全文获取类型
收费全文 | 11151篇 |
免费 | 526篇 |
国内免费 | 3篇 |
出版年
2020年 | 142篇 |
2019年 | 150篇 |
2018年 | 257篇 |
2017年 | 235篇 |
2016年 | 248篇 |
2015年 | 178篇 |
2014年 | 205篇 |
2013年 | 822篇 |
2012年 | 344篇 |
2011年 | 372篇 |
2010年 | 230篇 |
2009年 | 192篇 |
2008年 | 294篇 |
2007年 | 282篇 |
2006年 | 272篇 |
2005年 | 219篇 |
2004年 | 211篇 |
2003年 | 185篇 |
2002年 | 200篇 |
2001年 | 419篇 |
2000年 | 391篇 |
1999年 | 271篇 |
1998年 | 108篇 |
1996年 | 93篇 |
1995年 | 96篇 |
1993年 | 94篇 |
1992年 | 212篇 |
1991年 | 221篇 |
1990年 | 208篇 |
1989年 | 207篇 |
1988年 | 207篇 |
1987年 | 185篇 |
1986年 | 177篇 |
1985年 | 174篇 |
1984年 | 158篇 |
1983年 | 114篇 |
1982年 | 115篇 |
1979年 | 150篇 |
1978年 | 96篇 |
1977年 | 98篇 |
1975年 | 138篇 |
1974年 | 158篇 |
1973年 | 192篇 |
1972年 | 157篇 |
1971年 | 145篇 |
1970年 | 126篇 |
1969年 | 134篇 |
1968年 | 179篇 |
1967年 | 132篇 |
1966年 | 141篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
162.
163.
E M Weiler B Katbamna N Nileshwar A Dell'Aira 《The Journal of general psychology》1987,114(4):411-421
The present study examined the similarities between four auditory adaptation techniques to determine whether the effects were correlated. The four adaptation techniques compared were: Simultaneous Dichotic Loudness Balance technique (SDLB; Hood, 1950), Magnitude Estimated Binaural technique (MEB; Botté, Canévet, & Scharf, 1982), Magnitude Estimated Monaural technique, (MEM; Weiler, Sandman, & Pederson, 1981), and the Monaural Reaction Time technique (RT; Davis & Weiler, 1976). Results did not show significant correlations between the four techniques, except (r = 0.39) between MEB and MEM procedures. This correlation was much less than the reliability of the measures would allow (r = 0.98 and r = 0.99, respectively). Thus, it appears that the different methods either produced different adaptation effects or measured different aspects of auditory adaptation. The normal ear apparently shows several forms of adaptation, which reduces the perceptual strength of a continuing stimulus, in favor of an intermittent, less redundant one. 相似文献
164.
Dittmar, Warm, and Dember (1985) suggested that visual parallax may lead to declines in perceptual sensitivity over time in spatial vigilance tasks involving comparative judgments. The present study tested this possibility by restraining subjects' head movements during a 1-hr vigil in which comparative (simultaneous task) or absolute (successive task) judgments of line length were necessary for signal detection. Under free-viewing conditions, perceptual sensitivity declined over time with both types of tasks. Head restraint eliminated the sensitivity decrement in both cases. The results highlight signal quality as a crucial determinant of perceptual decrements in sustained attention. 相似文献
165.
166.
167.
168.
D Repperger T Jennings J Jacobson N Michel C Goodyear L Howell 《Perceptual and motor skills》1987,65(2):627-636
Neuromotor reaction times (simple, choice, and decision) were measured when Thyrotropin-releasing hormone (TRH) was administered intravenously to nine healthy men in a double-blind study. Measurements were made of simple reaction time, choice reaction time, and decision time for each subject at various intervals over a 54-hr. period. Given the observed inherent interaction of the drug with the long time used (54 hr.), most analyses were conducted across separate time epochs. Injected subjects showed inhibition in the normal improvement of simple reaction time (which occurs with practice), and they reduced the time required to make a decision. Choice reaction time, however, remained unchanged across the drug-nondrug experimental conditions. 相似文献
169.
The object of the present study was to verify the emergence of a 'visual dominance' effect in memory tests involving different sensory modes (sight and smell), brought about the preattentive mechanisms which select the visual sensory mode regardless of the recall task. 相似文献
170.