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   13391篇
  免费   276篇
  国内免费   86篇
  2012年   1358篇
  2011年   1568篇
  2010年   333篇
  2009年   159篇
  2008年   1192篇
  2007年   1182篇
  2006年   1134篇
  2005年   887篇
  2004年   818篇
  2003年   812篇
  2002年   689篇
  2001年   466篇
  2000年   536篇
  1999年   224篇
  1998年   60篇
  1997年   48篇
  1996年   44篇
  1995年   27篇
  1994年   47篇
  1993年   48篇
  1992年   52篇
  1991年   57篇
  1990年   63篇
  1989年   65篇
  1988年   73篇
  1987年   60篇
  1986年   55篇
  1985年   72篇
  1984年   38篇
  1983年   56篇
  1982年   43篇
  1981年   49篇
  1980年   21篇
  1979年   31篇
  1978年   39篇
  1965年   35篇
  1964年   26篇
  1963年   32篇
  1959年   41篇
  1958年   129篇
  1957年   128篇
  1956年   114篇
  1955年   92篇
  1954年   99篇
  1953年   82篇
  1952年   83篇
  1951年   75篇
  1950年   64篇
  1949年   52篇
  1948年   43篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
891.
This study investigated listening comprehension and working memory abilities in children with attention-deficit hyperactivity disorder (ADHD), presenting with and without language impairments (LI). A 4-group design classified a community sample (n = 77) of boys aged 9–12 into ADHD, ADHD + LI, LI, and Normal groups. Children completed tests of basic language and cognitive skills, verbal and spatial working memory, and passage-level listening comprehension. Multivariate analyses and post hoc comparisons indicated that ADHD children who did not have co-occurring LI comprehended factual information from spoken passages as well as normal children, but were poorer at comprehending inferences and monitoring comprehension of instructions. ADHD children did not differ from normal children in verbal span, but showed significantly poorer verbal working memory, spatial span, and spatial working memory. The ADHD + LI and LI groups were most impaired in listening comprehension and working memory performance, but did not differ from each other. Listening comprehension skills were significantly correlated with both verbal and spatial working memory, and parent–teacher ratings of inattention and hyperactivity/impulsivity. Findings that children with ADHD but no LI showed subtle higher-level listening comprehension deficits have implications for both current diagnostic practices and conceptualizations of ADHD.  相似文献   
892.
This study examined demographic characteristics, social competence, and behavior problems in clinic-referred children with gender identity problems in Toronto, Canada (N = 358), and Utrecht, The Netherlands (N = 130). The Toronto sample was, on average, about a year younger than the Utrecht sample at referral, had a higher percentage of boys, had a higher mean IQ, and was less likely to be living with both parents. On the Child Behavior Checklist (CBCL), both groups showed, on average, clinical range scores in both social competence and behavior problems. A CBCL-derived measure of poor peer relations showed that boys in both clinics had worse ratings than did the girls. A multiple regression analysis showed that poor peer relations were the strongest predictor of behavior problems in both samples. This study—the first cross-national, cross-clinic comparative analysis of children with gender identity disorder—found far more similarities than differences in both social competence and behavior problems. The most salient demographic difference was age at referral. Cross-national differences in factors that might influence referral patterns are discussed.  相似文献   
893.
This work employs Evoked Potential techniques as 19 participants are confronted with sentences that have the potential to produce scalar implicatures, like in Some elephants have trunks. Such an Underinformative utterance is of interest to pragmatists because it can be considered to have two different truth values. It can be considered true when taken at face value but false if one were to treat Some with the implicature Not All. Two accounts of implicature production are compared. The neo-Gricean approach (e.g., Levinson, 2000) assumes that implicatures intrude automatically on the semantics of a term like Some. Relevance Theory (Sperber & Wilson, 1985/1996) assumes that implicatures are effortful and not automatic. In this experiment, the participants are presented with 25 Underinformative sentences along with 25 sentences that are Patently True (e.g. Some houses have bricks) and 25 that are Patently False (e.g. Some crows have radios). As reported in an earlier study (Noveck, 2001), Underinformative sentences prompt strong individual differences. Seven participants here responded true to all (or nearly all) of the Underinformative sentences and the remaining 12 responded false to all (or nearly all) of them. The present study showed that those who responded false to the Underinformative sentences took significantly longer to do so that those who responded true. The ERP data indicate that: (a) the Patently True and Patently False sentences prompt steeper N400's--indicating greater semantic integration--than the Underinformative sentences and that (b) regardless of one's ultimate response to the Underinformative sentences, the N400's were remarkably flat, indicating no particular reaction to these sentences. Collectively, the data are taken to show that implicatures are part of a late-arriving, effort-demanding decision process.  相似文献   
894.
The unification of mind: Integration of hemispheric semantic processing   总被引:1,自引:0,他引:1  
Seventy-six participants performed a visual half-field lexical decision task at two different stimulus onset asynchronies (50 or 750 ms). Word targets were primed either by a highly associated word (e.g., CLEAN-DIRTY), a weakly associated word (e.g., CLEAN-TIDY), or an unrelated word (e.g., CLEAN-FAMILY) projected to either the same or opposite visual field (VF) as the target. In the short SOA, RVF-left hemisphere primes resulted in high associate priming regardless of target location (ipsilateral or contralateral to the prime) whereas LVF-right hemisphere primes produced both high and low associate priming across both target location conditions. In the long SOA condition, contralateral priming patterns converged, demonstrating only high associate priming in both VF locations. The results of this study demonstrate the critical role of interhemispheric transfer in semantic processing and indicate a need to elaborate current models of semantic processing.  相似文献   
895.
Income is only weakly associated with both subjective well-being (SWB) and job satisfaction in the United States, a surprising finding in light of the importance placed on financial status in capitalistic societies. To explore this further, the authors examined intrinsic and extrinsic work orientations as potential moderators of the effects of financial compensation on SWB and job satisfaction. Master's of business administration students (N = 124) completed measures of work orientation and, 4 to 9 years later, reported their current salary, SWB, and job satisfaction. As predicted, individuals high in extrinsic orientation experienced higher SWB and job satisfaction to the degree that they earned more money, whereas those high in intrinsic orientation were lower on SWB at higher income levels. These findings are discussed in terms of the Values as Moderators Perspective of SWB and Cognitive Evaluation Theory.  相似文献   
896.
Philosophers, psychologists, and religious teachers have suggested that imagining yourself in another's place will stimulate moral action. The authors tested this idea in two different situations. In Experiment 1, participants had the opportunity to assign themselves and another research participant to tasks, with one task clearly more desirable than the other. Imagining oneself in the other's place did little to increase the morality (fairness) of the decision. A different form of perspective taking, imagining the other's feelings, increased direct assignment of the other to the desirable task, apparently due to increased empathy. In Experiment 2, participants confronted a different decision: either accept an initial task assignment that would give them highly positive consequences and the other participant nothing or change the assignment so they and the other would each receive moderately positive consequences. In this situation, imagining oneself in the other's place did significantly increase moral action.  相似文献   
897.
The relationship between optimism and two potential sources of optimistic beliefs--promotion pride (based on a history of success in promotion regulation) and prevention pride (based on a history of success in prevention regulation)--was explored. Optimism was more strongly related to promotion pride than prevention pride (controlling for neuroticism), consistent with past work showing that anticipating success increases eagerness motivation but decreases vigilance motivation. This suggests that the psychology of prevention regulators is not captured well by the existing literature on optimism. Although prevention pride does not predict self-reports of well-being, it does predict adaptive functioning independent of optimism, neuroticism, and promotion pride. Promotion pride uniquely predicted a sense of purpose in life or goal directedness. Both promotion and prevention pride predicted active coping. It is argued that promotion and prevention pride tell us something unique and important about the role of successful self-regulation in determining quality of life.  相似文献   
898.
In two studies, the authors investigated guilt as a response to group-based advantage. Consistent with its conceptualization as a self-focused emotion, White guilt was based in self-focused beliefs in racial inequality. Thus, guilt was associated with belief in White privilege (Study 1) and resulted from seeing European Americans as perpetrators of racial discrimination (Study 2). Just as personal guilt is associated with efforts at restitution, White guilt was predictive of support for affirmative action programs aimed at compensating African Americans. White guilt was not, however, predictive of support for noncompensatory efforts at promoting equality, such as affirmative action programs that increase opportunities (Study 2). In contrast, the other-focused emotion of group-based sympathy was a more general predictor of support for different affirmative action policies. Our findings demonstrate the benefits and limits of group-based guilt as a basis of support for social equality and highlight the value of understanding the specific emotions elicited in intergroup contexts.  相似文献   
899.
Three studies address unresolved issues in value-behavior relations. Does the full range of different values relate to common, recurrent behaviors? Which values relate more strongly to behavior than others? Do relations among different values and behaviors exhibit a meaningful overall structure? If so, how to explain this? We find that stimulation and tradition values relate strongly to the behaviors that express them; hedonism, power, universalism, and self-direction values relate moderately; and security, conformity, achievement, and benevolence values relate only marginally. Additional findings suggest that these differences in value-behavior relations may stem from normative pressures to perform certain behaviors. Such findings imply that values motivate behavior, but the relation between values and behaviors is partly obscured by norms. Relations among behaviors, among values, and jointly among values and behavior exhibit a similar structure. The motivational conflicts and congruities postulated by the theory of values can account for this shared structure.  相似文献   
900.
Coalition research generally assumes that people strive to maximize their share of the coalition payoff and that they exclude others from joining a coalition if these others are not needed to obtain the coalition payoff. In two experiments, the authors show that this view is too narrow and that willingness to include such others is dependent on the extent to which people feel that exclusion affects the payoff of the excluded player. This finding was moderated by social value orientations. Proselfs were not affected by the consequences for the excluded players. Prosocials were less willing to exclude others the more harmful were the consequences of exclusion. Results are related to research on social exclusion, the do-no-harm principle, and social value orientations.  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