全文获取类型
收费全文 | 34479篇 |
免费 | 1451篇 |
国内免费 | 25篇 |
出版年
2020年 | 446篇 |
2019年 | 491篇 |
2018年 | 750篇 |
2017年 | 685篇 |
2016年 | 737篇 |
2015年 | 503篇 |
2014年 | 689篇 |
2013年 | 3001篇 |
2012年 | 1190篇 |
2011年 | 1258篇 |
2010年 | 719篇 |
2009年 | 818篇 |
2008年 | 1118篇 |
2007年 | 1108篇 |
2006年 | 1074篇 |
2005年 | 961篇 |
2004年 | 898篇 |
2003年 | 918篇 |
2002年 | 874篇 |
2001年 | 1025篇 |
2000年 | 1002篇 |
1999年 | 793篇 |
1998年 | 423篇 |
1997年 | 417篇 |
1996年 | 369篇 |
1995年 | 349篇 |
1994年 | 314篇 |
1993年 | 330篇 |
1992年 | 617篇 |
1991年 | 566篇 |
1990年 | 610篇 |
1989年 | 516篇 |
1988年 | 464篇 |
1987年 | 475篇 |
1986年 | 504篇 |
1985年 | 591篇 |
1984年 | 494篇 |
1983年 | 412篇 |
1982年 | 343篇 |
1981年 | 330篇 |
1980年 | 302篇 |
1979年 | 419篇 |
1978年 | 370篇 |
1977年 | 306篇 |
1976年 | 300篇 |
1975年 | 391篇 |
1974年 | 444篇 |
1973年 | 433篇 |
1972年 | 330篇 |
1968年 | 316篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
921.
Intentions are an important concept in Artificial Intelligence and Cognitive Science. We present a formal theory of intentions and beliefs based on Discourse Representation Theory that captures many of their important logical properties. Unlike possible worlds approaches, this theory does not assume that agents are perfect reasoners, and gives a realistic view of their internal architecture; unlike most representational approaches, it has anobjective semantics, and does not rely on anad hoc labeling of the internal states of agents. We describe a minimal logic for intentions and beliefs that is sound and complete relative to our semantics. We discuss several additional axioms, and the constraints on the models that validate them. 相似文献
922.
Frank P. Gruba-McCallister Ph.D. 《Journal of religion and health》1993,32(2):107-120
The debate regarding the unitary versus multiple nature of the human person is examined with special attention to the division between conscious and unconscious. The roots of the unconscious are traced to the experience of alienation or feeling divided within. An existential analysis is provided in order to shed light on the nature of the unconscious. The experience of feeling divided within is explained as a metaphor that is taken literally. An existential-phenomenological explanation of the unconscious is provided which preserves the essential unity of the human person. 相似文献
923.
The MMPI and Rorschach are consistently ranked among the most widely used psychological assessment instruments across adolescent and adult clinical settings. Although there is an extensive research literature available on each instrument individually, relatively little research attention has been focused on the interrelationships between these measures. This article reviews the literature derived from 37 studies that have reported interrelationships between MMPI and Rorschach variables in adult populations. The results of these studies generally indicate limited or minimal relationships between the MMPI and Rorschach. A number of methodological issues, however, prevent drawing firm conclusions from the literature at this time. Directions for future research are discussed, including consideration of issues related to sources of alpha and beta error and the need for studies examining the incremental validity of combinations of Rorschach and MMPI data in prediction to relevant external criteria. 相似文献
924.
Schnurr, Rosenberg, and Oxman (1992) recently compared the free speech samples and Thematic Apperception Test (TAT) responses of 95 normal adults. They concluded that the two techniques are not interchangeable, and that the TAT, which proved superior in the prediction of individual differences, may be preferable to free speech instructions for eliciting data in content analytic studies. We disagree with both conclusions. Various forms of narrative speech samples may be highly correlated, so long as psychologically meaningful, well-validated, and higher order content categories are used. The use of first-order content categories is less likely to contribute to the study of personality. 相似文献
925.
Eleanor R. Smith Michael A. Becker Donn Byrne David P. J. Przybyla 《Journal of applied social psychology》1993,23(13):1011-1034
Two investigations examine the effect of similarity of sexual attitudes on (a) attraction to a stranger and (b) marital sexual satisfaction. In an experiment using undergraduates, manipulation of subject-stranger similarity in general affective orientation to sexuality affected attraction and other evaluative dependent variables. In the second investigation, married couples revealed sexual attitudes and sexual satisfaction. Husbands and wives were similar (r= 0.58, p < 0.001) in their affective orientations to sexuality. Discrepancy between the partners’ scores predicted sexual dissatisfaction in both partners. In addition, the wife's affective orientation to sexuality predicted more indices of sexual satisfaction and adjustment in both the wife and the husband than did the husband's affective orientation to sexuality. Finally, spouses with a positive affective orientation to sexuality were more accurate when judging their partner's sexual enjoyment, compared to spouses with a negative orientation. The findings have implications for the effects of similarity of attitudes on interpersonal attraction and on relationship quality. 相似文献
926.
C. Ward Siruthers Judith G. Chipperfield Raymond P. Perry 《Journal of applied social psychology》1993,23(19):1619-1637
There is growing evidence to suggest that the ways in which people think about their health problems may have significant implications for psychological and physical well-being. This possibility has the greatest consequences for those groups facing health problems on a daily basis, in particular, the elderly. This study examined the role of perceived health barriers and value for health in later life. A Perceived Health Barriers (absent, present) by Health Value (low, medium, high) 2.3 factorial design was analyzed for younger and older seniors on: number of life-threatening diseases, need for health care, and life satisfaction. In addition, a longitudinal design was used to examine the joint roles of perceived health barriers (PHBs) and health value (HV) on mortality. Findings generally indicated that individuals’ PHBs and HV are associated with health-related outcomes; however, the results differed for young and old elders. Among young elders, those with PHBs and those with high HV had the most negati e profile. That is, they had more diseases, higher health care needs, and lower life satisfaction. Among older elders, the findings were more complicated in that the relationship between PHB and the outcomes depended on HV. Overall, the patterns for old elders suggest that perceived health barriers are most relevant among those with medium value for health and least relevant among those with low value for health. 相似文献
927.
David A. Hofmann 《Journal of applied social psychology》1993,23(22):1827-1846
The present study investigated the relationship between performance goal orientation and performance on a complex task. It was hypothesized that cognitive interference would mediate this relationship. In addition, it was hypothesized that cognitive ability would moderate the relationship between cognitive interference and task performance. A three-variable suppressor relationship indicated that, although the direct effect of performance goal orientation on performance was one that produced better performance, the indirect effect of performance goal orientation indicated that performance orientations were associated with increases in cognitive interference, and these increases in cognitive interference were associated with poorer performance. Thus, the beneficial aspect of performance goal orientation (i. e., the direct effect) was counterbalanced by the dysfunctional aspects of performance goal orientation (i. e., the associated increase in cognitive interference). Support was also found for the proposed moderation of ability on the cognitive interference-task performance relationship for final, but not initial performance. The results are interpreted in light of recent discussions regarding the influence of goal orientation on task performance and cognitive interference. 相似文献
928.
Leora N. Rosen Joel M. Teitelbaum Ltc David J. Westhuis 《Journal of applied social psychology》1993,23(19):1587-1593
The Family Factors Field Study of Operation Desert Shield/Storm (ODS) was designed to collect data on the impact of the Persian Gulf deployment on soldier/family well-being, and the effectiveness of Army and community resources in assisting and supporting families of deployed soldiers. In October 1990, a task force was assembled, and multi-agency research teams visited several Army installations. Informal individual and group interviews were conducted with spouses, unit family support leaders, unit rear detachment personnel, garrison leaders, and local Army program/service providers. The questions were aimed at identifying key stressors which spouses and children experienced in relation to the sudden deployment, as well a stress mediators such as social supports and personal coping skills. Anecdotal information collected during the site visits, combined with findings from previous research on Army families, was used to develop a questionnaire designed to quantify those variables which emerged as relevant to a study of stressors and stress mediators in the context of the ODS deployment. 相似文献
929.
Christopher R. Agnew Vaida D. Thompson Valerie A. Smith Richard H. Gramzow David P. Currey 《Journal of applied social psychology》1993,23(24):2013-2042
A proximal-distal theoretical framework was developed to examine the multivariate roots of homophobia. Using data from a sample of 288 undergraduates who had participated in a computer-assisted panel study over a three-year period, the effects on homophobia of distal and proximal family factors (e. g., parental education and family environment), distal and proximal individual factors (e. g., personality constructs and current beliefs), and proximal individual-situational factors (e. g., acquaintance with homosexuals) were tested in regression analyses. Both analyses employing sets of variables varying in proximity to the homophobic attitude and hierarchical regression employing variables contributing significantly in each set supported the proposed framework. All sets predicted significantly when regressed separately on homophobia; the sets containing the distal factors contributed most weakly, and the sets containing the proximal factors contributed most strongly. In hierarchical regression analysis, this pattern maintained such that the incremental increase in r2 decreased with the addition of each more distal set, with the most distal factors failing to contribute significantly to the prediction. The importance of study findings for attitude change efforts is discussed. 相似文献
930.
Jack W. Finney Kathryn M. Miller Stuart P. Adler 《Journal of applied behavior analysis》1993,26(4):471-472
Child-to-parent transmission of cytomegalovirus may be reduced by increasing protective behaviors (handwashing and glove use) and decreasing risky behaviors (intimate contact between child and parent). This study showed that an educational intervention resulted in increases in reported and objective measures of protective behaviors and decreases in reported risky behaviors. Further study must determine if changes in protective and risky behavior are maintained and prevent cytomegalovirus transmission. 相似文献