全文获取类型
收费全文 | 21309篇 |
免费 | 65篇 |
国内免费 | 1篇 |
专业分类
21375篇 |
出版年
2023年 | 10篇 |
2021年 | 12篇 |
2020年 | 21篇 |
2019年 | 21篇 |
2018年 | 3507篇 |
2017年 | 2837篇 |
2016年 | 2278篇 |
2015年 | 203篇 |
2014年 | 100篇 |
2013年 | 196篇 |
2012年 | 590篇 |
2011年 | 2414篇 |
2010年 | 2533篇 |
2009年 | 1498篇 |
2008年 | 1737篇 |
2007年 | 2189篇 |
2006年 | 83篇 |
2005年 | 239篇 |
2004年 | 191篇 |
2003年 | 144篇 |
2002年 | 85篇 |
2001年 | 47篇 |
2000年 | 69篇 |
1999年 | 37篇 |
1998年 | 28篇 |
1997年 | 23篇 |
1996年 | 19篇 |
1995年 | 11篇 |
1994年 | 20篇 |
1993年 | 8篇 |
1992年 | 14篇 |
1991年 | 15篇 |
1990年 | 17篇 |
1989年 | 14篇 |
1988年 | 13篇 |
1987年 | 11篇 |
1986年 | 8篇 |
1985年 | 8篇 |
1984年 | 10篇 |
1983年 | 6篇 |
1982年 | 7篇 |
1981年 | 8篇 |
1979年 | 10篇 |
1978年 | 8篇 |
1976年 | 6篇 |
1974年 | 6篇 |
1973年 | 10篇 |
1972年 | 6篇 |
1971年 | 6篇 |
1966年 | 6篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
A large national sample of high school seniors rated their preferences for the allocation of work and family duties within their own prospective marriages. The results indicate that many seniors favor half-time or full-time work for wives without children. On the other hand, the majority prefer that the mother of preschool children stay home, although half-time work is acceptable to many. Respondents who are male or White or did not have a working mother themselves are somewhat more conservative on these issues. Virtually all seniors view less than full-time employment by the husband as unacceptable. With regard to child care and housework, most seniors prefer equal sharing between the spouses. A comparison of four senior classes reveals a slight trend from 1976 to 1979 toward increased sharing of duties. 相似文献
42.
Three types of oculomotor programming disturbances are described in patients with the dementia syndrome. This report describes two of these abnormalities, poorly regulated gaze patterns and a programming type of gaze perseveration. All patients showed poorly regulated gaze patterns in contrast to the normal controls, whereas on the whole only the moderately affected patients showed the programming type of gaze perseveration. The third type of oculomotor programming disturbance is efferent perseveration of gaze (a hypokinetic, "staring" type of gaze pattern) and can be seen with severe dementia. The possible significance of these findings is discussed. 相似文献
43.
W A Johnston S P Heinz 《Journal of experimental psychology. Human perception and performance》1979,5(1):168-175
Two studies examined the effect of the sensory discriminability of targets from nontargets on depth of nontarget processing. Subjects shadowed target words that were binaurally presented with coincident nontarget words. Targets and nontargets were spoken in the same male voice under low sensory discriminability and in male and female voices, respectively under high sensory discriminability. Across the two studies, depth of nontarget processing was assessed in three ways: extent to which shadowing accuracy was disrupted by a semantic overlap between targets and nontargets, expenditure of capacity (reaction time to subsidiary light signals), and nontarget recall. All three possible measures of depth of nontarget processing decreased as sensory discriminability increased. The data support the assumption of multiple-loci theories of attention that nontargets can be perceptually inhibited; they contraindicate the assumption of late-selection theories that perceptual processing is automatic and irrepressible. 相似文献
44.
An inexpensive head-mounted scene holder is described. In contrast to the usual biteboard/fixed-head approach, the present apparatus allows head movements without introducing substantial artifact. This enables eye movement investigations of brain-damaged or psychiatric subjects who often cannot maintain prolonged head immobility; also, the unit makes possible subjects’ verbal reports coincident with visual scanning. 相似文献
45.
In two experiments subjects performed a choice-reaction-time (CRT) task and a second task concurrently. The second task was a simple reaction-time task in Experiment 1 and sentence generation and recall tasks in Experiment 2. Both studies yielded two main findings: Performance of the second task was not affected by CRT memory load (one, two, or four items), and the requirement to perform the second task did not affect the rate of increase of CRT with memory load. The first finding indicates that the effect of memory load on CRT is attributable to memory scanning, or Stage 2 processing, and is not an artifact of the rehearsal demands of the CRT memory set. The second finding indicates that Stage 2 processing is not sensitive to division of attention between the CRT and a second task. 相似文献
46.
47.
48.
49.
50.