全文获取类型
收费全文 | 11917篇 |
免费 | 530篇 |
国内免费 | 1篇 |
出版年
2021年 | 94篇 |
2020年 | 189篇 |
2019年 | 239篇 |
2018年 | 291篇 |
2017年 | 337篇 |
2016年 | 360篇 |
2015年 | 272篇 |
2014年 | 332篇 |
2013年 | 1391篇 |
2012年 | 542篇 |
2011年 | 534篇 |
2010年 | 353篇 |
2009年 | 343篇 |
2008年 | 478篇 |
2007年 | 440篇 |
2006年 | 444篇 |
2005年 | 380篇 |
2004年 | 374篇 |
2003年 | 371篇 |
2002年 | 385篇 |
2001年 | 150篇 |
2000年 | 153篇 |
1999年 | 179篇 |
1998年 | 179篇 |
1997年 | 163篇 |
1996年 | 143篇 |
1995年 | 168篇 |
1994年 | 141篇 |
1993年 | 145篇 |
1992年 | 130篇 |
1991年 | 125篇 |
1990年 | 113篇 |
1989年 | 98篇 |
1988年 | 85篇 |
1987年 | 82篇 |
1986年 | 84篇 |
1985年 | 99篇 |
1984年 | 131篇 |
1983年 | 134篇 |
1982年 | 133篇 |
1981年 | 156篇 |
1980年 | 118篇 |
1979年 | 138篇 |
1978年 | 134篇 |
1977年 | 125篇 |
1976年 | 115篇 |
1975年 | 108篇 |
1974年 | 108篇 |
1973年 | 72篇 |
1972年 | 70篇 |
排序方式: 共有10000条查询结果,搜索用时 281 毫秒
141.
David S. Emmerich James L. Gray Charles S. Watson David C. Tanis 《Attention, perception & psychophysics》1972,11(1):65-72
Response latencies were obtained from 10 Ss in auditory signal-detection experiments. The response latencies were inversely related to certainty that a signal was (or was not) presented. The S’s decision criterion was found to have an influence on response latency, which was consistent with the hypothesis that stimuli close to the current criterion elicit longer response latencies than stimuli more distant from the criterion. Comparisons among receiver operating characteristics derived from binary decisions, from the latencies of binary decisions, and from confidence ratings show that response latencies and binary decisions together yield more information about the stimulus than does the binary decision alone. However, the increment in information gained from the measurement of response latencies is in general (though not for every S) smaller than that gained by shifting from yes-no responses to a confidence-rating procedure. 相似文献
142.
One aspect of the comprehension of speech is the assignment of a phonetic representation to the sounds being heard. However, if a person listens to a meaningless syllable that is continually repeated, over time he will hear the syllable undergo a variety of changes. These changes are very systematic in character and represent alterations in the phonetic coding assigned to an unchanging sound stimulus. When the restricted nature of the changes that occur is analyzed phonetically, these changes are found to invlove a reorganization of the phones constituting the syllables and changes in a small number of distinctive features. 相似文献
143.
William Hodos James C. Bonbright Jr. 《Journal of the experimental analysis of behavior》1972,18(3):471-479
Pigeons were trained in a conditional discrimination procedure to discriminate between visual stimuli that varied in intensity. The magnitude of the intensity difference ranged from 0.80 to 0.05 logarithmic units. Psychometric functions were calculated from the data and the mean difference threshold for the 11 subjects was approximately 0.12 logarithmic units. A signal-detection analysis of the data suggested that stimuli that were below the calculated threshold were detectible to the subjects. 相似文献
144.
145.
Steven B. Christopher 《Behavior research methods》1972,4(1):19-20
The validity of a primate dominance hierarchy was examined in terms of its relationship to social interactions. Twelve social behaviors associated with dominance and aggression were recorded during 61 h of observation of six pigtail macaques (Macaca nemestrina). Of the 1,462 interactions recorded, 94.7% were oriented in the water dominance hierarchy in the direction that would be predicted on the basis of their ascribed functions. 相似文献
146.
Modifications of the Hewlett-Packard version of the BASIC language to permit its use in data acquisition and control of on-line experiments are described. The resulting software system is an easy-to-use interpretative compiler. 相似文献
147.
148.
149.
A discriminated Sidman avoidance procedure used by Forgione (1970) was replicated using a head-poke response instead of a leverpress as the avoidance operant. The resultant data were described in terms of the five dependent measures reported by Forgione. Head-poke avoidance was found to be more efficient than its leverpress counterpart and compared very favorably with the lever-disabling (or shock-timer-on) procedure used by Forgione to break up inefficient leverpress behavior patterns. 相似文献
150.