全文获取类型
收费全文 | 3325篇 |
免费 | 139篇 |
国内免费 | 1篇 |
出版年
2021年 | 35篇 |
2020年 | 45篇 |
2019年 | 60篇 |
2018年 | 93篇 |
2017年 | 78篇 |
2016年 | 104篇 |
2015年 | 58篇 |
2014年 | 65篇 |
2013年 | 349篇 |
2012年 | 127篇 |
2011年 | 134篇 |
2010年 | 84篇 |
2009年 | 93篇 |
2008年 | 133篇 |
2007年 | 135篇 |
2006年 | 104篇 |
2005年 | 117篇 |
2004年 | 126篇 |
2003年 | 96篇 |
2002年 | 94篇 |
2001年 | 67篇 |
2000年 | 55篇 |
1999年 | 53篇 |
1998年 | 46篇 |
1997年 | 55篇 |
1996年 | 44篇 |
1995年 | 43篇 |
1994年 | 47篇 |
1993年 | 42篇 |
1992年 | 43篇 |
1991年 | 33篇 |
1990年 | 42篇 |
1989年 | 44篇 |
1988年 | 42篇 |
1987年 | 39篇 |
1986年 | 27篇 |
1985年 | 35篇 |
1984年 | 45篇 |
1983年 | 34篇 |
1982年 | 40篇 |
1981年 | 41篇 |
1980年 | 28篇 |
1979年 | 22篇 |
1978年 | 40篇 |
1976年 | 34篇 |
1975年 | 33篇 |
1974年 | 21篇 |
1973年 | 31篇 |
1972年 | 24篇 |
1971年 | 28篇 |
排序方式: 共有3465条查询结果,搜索用时 15 毫秒
941.
Neighborhood Poverty, Social Capital, and the Cognitive Development of African American Preschoolers
In this investigation, we examine the impact of the ecological context of the residential neighborhood on the cognitive development of children by considering social processes not only at the family-level but also at the neighborhood-level. In a socioeconomically diverse sample of 200 African American children living in 39 neighborhoods in Baltimore, we found that neighborhood poverty was associated with poorer problem-solving skills over and above the influence of family economic resources and level of positive parent involvement. Sampson has theorized that neighborhood poverty affects child well-being by altering levels of neighborhood social capital as well as family social capital. Although we found that indicators of neighborhood and family social capital were associated with cognitive skills, these factors did not explain the association between neighborhood poverty and problem-solving ability. Implications for future research in the area of neighborhoods and child development are discussed. 相似文献
942.
Gibb BE Alloy LB Walshaw PD Comer JS Shen GH Villari AG 《Journal of abnormal child psychology》2006,34(3):408-422
A number of studies have supported the hypothesis that negative attributional styles may confer vulnerability to the development of depression. The goal of this study was to explore factors that may contribute to the development of negative attributional styles in children. As hypothesized, elevated levels of depressive symptoms and hopelessness at the initial assessment predicted negative changes in children's attributional styles over the 6-month follow-up period. In addition, elevated levels of verbal victimization occurring between the 2 assessments, as well as that occurring in the 6 months preceding the initial assessment, prospectively predicted negative changes in children's attributional styles over the follow-up. Further, initial depressive symptoms and verbal victimization during the follow-up continued to significantly predict attributional style change even when the overlap among the predictors was statistically controlled. Contrary to the hypotheses, however, neither parent-reported levels of overall negative life events nor parents' attributions for their children's events predicted changes in children's attributional styles. 相似文献
943.
Drawing in aphasia therapy has been used predominately as a substitution for speech or to augment communication when other modalities are non-functional. The value of drawing as a route for facilitating verbal expression has not been a focus of prior research. We compared the usefulness of drawing and writing as compensatory strategies for improving naming in individuals with aphasia. Activation patterns of writing and drawing in healthy adults were examined using fMRI. Clinical results suggest that drawing facilitated naming whereas writing diminished accurate naming responses, and that drawing quality is not relevant to this facilitatory effect. Functional MRI findings revealed strong bi-hemispheric activation of semantic and phonological networks while drawing that may support our clinical findings. 相似文献
944.
Davis CJ Bowers JS 《Journal of experimental psychology. Human perception and performance》2006,32(3):535-557
Five theories of how letter position is coded are contrasted: position-specific slot-coding, Wickelcoding, open-bigram coding (discrete and continuous), and spatial coding. These theories make different predictions regarding the relative similarity of three different types of pairs of letter strings: substitution neighbors, neighbors-once-removed, and double-substitution neighbors. In Experiment 1, we used an illusory word paradigm and found that neighbor-once-removed similarity contexts resulted in fewer illusory word reports than substitution neighbors but more illusory words than double-substitution neighbors. In Experiments 2 and 3, we used a masked form priming technique with a lexical-decision task. The pattern of facilitation was as predicted by spatial coding but was incompatible with slot-coding, Wickelcoding, and both versions of open-bigram coding. These results provide further support for the SOLAR (self-organizing lexical aquisition and recognition) model of visual word identification. 相似文献
945.
946.
947.
Mendoza-Denton R Downey G Purdie VJ Davis A Pietrzak J 《Journal of personality and social psychology》2002,83(4):896-918
The authors proposed a process model whereby experiences of rejection based on membership in a devalued group can lead people to anxiously expect, readily perceive, and intensely react to status-based rejection. To test the model, the authors focused on race-based rejection sensitivity (RS-race) among African Americans. Following the development and validation of the RS-Race Questionnaire (Studies 1 and 2), the authors tested the utility of the model for understanding African American students' experiences at a predominantly White university (Study 3). Students high in RS-race experienced greater discomfort during the college transition, less trust in the university, and relative declines in grades over a 2- to 3-year period. Positive race-related experiences, however, increased feelings of belonging at the institution among students high in RS-race. 相似文献
948.
Chandler Davis 《Journal of Philosophical Logic》2002,31(6):613-614
Volume Contents
Contents Volume 31 2002 相似文献949.
The purpose was to assess differences in mean scores of 23 men and 28 women who rated immediate stress low and 11 men and 34 women who rated immediate stress high. Analysis of variance of mean differences was significant for sex but not for immediate stress or their interaction on the Coping Resources Inventory, Emotional Domain. 相似文献
950.
In 2 experiments, young and older adults heard target speech presented in quiet or with a competing speaker in the background. The distractor consisted either of meaningful speech or nonmeaningful speech composed of randomly ordered word strings (Experiment 1) or speech in an unfamiliar language (Experiment 2). Tests of recall for the target speech showed that older adults, but not younger adults, were impaired more by meaningful distractors than by nonmeaningful distracters. However, on a surprise recognition test, young adults were more likely than older adults to recognize meaningful distractor items. These results suggest that reduced efficiency in attentional control is an important factor in older adults' difficulty in recalling target speech in the presence of a background of competing speech. 相似文献