全文获取类型
收费全文 | 2743篇 |
免费 | 88篇 |
国内免费 | 4篇 |
出版年
2020年 | 35篇 |
2019年 | 58篇 |
2018年 | 47篇 |
2017年 | 73篇 |
2016年 | 68篇 |
2015年 | 44篇 |
2014年 | 74篇 |
2013年 | 321篇 |
2012年 | 87篇 |
2011年 | 106篇 |
2010年 | 78篇 |
2009年 | 70篇 |
2008年 | 87篇 |
2007年 | 95篇 |
2006年 | 76篇 |
2005年 | 83篇 |
2004年 | 71篇 |
2003年 | 62篇 |
2002年 | 85篇 |
2001年 | 53篇 |
2000年 | 62篇 |
1999年 | 51篇 |
1998年 | 25篇 |
1997年 | 31篇 |
1996年 | 28篇 |
1995年 | 42篇 |
1994年 | 23篇 |
1993年 | 34篇 |
1992年 | 32篇 |
1991年 | 33篇 |
1990年 | 25篇 |
1989年 | 27篇 |
1988年 | 34篇 |
1987年 | 33篇 |
1986年 | 31篇 |
1985年 | 39篇 |
1984年 | 36篇 |
1983年 | 25篇 |
1982年 | 22篇 |
1981年 | 28篇 |
1980年 | 28篇 |
1979年 | 38篇 |
1978年 | 28篇 |
1977年 | 32篇 |
1976年 | 34篇 |
1975年 | 35篇 |
1974年 | 43篇 |
1973年 | 37篇 |
1971年 | 23篇 |
1967年 | 25篇 |
排序方式: 共有2835条查询结果,搜索用时 15 毫秒
41.
42.
43.
Gordon G. Bechtel 《Psychometrika》1966,31(4):491-504
Certain aspects of point estimation are treated for two kinds of exponential latency processes. The first unitary process is represented by a simple exponential density in which the rate parameter may be viewed as an unknown constant or as a random variable. If a second, slower exponential process is grafted onto the first, there results a postulated two-component latency between stimulus and response. Moments estimators are derived for the two parameters of this latter density, and the relevance of the second parameter to decision time is emphasized.This research was supported in part by National Institutes of Health Grant MH-04439-05. The author would like to express his appreciation to James Baker of Oregon Research Institute for certain helpful comments concerning aspects of this work. 相似文献
44.
45.
Crying is said to result from stimulus need. An experiment was done in which infants were stimulated during quiet periods to see if this would postpone the onset of crying. The results were positive. An alternative explanation in terms of internal temperature control is considered. 相似文献
46.
47.
Groups of non-computer scientists were tested to evaluate the potential of an as yet non-existent interactive terminal with
a screen diagonal of one meter. A simulated large image terminal provided limited realistic interactions using software developed
to give close proximity to the predicted visual effect. Subjective responses from 101 subjects were elicited from a questionnaire
designed to evaluate specific aspects of the “terminal” in use. From this data, two types of screen (lenticular and plain)
and two types of interaction devices (touch and remote pointer) were analyzed experimentally using a two-way factorial design.
Potential end-users provided positive feedback concerning future use of the Large Image Terminal. Building a realistic mock-up
revealed screen contaminations which would not have been discovered until a much later stage. Although statistical analysis
of screen evaluations was equivocal, the questionnaire was sufficiently penetrating to separate the positive and negative
features. This methodology was invaluable in guiding the design process.
Copies of the questionnaire may be obtained from the authors at the Heriot-Watt address. 相似文献
48.
49.
A survey of Human Resource practitioners' perceptions of pre-employment screening procedures was conducted. The results indicated differences between tests in terms of perceived accuracy and offensiveness, as well as other attributes. Regression analyses suggested that beliefs about validity, the number of other companies using these procedures, perceived offensiveness of the test, and ease in passing the test were important factors in the willingness to use a particular test. Conversely, perceptions regarding the discriminatory impact of the test and the cost of using the test generally were not related to willingness to use the test. Limitations of this study, which was primarily exploratory, are noted. 相似文献
50.
Donna Y. Ford J. John Harris James M. Schuerger 《Journal of counseling and development : JCD》1993,71(4):409-417
A review of the literature suggests that a paucity of information exists regarding how culture-specific issues such as being both Black and gifted influence the psychological needs and personality development of gifted Black students. Stellar attempts, however, are currently underway to develop theories and perspectives of racial identity development among Black students. These theories and perspectives are discussed in an attempt to understand and address the psychological and social needs of gifted Black students. 相似文献