全文获取类型
收费全文 | 56019篇 |
免费 | 2338篇 |
国内免费 | 21篇 |
专业分类
58378篇 |
出版年
2020年 | 676篇 |
2019年 | 793篇 |
2018年 | 1138篇 |
2017年 | 1145篇 |
2016年 | 1202篇 |
2015年 | 855篇 |
2014年 | 1041篇 |
2013年 | 4855篇 |
2012年 | 1937篇 |
2011年 | 1936篇 |
2010年 | 1158篇 |
2009年 | 1189篇 |
2008年 | 1672篇 |
2007年 | 1644篇 |
2006年 | 1500篇 |
2005年 | 1238篇 |
2004年 | 1286篇 |
2003年 | 1236篇 |
2002年 | 1172篇 |
2001年 | 1926篇 |
2000年 | 1800篇 |
1999年 | 1347篇 |
1998年 | 621篇 |
1997年 | 534篇 |
1996年 | 612篇 |
1995年 | 555篇 |
1994年 | 544篇 |
1993年 | 527篇 |
1992年 | 1106篇 |
1991年 | 1019篇 |
1990年 | 998篇 |
1989年 | 961篇 |
1988年 | 938篇 |
1987年 | 864篇 |
1986年 | 859篇 |
1985年 | 907篇 |
1984年 | 734篇 |
1983年 | 635篇 |
1979年 | 762篇 |
1978年 | 563篇 |
1975年 | 606篇 |
1974年 | 679篇 |
1973年 | 701篇 |
1972年 | 604篇 |
1971年 | 562篇 |
1970年 | 483篇 |
1969年 | 479篇 |
1968年 | 612篇 |
1967年 | 530篇 |
1966年 | 509篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
HONESTY TESTING FOR PERSONNEL SELECTION: A REVIEW AND CRITIQUE 总被引:1,自引:0,他引:1
Paper and pencil predictors of employee theft are described and studies of validity, reliability, and adverse impact of these tests are examined. Validity studies for 10 tests were grouped into 5 categories: comparisons with polygraph examination results, correlations with admissions of past theft, predictive studies using future job behaviors as criteria, comparisons of shrinkage rates before and after the introduction of a testing program, and comparisons of test scores of groups known to be dishonest with groups representing the general population. While positive correlations were consistently found, a variety of methodological differences between studies were identified which make the direct comparison of test validities suspect. High reliabilities are consistently reported, and test score comparisons by race and sex generally report no differences. Ethical issues in honesty test usage are considered and future research needs are identified. 相似文献
992.
993.
Previous research aimed at quantifying and reducing the decrements encountered in performing manual tasks in cold weather has not described the relationships between task characteristics and cold-induced impairments. The amount of decrement and, often times, the optimal means for reducing the decrement, appear to be task-specific. The research reported here is one in a series of studies formulated to explore those relationships. The strategy is to use tasks from the battery developed by Fleishman (1967) to measure the factorially 'pure' abilities needed to perform all manual tasks. 24 U.S. Marines performed this battery of nine tasks across a range of cold temperatures. To determine if the decrement due to wearing gloves might be less than the decrement due to cold hands as the air temperature decreased, performance on the battery of tasks was measured with and without gloves. Only three of the tasks (abilities) were affected by cold temperatures, and the amount of decrement increased as the air temperature decreased. Three tasks deteriorated due to wearing of gloves, two of those affected by cold and one other. Temperature affected performance independently of the glove effect. Half of the subjects did not complete bare-handed testing at -18 degrees C (approximately 20 min.), indicating this is the lower end of the temperature range in which bare-handed performance for more than a few minutes is practical. 相似文献
994.
M M Delmonte 《Perceptual and motor skills》1984,59(2):581-582
This article reviews three studies giving evidence on the effects of meditation practice on employees' health in the work setting. Although there may be a beneficial role for meditation, unfortunately, these findings await further replication so it would be premature to conclude that meditation practice reduces occupational stress. 相似文献
995.
Tachistoscopic presentation of light flashes was used to test for differences in visual sensitivity among 3 groups of practitioners of Buddhist mindfulness meditation and non-meditator-controls. Meditation practitioners were able to detect light flashes of shorter duration than the non-meditators. There were no differences among the meditator groups. There were no differences among the groups in ability to discriminate between closely spaced successive light flashes. The lower detection threshold for single light flashes for the meditators may reflect an enduring increase in sensitivity, perhaps the long-term effects of the practice of mindfulness meditation on certain perceptual habit patterns. The lack of significant differences in the discrimination of successive light flashes probably reflects the resistance of other perceptual habit patterns to modification. The results support the statements found in Buddhist texts on meditation concerning the changes in perception encountered during the practice of mindfulness. 相似文献
996.
997.
998.
E Müller A Schapowahl A Seel?nder 《Psychiatrie, Neurologie, und medizinische Psychologie》1984,36(8):480-488
The somatic and psychosocial development of 80 subjects with manifest affective-phasic psychoses is studied retrospectively and compared with that of an identically sized control group consisting of neuropsychiatrically healthy subjects. Statistically significant differences were found particularly in the answers to questions dealing with social situation and social adaptability. Achievement at school and vocational qualifications were lower among the parents of the patients than among those of the healthy subjects. Characteristic features of the patients' childhood and adolescence were transient depression, often for no apparent cause, and maladaption, and vocational wishes were fulfilled less often than among the controls. The patients experienced greater difficulty in settling in to a new group due to their contact difficulties. 相似文献
999.
1000.