全文获取类型
收费全文 | 56901篇 |
免费 | 2360篇 |
国内免费 | 23篇 |
出版年
2020年 | 574篇 |
2019年 | 622篇 |
2018年 | 935篇 |
2017年 | 896篇 |
2016年 | 987篇 |
2015年 | 707篇 |
2014年 | 864篇 |
2013年 | 3976篇 |
2012年 | 1615篇 |
2011年 | 1639篇 |
2010年 | 983篇 |
2009年 | 1019篇 |
2008年 | 1472篇 |
2007年 | 1457篇 |
2006年 | 1287篇 |
2005年 | 1211篇 |
2004年 | 1145篇 |
2003年 | 1070篇 |
2002年 | 1044篇 |
2001年 | 1873篇 |
2000年 | 1839篇 |
1999年 | 1354篇 |
1998年 | 600篇 |
1997年 | 526篇 |
1992年 | 1221篇 |
1991年 | 1125篇 |
1990年 | 1187篇 |
1989年 | 1042篇 |
1988年 | 1007篇 |
1987年 | 973篇 |
1986年 | 1022篇 |
1985年 | 1133篇 |
1984年 | 871篇 |
1983年 | 779篇 |
1982年 | 561篇 |
1981年 | 519篇 |
1979年 | 950篇 |
1978年 | 644篇 |
1977年 | 584篇 |
1976年 | 578篇 |
1975年 | 830篇 |
1974年 | 949篇 |
1973年 | 997篇 |
1972年 | 848篇 |
1971年 | 771篇 |
1970年 | 733篇 |
1969年 | 738篇 |
1968年 | 971篇 |
1967年 | 872篇 |
1966年 | 827篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
931.
Lonnie R. Snowden 《American journal of community psychology》1987,15(5):575-586
The 20-year history of community psychology is considered with respect to activities on behalf of ethnic minority participation in psychotherapy, increasing cultural diversity, and to a considerably lesser extent, enhancing community systems. A discrepancy was found between community psychology in principle and community psychology in practice. For the future, community psychologists are advised to identify and seek to strengthen (a) indigenous resources for solving personal and community problems; and (b) pathways of help seeking followed by community members. Community psychology is encouraged to reclaim and enact more vigorously its own legacy. To do otherwise, it is argued, forfeits development of potentially significant research and practice and risks continued ambivalence and dissatisfaction despite worthwhile contribution--suffering the peculiar successes of community psychology. 相似文献
932.
Electromagnetic articulography: use of alternating magnetic fields for tracking movements of multiple points inside and outside the vocal tract 总被引:3,自引:0,他引:3
The purpose of this paper is to present a new electromagnetic device which uses alternating magnetic fields for tracking movements of multiple points inside and outside the vocal tract. It is biologically safe, noninvasive, it does not interfere with speech movements, allows for multiple recording in the same subject, and for easy collection of large amounts of data. It is especially suitable for evaluation of patients with speech motor impairments. 相似文献
933.
934.
Experiment 1 of the current research failed to replicate Toppino and Di George’s (1984) finding that older children but not preschoolers showed a spacing effect. Instead, we obtained the spacing effect in all the age groups tested (preschool, kindergarten, first-grade, and third-grade children). The effect was demonstrated with two types of material, words and pictures. Experiment 2 focused on the role that very brief spacings, with no intervening items between repetitions, play in later retention. Age groups and materials were the same as in Experiment 1. Four different levels of spacing were included (0-, 1.1-,2.5-, and 5-sec intervals). The spacing effect was again obtained for all age groups with both words and pictures. The results of both experiments suggest that the spacing effect does not emerge with development. 相似文献
935.
Two studies are reported which examine the availability of scientific propositions of personality in lay conceptions of personality. It is argued from a social constructivist perspective that models of personality must derive from and refer to lay conceptions of persons. Eysenck's trait-type model of introversion-extraversion, containing specific propositions about phenotypic and genotypic differences between extraverts and introverts, was utilized as the scientific model of personality and its availability in lay conceptions of personality was examined in two studies. In the first study, subjects were presented with a genotypic characterization of either an introvert or an extravert target person and asked to infer corresponding phenotypic differences. In the second study, the inference process was reversed with subjects being asked to infer genotypic characteristics of introverts versus extraverts on the basis of phenotypic target person desecrations of the two types. Results from both studies show a high degree of accuracy in subjects' inferences, suggesting that laypersons have well-formed conceptions about personality containing ‘higher-order’ psychogenetic propositions corresponding to Eysenck's trait-type model. The implications of the findings for theory construction are discussed. 相似文献
936.
Separate verbal memory and naming deficits in attention deficit disorder and reading disability 总被引:4,自引:0,他引:4
In this study, verbal memory and naming abilities were investigated in reading disabled (RD) and control children who were characterized according to the presence or absence of attention deficit disorder (ADD). Results indicate that deficits in learning and memory for recently acquired information occur as a function of ADD rather than RD while deficits in naming are specific to RD rather than ADD. We conclude that ADD is a major source of additional and separate cognitive morbidity in RD children. 相似文献
937.
938.
Regional cerebral blood flow (rCBF) may be measured with inhalation techniques that use end-expired values of radioactivity to estimate the isotope concentration in arterial blood. These end-expired data are used as an input function in a mathematical equation to derive rCBF. End-expired air is assumed normally to be in equilibrium with the arterial blood at the alveolar surface of the lung during regular (passive) breathing; this assumption may not be valid during continuous phonation. We therefore have analyzed breathing (inhalation/exhalation) patterns and end-expired radioactivity (133Xe) during (1) speaking, (2) singing, and (3) humming of the national anthem, and also during (4) passive breathing. Statistically significant differences in breathing patterns were measured between a group of nonmusicians and two groups of musicians (singers) during the phonation tasks: The nonmusicians breathed more often (and more rapidly) and exhibited less variability in their breathing patterns than did the musicians. Notwithstanding these differences, the shapes of smoothed functions derived from the end-expired values were not influenced appreciably during phonation (except possibly during talking). The latter finding suggests that estimates of rCBF derived with these data should not be confounded seriously because of the continuous phonation. 相似文献
939.
940.
The interactional teaching strategies of mothers and fathers toward their sociometrically determined popular, moderately popular, or unpopular children, and children's responses to them were examined during a structured puzzle task in a laboratory setting. Parents of popular children used more explanations in aiding their children to complete the puzzle task than parents of moderately popular or unpopular children. Mothers were more likely to offer suggestions, use explanations, and ask questions during the puzzle task than fathers. Analysis of children's responses revealed that popular children were more likely to ignore imperatives by their parents compared with unpopular children, while unpopular children showed a tendency to be more cooperative following imperatives by parents than popular children. Finally, popular children were less likely to ignore but were more likely to go off task following suggestions by parents than either unpopular or moderately popular children. The data are discussed with respect to the possible link between parental socialization patterns and children's popularity in the peer group and the need to consider the interaction patterns in both the peer and parent-child systems for intervention purposes.Portions of this paper were presented by the first author at the Banff International Conference on Behavioral Science, Banff, Alberta, Canada, 1984. The research was supported through the Western Regional Project W144, Development of Social Competencies in Children, with funding from Science and Education Administration/Cooperative Research of the USDA and Utah State University Agricultural Experiment Station. We would like to thank the parents and children for their participation, and Nina Mounts, Maria Norton, Carla Seamons, Soheila Sobhani, and Joan Wareham for their assistance with varying aspects of coding and data analysis. 相似文献