全文获取类型
收费全文 | 61411篇 |
免费 | 1134篇 |
国内免费 | 3篇 |
专业分类
62548篇 |
出版年
2019年 | 706篇 |
2018年 | 966篇 |
2017年 | 1038篇 |
2016年 | 1051篇 |
2015年 | 777篇 |
2014年 | 897篇 |
2013年 | 4666篇 |
2012年 | 1613篇 |
2011年 | 1771篇 |
2010年 | 1198篇 |
2009年 | 1167篇 |
2008年 | 1640篇 |
2007年 | 1573篇 |
2006年 | 1475篇 |
2005年 | 1288篇 |
2004年 | 1204篇 |
2003年 | 1299篇 |
2002年 | 1256篇 |
2001年 | 1822篇 |
2000年 | 1769篇 |
1999年 | 1382篇 |
1998年 | 696篇 |
1997年 | 647篇 |
1996年 | 626篇 |
1995年 | 617篇 |
1992年 | 1184篇 |
1991年 | 1149篇 |
1990年 | 1073篇 |
1989年 | 1016篇 |
1988年 | 1016篇 |
1987年 | 996篇 |
1986年 | 996篇 |
1985年 | 1054篇 |
1984年 | 888篇 |
1983年 | 775篇 |
1981年 | 640篇 |
1979年 | 907篇 |
1978年 | 731篇 |
1977年 | 673篇 |
1976年 | 666篇 |
1975年 | 795篇 |
1974年 | 893篇 |
1973年 | 969篇 |
1972年 | 742篇 |
1971年 | 694篇 |
1970年 | 645篇 |
1969年 | 672篇 |
1968年 | 800篇 |
1967年 | 726篇 |
1966年 | 767篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
Cerella (1991) has argued that the performance of older adults in the Fisk and Rogers (1991) study is a linear function of the performance of younger adults that is independent of task-specific cognitive requirements. We demonstrate that this is not the case. First, we show that the scatter plot analyses used by Cerella can hide the very task-specific age-related slowing they were designed to reveal. Second, we demonstrate that the percentage of variance explained by such analyses can be misleading. Third, we show that there are reliable differences across tasks in the parameters relating younger and older adults' performance. Finally, we argue that the general, task-independent proportionate slowing that Cerella suggested explains so much of the variance in age-related performance is actually an average slowing that is a function of a relatively small task-independent and a relatively large task-dependent factor. 相似文献
132.
S L Young M S Fanselow 《Journal of experimental psychology. Animal behavior processes》1992,18(4):400-413
Conditional stimuli (CS) associated with painful unconditional stimuli (US) produce a naloxone-reversible analgesia. The analgesia serves as a negative-feedback regulation of fear conditioning that can account for the impact of US intensity and CS predictiveness on Pavlovian fear conditioning. In Experiment 1 training under naloxone produced learning curves that approached the same high asymptote despite US intensity. Shifting drug treatment during acquisition had effects that paralleled US intensity shifts. In Experiment 3 naloxone reversed Hall-Pearce (1979) negative transfer using a contextual CS, indicating that conditional analgesia acquired during the CS-weak-footshock phase retards acquisition in the CS-strong-footshock phase. Experiment 5 used a tone CS in both a latent-inhibition and a negative-transfer procedure. Only negative transfer was blocked by naloxone. Therefore, negative transfer but not latent inhibition is mediated by a reduction of US processing. 相似文献
133.
M C Alvarado J W Rudy 《Journal of experimental psychology. Animal behavior processes》1992,18(2):145-153
Little is known about the conditions that encourage animals to learn to use configural associations to guide their behavior or the consequences of such learning for transfer. This study provided some information about these issues by examining how rats solve the transverse-patterning problem, which requires a configural solution (Spence, 1952). Animals had to concurrently solve 3 simultaneous visual discriminations, represented abstractly as A+ versus B-, B+ versus C-, and C+ versus A-. Experiment 1 indicated that rats use a configural solution even when the problems have an elemental solution, provided that the significance of 1 element (e.g., B) shared by 2 problems is ambiguous (e.g., A+/B-; and B+/C-). Experiments 2 and 3 suggested that, when stimulated to use a configural solution by solving the A+/B- and B+/C- problems, rats transfer the configural solution to problems that have no ambiguous elements. 相似文献
134.
A multivariate hierarchical model of specific cognitive abilities was fitted to data from 7-year-old adopted and nonadopted sibling pairs in the Colorado Adoption Project in order to assess differential genetic influence on specific mental abilities. Model fitting results and Schmid-Leiman (Schmid & Leiman, 1957) transformations reveal significant heritable variation for verbal, spatial, and memory factors independent of general cognitive ability for the eight ability tests examined. In contrast, environmental influences are primarily measure-specific. The results suggest genetic effects in middle childhood that differentially influence mental ability scores. 相似文献
135.
Patterns of coping with cancer. 总被引:12,自引:0,他引:12
We identified five patterns of coping in a sample of 603 cancer patients: "seeking or using social support," "focusing on the positive," "distancing," "cognitive escape-avoidance," and "behavioral escape-avoidance." Relationships of these coping patterns to sociodemographic characteristics, medical factors, stress appraisals, psychotherapeutic experience, and emotional distress were tested using correlational and regression techniques. Type of cancer, time since diagnosis, and whether a person was currently in treatment had few or no relationships to coping. The specific cancer-related problem (e.g., pain, fear of future) was also not associated with how individuals coped. Perceptions of its stressfulness, however, were related to significantly more coping through social support and more of both forms of escape-avoidance. Coping through social support, focusing on the positive, and distancing was associated with less emotional distress, whereas using cognitive and behavioral escape-avoidance was associated with more emotional distress. Implications of the results for understanding coping processes and intervention with cancer patients are discussed. 相似文献
136.
A 3×2×2 incomplete factorial design was employed to test the effects of sex, dominance, and their interaction on leader emergence. The factors included dominance distribution (high/high, high/low, middle/middle), sex (male-female), and dyad composition (mixed sex-same sex). The subjects were all Caucasians and were pretested on the California Psychological Inventory Dominance Scale. The data revealed that dominance was a predictor of leader emergence in same-sex conditions where high-dominant individuals assumed the role of leader in much greater proportions than their low-dominant partners. In mixed-sex dyads, sex appeared to be a more potent predictor with males becoming leaders at levels greater than would be suspected given dominance levels. 相似文献
137.
TOWARD A FEMINIST UNDERSTANDING OF WOMEN AND POWER 总被引:1,自引:0,他引:1
Both psychologists and feminists believe power is an important and ubiquitous concept, yet its definition and scope eludes both groups. In this introduction to a special issue on women and power, we suggest three points to help organize and interpret research in the area. First, definitions of power should center around the distinction between "power-over," the domination and control of one person or group over another, and "power-to" or personal empowerment. Second, power can be analyzed at different levels—societal, organizational, interpersonal, and individual—and, importantly, these levels interact. Third, power differences frequently underlie what appear to be gender differences in behavior; as society is currently configured, power and gender are never independent. Although the articles in this special issue often ask more questions than they answer, the present volume adds a feminist perspective to the psychological study of power. 相似文献
138.
139.
We demonstrate the power of a situated identity perspective for understanding the different attributional patterns of women and men in an academic setting and their differential experiences in the workplace. Two explanations for the gender difference found in attributions of success are considered. This difference may be due either to different identities being attributed to men and women employing the same explanations for success and failure, or to the inconsistency between actions that confirm a professional (academic) identity and women's gender identity. The results of this survey of senior social science faculty men support the latter explanation but not the former. An editorial acceptance was seen as more professional but less feminine than a rejection. In the eyes of senior colleagues, the modest account of success, typical of women academics, enhances femininity but detracts from professionalism. The self-serving account typical of men makes the offerer appear less feminine but more professional. Thus in their situated identity claims, successful academic women, but not men, must choose between their professional and gender identities. Despite the movement of women into university social science positions, the role of academic has a masculine face.Order of authors was determined by a coin toss. 相似文献
140.