全文获取类型
收费全文 | 44394篇 |
免费 | 896篇 |
国内免费 | 13篇 |
出版年
2020年 | 277篇 |
2019年 | 262篇 |
2018年 | 3753篇 |
2017年 | 3134篇 |
2016年 | 2617篇 |
2015年 | 503篇 |
2014年 | 457篇 |
2013年 | 2003篇 |
2012年 | 1307篇 |
2011年 | 3064篇 |
2010年 | 2910篇 |
2009年 | 1874篇 |
2008年 | 2282篇 |
2007年 | 2749篇 |
2006年 | 592篇 |
2005年 | 735篇 |
2004年 | 663篇 |
2003年 | 553篇 |
2002年 | 568篇 |
2001年 | 795篇 |
2000年 | 845篇 |
1999年 | 596篇 |
1998年 | 289篇 |
1997年 | 249篇 |
1996年 | 222篇 |
1992年 | 461篇 |
1991年 | 419篇 |
1990年 | 478篇 |
1989年 | 436篇 |
1988年 | 411篇 |
1987年 | 418篇 |
1986年 | 423篇 |
1985年 | 436篇 |
1984年 | 351篇 |
1983年 | 312篇 |
1982年 | 241篇 |
1979年 | 409篇 |
1978年 | 287篇 |
1977年 | 260篇 |
1976年 | 234篇 |
1975年 | 357篇 |
1974年 | 394篇 |
1973年 | 363篇 |
1972年 | 339篇 |
1971年 | 298篇 |
1970年 | 278篇 |
1969年 | 329篇 |
1968年 | 372篇 |
1967年 | 331篇 |
1966年 | 336篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
23.
24.
25.
A time-sharing paradigm was used to study potential interference effects of concurrent successive-auditory/vocal, successive-visual/motor, simultaneous-auditory/vocal, and simultaneous-visual/motor tasks on right- and left-handed manual-motor behaviors of differential levels of difficulty. Participants were selected from each of three developmental levels from 9 through 20 years of age. Results suggested that processing style (i.e., successive or simultaneous) interacts with modality (i.e., auditory/vocal or visual/motor) in terms of lateralized interference effects; however, potential effects due to age level were obfuscated by differential concurrent-task difficulties. 相似文献
26.
This paper examines college students' attributions about suicide as a function of gender and context (athletic vs. relationship failure). Results indicated that male athletes who suicided were considered more emotionally well-adjusted compared to males who suicided because of a relationship failure and all females. Male and female athletes who suicided were seen as more competent and less distressed compared to those who suffered a failed relationship. Females were also seen as more distressed compared to males. These results are discussed in terms of a positive bias toward athletes in our society as well as gender stereotypes. Implications of these findings as well as methodological limitations are discussed. 相似文献
27.
28.
29.
G. C. Preston 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1985,37(1):23-31
Rats' lever presses on a retractable lever earned brief presentations of discriminative stimuli signalling periods in which responding on an alternative lever was either non-reinforced (extinction) or reinforced on a random ratio schedule. The predictions of two theoretical accounts of this behaviour were tested by studying the effects of omitting either the stimulus signalling the reinforced or that signalling the non-reinforced schedule component. Under these conditions rats' behaviour is determined by the conditioned, affective properties of the stimuli rather than by their purely informational properties. 相似文献
30.