全文获取类型
收费全文 | 9482篇 |
免费 | 111篇 |
国内免费 | 18篇 |
专业分类
教育 | 6426篇 |
科学研究 | 1046篇 |
各国文化 | 93篇 |
体育 | 1015篇 |
综合类 | 6篇 |
文化理论 | 98篇 |
信息传播 | 927篇 |
出版年
2021年 | 72篇 |
2020年 | 124篇 |
2019年 | 184篇 |
2018年 | 241篇 |
2017年 | 260篇 |
2016年 | 225篇 |
2015年 | 161篇 |
2014年 | 228篇 |
2013年 | 1733篇 |
2012年 | 206篇 |
2011年 | 199篇 |
2010年 | 175篇 |
2009年 | 157篇 |
2008年 | 173篇 |
2007年 | 201篇 |
2006年 | 164篇 |
2005年 | 159篇 |
2004年 | 159篇 |
2003年 | 177篇 |
2002年 | 141篇 |
2001年 | 161篇 |
2000年 | 159篇 |
1999年 | 159篇 |
1998年 | 76篇 |
1997年 | 76篇 |
1996年 | 109篇 |
1995年 | 77篇 |
1994年 | 95篇 |
1993年 | 89篇 |
1992年 | 154篇 |
1991年 | 147篇 |
1990年 | 139篇 |
1989年 | 137篇 |
1988年 | 115篇 |
1987年 | 119篇 |
1986年 | 138篇 |
1985年 | 134篇 |
1984年 | 107篇 |
1983年 | 129篇 |
1982年 | 110篇 |
1981年 | 105篇 |
1980年 | 93篇 |
1979年 | 165篇 |
1978年 | 111篇 |
1977年 | 109篇 |
1976年 | 104篇 |
1975年 | 80篇 |
1974年 | 89篇 |
1972年 | 70篇 |
1971年 | 70篇 |
排序方式: 共有9611条查询结果,搜索用时 31 毫秒
981.
Two aspects concerning the production of shapes in handwriting are distinguished in the present paper. The first aspect is indicated by thespatial variability of letters measured across replications. Spatial variability is assumed to reflect the basic spatial noise observed in everyday writing. The second aspect deals with the geometric characteristics of letter shapes, measured by the ratio of the vertical over the horizontal letter size (Y/X-ratio). The main question is whether the geometric characteristics and basic spatial noise originate from a common source. More specifically, we are interested in whether Y/X-ratio as well as spatial variability will alter across changed circumstances, or whether Y/X-ratio will alter without a change in spatial variability. Subjects wrote the simple letter sequencelelele in conditions with and without vision under three scaling conditions requirements (small, normal and large letter sizes). The main results were that geometric aspects of letters altered (Y/X-ratio) under no vision and under the scaling requirement to write in a small format. In contrast, shapes were produced with unchanged spatial variability in all conditions of vision and scaling requirements. The results suggest that alterations of geometric aspects of letters across changed circumstances do not necessarily involve an increase in spatial variability. 相似文献
982.
OBJECTIVES: To investigate differences and similarities between violent offenders and two types of sex offenders, rapists and child molesters, in terms of their personality, the nature of the victim, the role of alcohol, and their confession to their crime. METHOD: Thirty-six adult sex offenders, 23 child molesters, and 32 violent offenders were compared on personality measures, their relationship with the victim, the presence of alcohol intoxication, their confession rate and retraction at trial, and the reasons they gave for having confessed to the police. RESULTS: Child molesters and adult sex offenders (rapists) were significantly more introverted than the violent offenders. The child molesters had higher social desirability scores than the other groups, they tended to assault relatives and friends, they were rarely intoxicated while committing the offense, and they had strong internal need to confess to the police. Rapists and violent offenders were more commonly intoxicated during the commission of the offense; the former tended to assault acquaintances, where violent offenders most commonly assaulted strangers. Exactly half of the rapists retracted their confession when the case went to trial; in contrast none of the other offenders retracted their confession. CONCLUSIONS: The results show that there are significant differences as well as similarities between the three groups of offenders, which have implications for assessment and treatment. 相似文献
983.
This article integrates the findings in the special issue with a comprehensive review of the evidence for seven central questions about the role of naming-speed deficits in developmental reading disabilities. Cross-sectional, longitudinal, and cross-linguistic research on naming-speed processes, timing processes, and reading is presented. An evolving model of visual naming illustrates areas of difference and areas of overlap between naming speed and phonology in their underlying requirements. Work in the cognitive neurosciences is used to explore two nonexclusive hypotheses about the putative links between naming speed and reading processes and about the sources of disruption that may cause subtypes of reading disabilities predicted by the double-deficit hypothesis. Finally, the implications of the work in this special issue for diagnosis and intervention are elaborated. 相似文献
984.
985.
Data from a postdictive study of the tests of the Graduate Record Examination and the eight semesters of undergraduate grade averages, each semester's average being computed independently of the rest, are presented. Postdictive validities of the aptitude portions of the GRE are essentially similar to predictive validities obtained earlier by the senior author. Both predictive and postdictive validity gradients over the eight semesters are relatively steep, with freshman grades having the highest correlations with the tests. The validity gradient for all advanced tests combined does not follow the pattern for the aptitude tests, but neither does it show the opposite gradient. Advanced test results are most highly correlated with sophomore grades, but the validity gradient over the eight semesters is relatively flat. A small scale extension of this research into post baccalaureate training indicated that senior grades were most predictive of graduate criteria, but a larger scale study is clearly called for. Possible implications for ability theory and for selection of graduate students are discussed. 相似文献
986.
987.
DAVID G. ZIMPFER JANE A. COX JOHN D. WEST DONALD L. BUBENZER DAVID K. BROOKS 《Counselor Education & Supervision》1997,36(4):318-331
Doctoral counselor education programs nationwide were surveyed to determine their relative emphases on the professional roles of instruction, supervision, scholarship, clinical practice, and leadership, and how they carried it out. 相似文献
988.
Higher education worldwide is beset by rigid budgetary constraints. Increases in governmental and student support have been insufficient to offset the severe inflationary spiral of recent years, and many institutions have been confronted by yearly gaps between estimated revenues and projected expenditures. Following 6 years of across-the-board internal budget reallocations amounting to $11.1 million, Penn State initiated a rolling 5-year planning and budget process in 1977. The new process, resulting in an additional $16.6 million in internal reductions and reallocations through 1982–83, was designed to provide for more selective budgetary decisions based on careful analysis of university priorities. As the process has evolved, it has reoriented budget decisions toward university planning issues and qualitative concerns. 相似文献
989.
990.
Marina L. Puglisi Charles Hulme Lorna G. Hamilton Margaret J. Snowling 《Scientific Studies of Reading》2017,21(6):498-514
The home literacy environment is a well-established predictor of children’s language and literacy development. We investigated whether formal, informal, and indirect measures of the home literacy environment predict children’s reading and language skills once maternal language abilities are taken into account. Data come from a longitudinal study of children at high risk of dyslexia (N = 251) followed from preschool years. Latent factors describing maternal language were significant predictors of storybook exposure but not of direct literacy instruction. Maternal language and phonological skills respectively predicted children’s language and reading/spelling skills. However, after accounting for variations in maternal language, storybook exposure was not a significant predictor of children’s outcomes. In contrast, direct literacy instruction remained a predictor of children’s reading/spelling skills. We argue that the relationship between early informal home literacy activities and children’s language and reading skills is largely accounted for by maternal skills and may reflect genetic influences. 相似文献