全文获取类型
收费全文 | 38989篇 |
免费 | 445篇 |
国内免费 | 1篇 |
专业分类
39435篇 |
出版年
2021年 | 132篇 |
2020年 | 250篇 |
2019年 | 302篇 |
2018年 | 3770篇 |
2017年 | 3199篇 |
2016年 | 2645篇 |
2015年 | 544篇 |
2014年 | 517篇 |
2013年 | 2226篇 |
2012年 | 1285篇 |
2011年 | 3054篇 |
2010年 | 2927篇 |
2009年 | 1912篇 |
2008年 | 2339篇 |
2007年 | 2777篇 |
2006年 | 681篇 |
2005年 | 852篇 |
2004年 | 803篇 |
2003年 | 716篇 |
2002年 | 704篇 |
2001年 | 347篇 |
2000年 | 337篇 |
1999年 | 315篇 |
1998年 | 320篇 |
1997年 | 305篇 |
1996年 | 262篇 |
1995年 | 257篇 |
1994年 | 237篇 |
1993年 | 241篇 |
1992年 | 245篇 |
1991年 | 203篇 |
1990年 | 196篇 |
1989年 | 175篇 |
1988年 | 171篇 |
1987年 | 168篇 |
1986年 | 161篇 |
1985年 | 209篇 |
1984年 | 242篇 |
1983年 | 243篇 |
1982年 | 259篇 |
1981年 | 245篇 |
1980年 | 193篇 |
1979年 | 182篇 |
1978年 | 220篇 |
1977年 | 223篇 |
1976年 | 202篇 |
1975年 | 189篇 |
1974年 | 196篇 |
1973年 | 150篇 |
1972年 | 113篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
121.
David M. Fergusson Ph.D. Michael T. Lynskey L. John Horwood 《Journal of abnormal child psychology》1993,21(3):245-269
There have been continuing concerns about the extent to which maternal depression may influence maternal reports of child behavior. To examine this issue, a series of structural equation models of the relationships between maternal depression and errors in maternal reports of child behavior was proposed and tested. These models assumed that (a) maternal depression was unrelated to maternal reporting behavior; (b) maternal depression causally influenced maternal reporting accuracy; (c) maternal depression was correlated with reporting accuracy. These models were fitted to data on maternal depression and multipleinformant (mother, teacher, child) reports of conduct disorder and attention deficit behaviors for a birth cohort of 12 and 13yearold New Zealand children. The results of model fitting suggested the presence of small to moderate correlations (@#@ r=+.13 to+.40) between maternal depression and maternal reporting errors, indicating the presence of a tendency for increasing maternal depression to be associated with a tendency for mothers to overreport child behavior problems. However, independently of any effects of maternal depression on maternal reporting errors there was evidence of small but significant associations (r=.10 to .17; p<.05)between maternal depression and child conduct disorder and attention deficit behaviors.This research was funded by grants from the Health Research Council of New Zealand. 相似文献
122.
Memory & Cognition - The use of different types of partial temporal information is shown to affect dating accuracy and the distribution of errors in event dating. Several different types of... 相似文献
123.
124.
Three cases from a larger review of child abuse inquiry reports are discussed. The abuse the children suffered is termed 'not-existing' because they had been shut away until they perished. Interaction between the children's caretakers and the child protection professionals is examined within a revised framework of the double-bind. 相似文献
125.
Conceptual complexity is a personality characteristic that involves the individual's ability to differentiate and integrate aspects of information. It is usu ally measured with the Paragraph Completion Test (PCT), which requires the completion of six paragraphs, in response to standard stems, often with a time limit of 100-120 sec each. In order to eliminate time pressure, which may reduce complexity, the current study evaluated a revised format that used only two stems but allowed 8 minutes per response. As expected, this procedure resulted in higher scores and produced enough written output to allow analysis of particular test components. Complexity scores from 277 university students were related to total number of words written, sentence length, and number of words with more than three syllables, but not to standard formulae designed to measure readability, such as the Flesch, SMOG and FOG indices. The modest size of the obtained correlations suggests that the scoring of conceptual complexity on the basis of semantic content cannot be replaced by indices based on linguistic and textual components. 相似文献
126.
Kathleen J. Zavela Jeffrey E. Barnett Keith John Smedi Joseph A. Istvan Joseph D. Matarazzo 《Journal of applied social psychology》1990,20(10):835-845
The interrelationships between cigarette, alcohol, and coffee use were examined in 307 U.S. army trainees and 304 U.S. enlisted army personnel. Usage patterns indicated distinct gender differences in this occupational setting. Among women, cigarette use and alcohol consumption were positively correlated; whereas for men, cigarette and coffee use were positively related. For both males and females, alcohol and coffee use were only weakly correlated. As demonstrated in other studies, nonsmokers showed a consistent pattern of abstention from coffee and alcohol or moderate alcohol use. 相似文献
127.
John W. Mason Thomas R. Kosten Steven M. Southwick Earl L. Giller 《Journal of applied social psychology》1990,20(21):1822-1846
An overview is presented of a pilot psychoendocrine study of PTSD inpatients in comparison with several subgroups of schizophrenic and affective disorder patients. Using a hormonal profile including Cortisol, norepinephrine, epinephrine, testosterone, and thyroxine, it was found that the mean values for the PTSD group were at or near the extreme end of the range for every hormone measured, i.e., relatively low for Cortisol and high for the remaining hormones. The possible clinical meaning of these findings is considered in the light of prior psychoendocrine research on chronic stress. The hormonal alterations in PTSD appear to be persistent and suggest the possibility of being linked largely to traits or character structure, perhaps particularly to cognitive variables related to defense and coping mechanisms, as reviewed in detail for each hormonal system. There appears to be a potential for a fruitful union between the traumatic stress and psychoendocrine fields and some future strategies for developing and strengthening such a union are suggested. 相似文献
128.
On the Universality of Human Nature and the Uniqueness of the Individual: The Role of Genetics and Adaptation 总被引:10,自引:0,他引:10
The concept of a universal human nature, based on a species-typical collection of complex psychological adaptations, is defended as valid, despite the existence of substantial genetic variation that makes each human genetically and biochemically unique. These apparently contradictory facts can be reconciled by considering that (a) complex adaptations necessarily require many genes to regulate their development, and (b) sexual recombination makes it improbable that all the necessary genes for a complex adaptation would be together at once in the same individual, if genes coding for complex adaptations varied substantially between individuals. Selection, interacting with sexual recombination, tends to impose relative uniformity at the functional level in complex adaptive designs, suggesting that most heritable psychological differences are not themselves likely to be complex psychological adaptations. Instead, they are mostly evolutionary by-products, such as concomitants of parasite-driven selection for biochemical individuality. An evolutionary approach to psychological variation reconceptualizes traits as either the output of species-typical, adaptively designed development and psychological mechanisms, or as the result of genetic noise creating perturbations in these mechanisms. 相似文献
129.
Four experiments examined two alternative views of retrieval events. The results of Experiment 1 were equivocal because of an apparent “ceiling effect.” The results of Experiments 2, 3, and 4, in which changes were made in basic procedures, seemed to indicate that the act of retrieval itself had an effect on the memorability of words.
相似文献130.
Rodger Beehler 《Studies in Philosophy and Education》1990,10(4):315-335
The essay examines the argument advanced by E.D. Hirsch, Jr., for instituting ‘cultural literacy’ as a fundamental priority of schools. A number of confusions and equivocations in Hirsch's reasoning are identified, and the propensity of his project to indoctrinate is exposed. Among the features of Hirsch's argument shown to be troubling are his shifting construal of ‘language’, his inconsistency about the requirements of cultural literacy, and his uncritical relation to traditional images of the American past and present. The upshot is to raise the question why Hirsch's project has elicited wide support and praise. 相似文献