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   52323篇
  免费   2162篇
  国内免费   19篇
  54504篇
  2020年   536篇
  2019年   656篇
  2018年   933篇
  2017年   918篇
  2016年   944篇
  2015年   645篇
  2014年   852篇
  2013年   3855篇
  2012年   1520篇
  2011年   1672篇
  2010年   943篇
  2009年   1022篇
  2008年   1444篇
  2007年   1440篇
  2006年   1338篇
  2005年   1178篇
  2004年   1161篇
  2003年   1085篇
  2002年   1085篇
  2001年   1688篇
  2000年   1604篇
  1999年   1241篇
  1998年   607篇
  1997年   513篇
  1992年   979篇
  1991年   917篇
  1990年   954篇
  1989年   905篇
  1988年   873篇
  1987年   820篇
  1986年   859篇
  1985年   951篇
  1984年   754篇
  1983年   690篇
  1982年   553篇
  1981年   519篇
  1979年   800篇
  1978年   600篇
  1977年   498篇
  1976年   527篇
  1975年   699篇
  1974年   795篇
  1973年   821篇
  1972年   644篇
  1971年   592篇
  1970年   563篇
  1969年   600篇
  1968年   742篇
  1967年   645篇
  1966年   658篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
271.
To test Coyne's (1976b) theory of depression, students' levels of depressive symptoms, reassurance seeking, and self-esteem were assessed at Time 1, and their same-gender roommates' appraisals of them were assessed 5 weeks later. Mildly depressed students engaged in the type of reassurance seeking described by Coyne. Among men, but not women, mildly depressed students were rejected if they strongly sought reassurance and had low self-esteem but not if they did not seek reassurance or had high self-esteem. Although induction of depressed symptoms in roommates did occur, this contagion effect did not account for the depression-rejection relationship. The prediction that unsupportive, intolerant, or unempathic others would be particularly likely to respond with rejection to reassurance-seeking depressed students with low self-esteem received partial support. Implications for future work on the interpersonal aspects of depression are discussed.  相似文献   
272.
This article uses a psychoanalytic ego-psychological framework to examine the regression experienced by an individual group member and the defenses mobilized to counter it, focusing in particular on the defensive functions of constituting leadership somewhere in the group. The leader, regarded as an internal object in the member's object world, is hypothesized to be a combination of projected and personified part-objects and at the same time an integrating whole object. Various phenomena of group life are discussed from this viewpoint, notably the lability of the relationship with the leader, the externalization of various endopsychic regulations, and the conditions supporting the defensive utility of the leader for the group member. The foundation for the emergence of social roles and consensual perception of the group and its leadership becomes apparent. A strictly intrapsychic view is maintained throughout.  相似文献   
273.
Effortful and automatic memory task performances were examined in 36 schizophrenic patients and 18 normal control Ss. Tasks included free recall, recognition, and frequency estimation. Patients demonstrated impairment in recall, in recognition, in semantic encoding, and in frequency estimation. Deficits were observed across tasks despite differences in attentional demands. The results suggest a basic compromise of memory function, which is consistent with recent neuroimaging evidence of structural or physiological abnormalities in frontal and temporal lobe structures in schizophrenia.  相似文献   
274.
A 5-year longitudinal study investigated the interrelationships among children's experiences of depressive symptoms, negative life events, explanatory style, and helplessness behaviors in social and achievement situations. The results revealed that early in childhood, negative events, but not explanatory style, predicted depressive symptoms; later in childhood, a pessimistic explanatory style emerged as a significant predictor of depressive symptoms, alone and in conjunction with negative events. When children suffered periods of depression, their explanatory styles not only deteriorated but remained pessimistic even after their depression subsided, presumably putting them at risk for future episodes of depression. Some children seem repeatedly prone to depressive symptoms over periods of at least 2 years. Depressed children consistently showed helpless behaviors in social and achievement settings.  相似文献   
275.
This research evaluated the relationship between pain and sleep problems, and the role of pain and sleep problems in depression, in a sample of 242 patients who had been diagnosed with definite or classical rheumatoid arthritis (RA). Patients completed the Pain scale of the Arthritis Impact Measurement Scales, the Center for Epidemiological Studies Depression Scale, and self-reports of sleep disturbance at two data waves over a 2-year interval. Cross-sectional multiple regression analysis revealed that the sleep problems variable was independently associated with depression at Time 1. Longitudinal multiple regression analyses demonstrated that prior pain predicted subsequent adverse changes in sleep problems, whereas sleep problems did not affect pain over time, and prior pain and the interaction of high pain and high sleep problems were independently associated with depression from Time 1 to Time 2. These data suggest that pain may exacerbate sleeping difficulty in RA patients, and that both factors may contribute to depression over time.  相似文献   
276.
The past fifteen years have seen the development of a considerable research literature on the social psychology of procedural justice (see Lind & Tyler, 1988, for a review). Procedural justice research reveals some serious shortcomings in the exchange theories that have traditionally dominated Western analyses of the social psychology of groups, and in so doing, the procedural justice literature has important ramifications for cross-cultural psychology. Results from a number of studies conducted in the United States and Western Europe show that individualistic, self-interest based models of human behaviour are insufficient to explain procedural justice phenomena. Instead, procedural justice effects frequently reveal strong group-oriented concerns and motivations even in cultural contexts generally thought to be characterized by individualistic orientations. The research literature also shows that if a group's procedures are judged to be fair, people are more likely to show group-oriented behaviour and to hold more favourable attitudes toward the group and its leaders. These findings have led to the development of a theory of justice judgments—the Lind and Tyler group-value theory—which is based on group norms and relations rather than on social exchange theory. We describe a general model of social behaviour that integrates group- and individually-oriented behaviour, and we discuss the implications of the model for social and cross-cultural psychology.  相似文献   
277.
Twenty treated and 18 untreated spider phobics were exposed to a series of 72 slides. Three different categories of slides were used: phobia-relevant slides (spiders), alternative fear-relevant slides (weapons), and neutral slides (flowers). Slides were randomly paired with either a shock, a tone, or nothing at all. Despite the absence of a systematic correlation between slides and outcomes, untreated phobics strongly overestimated the covariation between spider slides and shock. Treated phobics did not show a covariation bias, suggesting that such bias can be modulated by behavioral treatment. In addition, untreated subjects were more confident about their contingency estimates than were treated subjects. The present results fit with earlier studies.  相似文献   
278.
The present study explores how stimulus variability in speech production influences the 2-month-old infant's perception and memory for speech sounds. Experiment 1 focuses on the consequences of talker variability for the infant's ability to detect differences between speech sounds. When tested with high-amplitude sucking (HAS) procedure, infants who listened to versions of a syllable, such as [symbol: see text], produced by 6 male and 6 female talkers, detected a change to another syllable, such as [symbol: see text], uttered by the same group of talkers. In fact, infants exposed to multiple talkers performed as well as other infants who heard utterances produced by only a single talker. Moreover, other results showed that infants discriminate the voices of the individual talkers, although discriminating one mixed group of talkers (3 males and 3 females) from another is too difficult for them. Experiment 2 explored the consequences of talker variability on infants' memory for speech sounds. The HAS procedure was modified by introducing a 2-min delay period between the familiarization and test phases of the experiment. Talker variability impeded infants' encoding of speech sounds. Infants who heard versions of the same syllable produced by 12 different talkers did not detect a change to a new syllable produced by the same talkers after the delay period. However, infants who heard the same syllable produced by a single talker were able to detect the phonetic change after the delay. Finally, although infants who heard productions from a single talker retained information about the phonetic structure of the syllable during the delay, they apparently did not retain information about the identity of the talker. Experiment 3 reduced the range of variability across talkers and investigated whether variability interferes with retention of all speech information. Although reducing the range of variability did not lead to retention of phonetic details, infants did recognize a change in the gender of the talkers' voices (from male to female or vice versa) after a 2-min delay. Two additional experiments explored the consequences of limiting the variability to a single talker. In Experiment 4, with an immediate testing procedure, infants exposed to 12 different tokens of one syllable produced by the same talker discriminated these from 12 tokens of another syllable.(ABSTRACT TRUNCATED AT 400 WORDS)  相似文献   
279.
Thinking through uncertainty: nonconsequential reasoning and choice.   总被引:1,自引:0,他引:1  
When thinking under uncertainty, people often do not consider appropriately each of the relevant branches of a decision tree, as required by consequentialism. As a result they sometimes violate Savage's sure-thing principle. In the Prisoner's Dilemma game, for example, many subjects compete when they know that the opponent has competed and when they know that the opponent has cooperated, but cooperate when they do not know the opponent's response. Newcomb's Problem and Wason's selection task are also interpreted as manifestations of nonconsequential decision making and reasoning. The causes and implications of such behavior, and the notion of quasi-magical thinking, are discussed.  相似文献   
280.
To teach conservation to mildly retarded, preoperational preadolescents (9 to 12 years old), a number-representational system was used to mediate the invariance of quantity as part of "equality-rule" training. Before viewing a perceptually misleading configuration of either two equal quantities or two unequal quantities entailing the dimensions of number or length, participants learned that equality involved the assignment of two identical numbers and inequality the assignment of two different numbers. These numbers were then applied to the actual quantities and became the basis for rule statements that were rehearsed, memorized, and subject-generated each time the quantities were transformed into a new configuration. Following equality training, correct judgments and verbal justifications of conservation were high (M greater than or equal to 85%) during both immediate and delayed post-tests and for near-generalization (number and length) and far-generalization (weight, liquid substance, and solid substance) tasks. In contrast, the post-test levels of comparable participants given learning-set (LS) training, LS plus verbal-rule training (a combination of statements about identity, negation, and compensation), or no training at all were substantially and significantly lower. Equality training is of theoretical and practical interest because of its potential to teach a symbolic representational rule that directly and meaningfully articulates the quantitative properties of objects and counteracts the overreliance on task-specific and faulty perceptual cues inherent in the conservation task.  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