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   53675篇
  免费   1360篇
  国内免费   19篇
  55054篇
  2020年   363篇
  2019年   500篇
  2018年   3952篇
  2017年   3326篇
  2016年   2842篇
  2015年   679篇
  2014年   625篇
  2013年   2816篇
  2012年   1550篇
  2011年   3380篇
  2010年   3090篇
  2009年   2118篇
  2008年   2589篇
  2007年   2976篇
  2006年   900篇
  2005年   933篇
  2004年   858篇
  2003年   836篇
  2002年   725篇
  2001年   1270篇
  2000年   1251篇
  1999年   887篇
  1998年   417篇
  1997年   342篇
  1996年   338篇
  1995年   333篇
  1994年   339篇
  1992年   739篇
  1991年   714篇
  1990年   676篇
  1989年   622篇
  1988年   592篇
  1987年   592篇
  1986年   556篇
  1985年   627篇
  1984年   491篇
  1983年   383篇
  1979年   479篇
  1978年   351篇
  1977年   339篇
  1976年   314篇
  1975年   425篇
  1974年   428篇
  1973年   488篇
  1972年   386篇
  1971年   328篇
  1969年   334篇
  1968年   383篇
  1967年   339篇
  1966年   389篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
941.
The present study investigates effects of different types of instructions (high-rate, interval, and minimal) during training with a fixed-interval schedule as a function of prior acquired temporal knowledge. A pretest was used to assess 4 1/2- and 6-year-old children's ability to understand the temporal parameters of a fixed-interval schedule of reinforcement. The results as a whole show that the control exerted by instructions given by the experimenter or elaborated by the subjects themselves on fixed-interval performance of young children depends on the interaction of two factors: development of verbal self-control skills and mastery of knowledge required by the rules forming the instructions.  相似文献   
942.
Interactions of preschool and kindergarten friends and acquaintances   总被引:1,自引:0,他引:1  
The interactions of 4-, 5-, and 6-year-old friends and acquaintances in a peer teaching and game-playing situation were examined. The sample consisted of 102 children who were divided into pairs of same-age, same-sex friends or acquaintances using sociometrics. One child in each pair was randomly chosen to be the teacher and the other the learner. The teachers taught a novel board game to the learners. The most common teaching method was a combination of explaining and demonstrating the rules before the game began; older children gave more comprehensive instructions than younger children. At all ages, teachers were more likely than learners to take the first turn, issue commands, and change the rules. Friends were rated more involved with their partners, more emotionally expressive, and more competitive than acquaintances. Teachers who taught friends were rated more domineering than teachers who taught acquaintances, and learners who were taught by friends were rated more playful and friendly than learners taught by acquaintances.  相似文献   
943.
Victims' perceptions of social support: what is helpful from whom?   总被引:5,自引:0,他引:5  
Although research has demonstrated that social interactions influence psychological well-being, little is known about what specific actions victims of stressful life events experience as helpful or unhelpful. Wortman and Dunkel-Schetter (1979) previously suggested that victims frequently experience rejection, withdrawal, and communication problems with those close to them. To address these issues, 55 cancer patients were interviewed concerning the specific actions they found to be helpful or unhelpful from several potential support providers: spouse, other family members, friends, acquaintances, others with cancer, physicians, and nurses. The data indicated that the Wortman and Dunkel-Schetter victimization model applied better to interactions with friends and acquaintances than to interactions with close family members. In addition, support was found to be partially dependent on the source: Particular actions were perceived to be helpful from some but not other network members. Implications for theory and research on social support are discussed.  相似文献   
944.
How is personality stability possible amid the myriad of social changes and transformations that characterize a human life? We argue that by choosing situations that are compatible with their dispositions and by affiliating with similar others, individuals may set in motion processes of social interchange that sustain their dispositions across time and circumstance. To test this proposition we examined mate selection, using data on married couples from two ongoing longitudinal studies at the Institute of Human Development, University of California, Berkeley. Consistent with other research, the results point to homogamy as a basic norm in marriage. More important, the results show that marriage to a similar other promotes consistency in the intraindividual organization of personality attributes across middle adulthood. We offer some speculations for a more relational approach to the problem of individual continuity and change.  相似文献   
945.
Functional and dysfunctional impulsivity: personality and cognitive correlates   总被引:13,自引:0,他引:13  
The 3 studies reported here were designed to clarify the nature of the personality trait of impulsivity. Two types of impulsivity were distinguished. Dysfunctional impulsivity is the tendency to act with less forethought than most people of equal ability when this tendency is a source of difficulty; most previous work on impulsivity appears to have focused on this trait. Functional impulsivity, in contrast, is the tendency to act with relatively little forethought when such a style is optimal. The present work indicates that these two tendencies are not highly correlated and that they bear different relations both to other personality traits and to the manner in which certain basic cognitive processes are executed.  相似文献   
946.
Suspicion of ulterior motivation and the correspondence bias   总被引:2,自引:0,他引:2  
Three studies examined the hypothesis that when perceivers learn of the existence of multiple, plausibly rival motives for an actor's behavior, they are less likely to fall prey to the correspondence bias than when they learn of the existence of situational factors that may have constrained the actor's behavior. In the first 2 studies, Ss who learned that an actor was instructed to behave as he did drew inferences that corresponded to his behavior. In contrast, Ss who were led to suspect that an actor's behavior may have been motivated by a desire to ingratiate (Study 1), or by a desire to avoid an unwanted job (Study 2), resisted the correspondence bias. The 3rd study demonstrated that these differences were not due to a general unwillingness on the part of suspicious perceivers to make dispositional inferences. The implications that these results have for understanding attribution theory are discussed.  相似文献   
947.
Interpersonal competition can cause individuating processes   总被引:2,自引:0,他引:2  
Two experiments investigated whether competitors attend to and individuate opponents. Interdependence theories predict that people individuate others on whom their outcomes depend rather than stereotyping them; this has been tested for cooperative but not for competitive interdependence. Competition separates such phenomena as unit formation in cooperation from interdependence per se, posited to be the crucial variable. In two experiments, Ss expected to compete or not compete with a competent or incompetent fictitious subject. Ss commented into a tape recorder about the person's attributes, some inconsistent and some consistent with expectations. As predicted, competitors (a) increased attention to inconsistencies, (b) drew more dispositional inferences about inconsistencies, and (c) formed more varied impressions. The role of competition in undercutting expectancy-based impressions and intergroup vs. interpersonal competition are discussed.  相似文献   
948.
This article describes the development and initial evaluation of the A-Trait-Perception (ATP) score, a composite predictor for state anxiety. The ATP score is constructed from trait anxiety and situation perception data derived from the Endler Multidimensional Anxiety Scales (EMAS; Endler, Edwards, & Vitelli, 1989). ATP mathematically combines the individual's trait anxiety and situation perception profiles and adjusts these with a multiplier that reflects the individuals' sensitivity to particular types of situational elements in terms of state anxiety inducement. The utility of the resulting composite variable as a predictor of state anxiety was examined in the context of two field studies. Results of both studies indicated that the ATP variable offered a superior prediction of state anxiety, as compared to four individual trait anxiety facets (social evaluation, physical danger, ambiguous and daily routines). The theoretical import of these results is discussed.  相似文献   
949.
950.
Social support and immune function among spouses of cancer patients   总被引:8,自引:0,他引:8  
This study investigated whether social support was related to immune function among spouses of cancer patients. Effects of depression and negative life events were examined as potential mediators. Results showed evidence of greater immunocompetence on 2 of 3 dynamic measures: natural killer cytotoxicity and proliferation response to phytohemagglutinin among spouses who reported high levels of social support. All six components of social support assessed by the Social Provisions Scale (Cutrona & Russell, 1987) were strongly related to these indices of immune function. No evidence was found for mediation by either life events or depression.  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