全文获取类型
收费全文 | 64210篇 |
免费 | 1865篇 |
国内免费 | 22篇 |
专业分类
66097篇 |
出版年
2020年 | 508篇 |
2019年 | 669篇 |
2018年 | 4129篇 |
2017年 | 3495篇 |
2016年 | 3024篇 |
2015年 | 842篇 |
2014年 | 919篇 |
2013年 | 3831篇 |
2012年 | 2027篇 |
2011年 | 3833篇 |
2010年 | 3312篇 |
2009年 | 2389篇 |
2008年 | 3008篇 |
2007年 | 3402篇 |
2006年 | 1364篇 |
2005年 | 1420篇 |
2004年 | 1322篇 |
2003年 | 1207篇 |
2002年 | 1187篇 |
2001年 | 1269篇 |
2000年 | 1179篇 |
1999年 | 925篇 |
1998年 | 583篇 |
1997年 | 523篇 |
1996年 | 488篇 |
1995年 | 446篇 |
1994年 | 429篇 |
1992年 | 674篇 |
1991年 | 684篇 |
1990年 | 657篇 |
1989年 | 648篇 |
1988年 | 613篇 |
1987年 | 607篇 |
1986年 | 627篇 |
1985年 | 713篇 |
1984年 | 590篇 |
1983年 | 556篇 |
1982年 | 476篇 |
1981年 | 471篇 |
1979年 | 619篇 |
1978年 | 484篇 |
1976年 | 457篇 |
1975年 | 524篇 |
1974年 | 586篇 |
1973年 | 586篇 |
1972年 | 457篇 |
1969年 | 445篇 |
1968年 | 516篇 |
1967年 | 450篇 |
1966年 | 448篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
David S. Geldmacher 《Brain and cognition》1996,32(3):405-415
Cancellation tests are commonly used in the clinical assessment of visuospatial function, but there has been little study of task characteristics influencing performance. This study was designed to assess factors which affect cancellation performance. Sixteen healthy subjects sequentially performed four random-array letter cancellation tasks. The forms contained 50 and 100 stimuli and target:distractor (T/D) ratios of 1:4 and 1:9 with target letter “A” and randomly selected letter distractors. The primary performance measure was calculated as the number of correctly cancelled targets divided by the time to complete the task, corrected for accuracy. This measure revealed a strong effect of T/D ratio (p< .0001), with performance adversely affected by higher proportion of distractors. There was no effect of stimulus number. This suggests that T/D ratio should be considered in cancellation test design and interpretation. 相似文献
52.
53.
54.
55.
56.
57.
58.
Judith Volmer Cornelia Niessen Daniel Spurk Alexandra Linz Andrea E. Abele 《Psychologie appliquee》2011,60(4):522-545
While previous research has mainly emphasised the importance of leader–member exchange (LMX) to job satisfaction, there is a lack of research on reciprocal relationships between job satisfaction and LMX. In this study, we not only suggest that good LMX increases job satisfaction, but that job satisfaction can also enhance high‐quality supervisor–employee relationships. A full cross‐lagged panel analysis was used to test reciprocal relationships between LMX and job satisfaction. Employees (N= 279) of a large information technology company filled out questionnaires at two times, with a time lag of 3 months. In line with our predictions, findings revealed a positive relationship between LMX and job satisfaction both at Time 1 and Time 2. Moreover, LMX at Time 1 predicted the increase of job satisfaction at Time 2, and job satisfaction at Time 1 predicted the increase of LMX at Time 2. The results demonstrate the need to consider reciprocal relationships between job satisfaction and LMX when explaining employees' workplace outcomes. Our findings are discussed in terms of positive psychology theory. 相似文献
59.
60.