全文获取类型
收费全文 | 48712篇 |
免费 | 1270篇 |
国内免费 | 20篇 |
出版年
2020年 | 385篇 |
2019年 | 448篇 |
2018年 | 3944篇 |
2017年 | 3296篇 |
2016年 | 2792篇 |
2015年 | 651篇 |
2014年 | 675篇 |
2013年 | 2696篇 |
2012年 | 1599篇 |
2011年 | 3390篇 |
2010年 | 3090篇 |
2009年 | 2122篇 |
2008年 | 2598篇 |
2007年 | 3060篇 |
2006年 | 946篇 |
2005年 | 1068篇 |
2004年 | 955篇 |
2003年 | 874篇 |
2002年 | 839篇 |
2001年 | 958篇 |
2000年 | 929篇 |
1999年 | 690篇 |
1998年 | 388篇 |
1997年 | 388篇 |
1996年 | 362篇 |
1995年 | 306篇 |
1994年 | 287篇 |
1993年 | 272篇 |
1992年 | 505篇 |
1991年 | 501篇 |
1990年 | 499篇 |
1989年 | 428篇 |
1988年 | 377篇 |
1987年 | 403篇 |
1986年 | 386篇 |
1985年 | 422篇 |
1984年 | 400篇 |
1983年 | 346篇 |
1982年 | 285篇 |
1981年 | 270篇 |
1980年 | 251篇 |
1979年 | 331篇 |
1978年 | 297篇 |
1977年 | 256篇 |
1976年 | 236篇 |
1975年 | 290篇 |
1974年 | 335篇 |
1973年 | 315篇 |
1972年 | 240篇 |
1968年 | 241篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
Parental,child-centered attributions and outcome: A meta-analytic review with conceptual and methodological implications 总被引:3,自引:0,他引:3
Eight empirical studies which bear on the relation between parents' child-centered attributions for children's problems and parental satisfaction or child adjustment were meta-analyzed. The parental attributional dimensions of stability and globality garnered the most support as correlates of parental satisfaction and/or children's adjustment; the dimensions of intent, selfish motivation, and blame received initial support and warrant further study. Important methodological and conceptual issues were identified and improvements are suggested. The need for prospective designs aimed at determining the causal relation, if any, between parental attributions and outcome, thorough assessment of attributions and the events which impinge upon them, detailed measurement of symptom and satisfaction variables, a wider array of child diagnoses, and establishment of parental diagnoses, are emphasized. 相似文献
992.
993.
The purpose of the study is to investigate the influence of initial projection of the centre of gravity (CG) on the spatial and temporal organization of the dynamic phenomena accompanying a voluntary movement in humans. From a horizontal quadrupedal stance, ten normal subjects were instructed to raise the right forelimb towards a support target in self paced velocity conditions. Three experimental conditions were tested for which the initial CG projection was either within (C1), at the limits of (C2) or outside the supporting triangle (C3). The results showed that vertical force variations on the four supports always preceded the first vertical displacement of the right wrist (onset of the movement). From C1 to C3, the duration of these anticipatory dynamic phenomena increased enabling an adjustment of the CG position such that equilibrium constraints were fulfilled. For all conditions, the acceleration peak of the CG occurred prior to the onset of movement and from C1 to C3, its magnitude increased in a single direction of the horizontal plane. For each condition, the load transfer was directed to the left forelimb and the right hindlimb (diagonal strategy) and reached a maximal value at the time of lift-off. With respect to this moment, the onset of the movement occurred increasingly early from C1 to C3. These results suggest that contribution of peripheral cues to postural control is more important, when the requirements of horizontal CG displacement increase. 相似文献
994.
We investigated the hypothesis that reaction and anticipation in human perceptual-motor performance are two coordinative modes of a single pattern-forming dynamical system, rather than separate behaviors. Subjects coordinated the onset of finger flexions with visual metronome flashes in each of three patterns: reactive, synchronized, or syncopated. The stimulus frequency was progressively increased (0.125–1.375 Hz) or decreased (1.375-0.125 Hz) in small steps (0.125 Hz) every 10 cycles. We observed qualitative transitions in both the time interval between stimulus and corresponding action (Δt) and their relative phase (ø) at critical values of the stimulus frequency, corresponding to changes from ‘reactive-to-anticipatory’ and ‘anticipatory-to-reactive’ performance. Such transitions provide evidence of a single, multifunctional system, which can be adequately described by the dynamics of collective variables characterizing the respective perception-action patterns. 相似文献
995.
Major sources of stress in Hong Kong teachers were investigated, with specific reference to guidance work as a potential source of stress. A survey of 415 secondary school teachers revealed that guidance-related aspects of work constituted a major dimension of stress, with guidance teachers, female teachers, younger teachers and junior teachers perceiving more stress than their counterparts in this dimension. Workload and time pressure were perceived as the most stressful aspects of work for all teachers. Results also showed an association between stress and job satisfaction, and biographical variables. Implications of the findings for teachers doing guidance work in Hong Kong and internationally are discussed. 相似文献
996.
997.
Mark T. Spence 《Organizational behavior and human decision processes》1996,67(3):271-279
The purpose of this paper is to examine factors that affect the calibration of judgments by systematically comparing experts’ judgments to novices’ when solving a complex, real-world problem that varies in its initial characteristics. Calibration in this context refers to the proportion of times decision makers provide a range about their best estimates that includes the actual outcome. We found that experts specify a narrower range and provide more accurate best estimates than novices. But their tighter ranges are not justified by their greater accuracy: they are less likely to encompass the actual outcome than are novices. However, this effect is attenuated when solving more complex problems. Novices apparently underestimate the complexity of difficult problems, hence the accuracy of their best estimates decreases as does the width of their ranges, resulting in worse calibration. The performance of experts was not significantly different across problem solving conditions. Both groups provided asymmetrical ranges about their best estimates, which suggests they account for the effect of subproblem dependencies. 相似文献
998.
David B. Wiseman Irwin P. Levin 《Organizational behavior and human decision processes》1996,66(3):241-250
In a series of three experiments, subjects made risky decisions under conditions of hypothetical or real consequences. Task variations across experiments included: (1) type of risk (monetary gambles or investments of time and effort), (2) within-subject and between-subjects manipulations of consequence condition, and (3) single or multiple decisions. The hypothesis of no difference between choices in real and hypothetical consequence conditions was retained in each experiment. Supplemental analyses ruled out various “artifactual” interpretations of the null results. Discussion focused on conditions in which researchers can and cannot infer decision makers’ actual risk preferences from their responses in laboratory tasks. 相似文献
999.
Robert T. Carter Adeyinka M. Akinsulure-Smith 《Journal of multicultural counseling and development》1996,24(4):218-228
Although there have been several studies that have explored people's expectations about counseling, to date there has been no such exploration from a racial-cultural perspective. This study sought to explore the relationship between White racial identity attitudes and expectations about counseling. Although the results showed that men and women differ in their expectations about counseling and in their levels of White racial identity attitudes, the findings of the study indicated that there was no significant relationship between White racial identity attitudes and counseling expectations. The results of the study are examined in relation to previous findings in the field and directions for future study are considered. 相似文献
1000.