childhood assessment were now less likely to choose pioneering careers. Adolescent pioneers also had higher educational aspirations than nonpioneers and less likely anticipated being married within ten years than nonpioneers. A number of statistically borderline relationships were also observed: pioneers had somewhat fewer older brothers than nonpioneers, less often came from homes in which traditional femininity was stressed, and more frequently had mothers who had worked outside the home throughout their daughters' school years than mothers of nonpioneers. Prenatal exposure to exogenous sex hormones was not related to career choice during either childhood or adolescence.  相似文献   
49.
Repeated object loss drove Sylvia Plath to create, and what she created were her greatest, and best-known poems, collected in the book Ariel. Yet the compulsion to create alternated with the compulsion to destroy. Her suicidal impulses were as intense as her poetic impulses (see Bach, 1985, on the "Marquis de Sade"). How these two contrasting impulses counter-balanced each other, until self-destruction took the lead, is the story of Sylvia Plath. What remains with us is the puzzle of her despair. This puzzle can only be pieced together by looking at the internal object relations of the father-daughter bond, which germinated like a ghost and spector within Sylvia Plath's soul.  相似文献   
50.
People differ in the degree to which they become inhibited and avoidant when they feel socially anxious This study explored the hypothesis that characterological attributions for one's feelings of nervousness in social settings are related to social inhibition and avoidance In a preliminary study, the dimensions people use to explain their feelings of nervousness and relaxation were determined One hundred and twenty-five subjects then completed measures of social anxiousness, inhibition, and avoidance, and made attributions for feeling nervous and relaxed in 10 interpersonal scenarios As predicted, attributions of nervousness to characterological factors, such as ability and personality traits, correlated positively with social inhibition and avoidance Unexpectedly, behavioral attributions for nervousness also predicted inhibition and avoidance  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