全文获取类型
收费全文 | 1312篇 |
免费 | 73篇 |
国内免费 | 1篇 |
专业分类
1386篇 |
出版年
2023年 | 7篇 |
2021年 | 21篇 |
2020年 | 31篇 |
2019年 | 32篇 |
2018年 | 34篇 |
2017年 | 28篇 |
2016年 | 37篇 |
2015年 | 32篇 |
2014年 | 23篇 |
2013年 | 166篇 |
2012年 | 58篇 |
2011年 | 62篇 |
2010年 | 44篇 |
2009年 | 42篇 |
2008年 | 54篇 |
2007年 | 47篇 |
2006年 | 48篇 |
2005年 | 42篇 |
2004年 | 52篇 |
2003年 | 44篇 |
2002年 | 43篇 |
2001年 | 31篇 |
2000年 | 21篇 |
1999年 | 25篇 |
1998年 | 27篇 |
1997年 | 22篇 |
1996年 | 27篇 |
1995年 | 13篇 |
1994年 | 12篇 |
1993年 | 18篇 |
1992年 | 21篇 |
1991年 | 6篇 |
1990年 | 13篇 |
1989年 | 11篇 |
1988年 | 10篇 |
1987年 | 10篇 |
1986年 | 8篇 |
1985年 | 13篇 |
1984年 | 16篇 |
1983年 | 12篇 |
1982年 | 12篇 |
1981年 | 14篇 |
1980年 | 10篇 |
1979年 | 11篇 |
1978年 | 7篇 |
1977年 | 7篇 |
1976年 | 10篇 |
1974年 | 8篇 |
1973年 | 8篇 |
1971年 | 6篇 |
排序方式: 共有1386条查询结果,搜索用时 0 毫秒
171.
Two modes of generating vibrotactile patterns, static and scanned, were examined. In the static mode, all elements making up the pattern were turned on and off simultaneously. In the scanned mode, the pattern to be identified was moved across the tactile array. The patterns were letters of the alphabet presented to the fingertips by means of the Optacon, a reading aid for the blind. The results of the first experiment showed that the performance on a letter recognition task decreased as pattern duration decreased and that at all durations below 200-msec performance in the static mode was better than in the scanned mode. Good letter recognition was possible at durations of 4 msec in the static mode. The results of the second experiment showed that letter recognition in the static mode was highly dependent on the perceived intensity of the letters presented, whereas intensity changes in the scanned mode had little effect on letter recognition. The results of the third experiment showed that both modes of pattern presentation produced similar results in the presence of masking stimuli. The implications of the results for cutaneous pattern perception and information transmission and visual letter recognition are discussed. 相似文献
172.
Three experiments were conducted to determine the influence of warming-up activities on performance and on learning in two discrete motor tasks. During initial trials on the criterion task, Ss were given various types of warming-up activities having an activity-set that was either the same as or different from the criterion task. Test trials followed in which all groups practiced the criterion task only. No significant differences in performance on the criterion task were found regardless of the appropriateness of the warming-up activity during initial trials. The results suggested that warming-up properties are not a factor in original learning of discrete motor skills. 相似文献
173.
With .2-sec bursts of white noise as both conditioned stimulus (CS) and unconditioned stimulus (UCS), conditioning of first-interval skin conductance responses was obtained when the intensity of the CS equaled and exceeded that of the UCS. There was no evidence that second-interval response conditioning occurred. Nonspecific response frequencies were also affected by the variations in stimulus intensity, this raising some question about typical controls employed in SCR conditioning. There was some evidence that second interval responses were suppressed by the intense CS values. It was concluded that the existence of simple conditioning with a CS/UCS intensity ratio equal to or greater than unity was contrary to the Pavlovian proposition that a CS must be biologically less salient than the UCS in order for conditioning to occur. It was noted, however, that the suppression of second-interval responses might indicate that anticipatory CRs which are not confounded with orienting reflexes are prevented from exhibiting a conditioning effect when a high CS/UCS intensity ratio is employed. 相似文献
174.
175.
Amnesic effects in short-term memory 总被引:1,自引:0,他引:1
176.
The brightness of pairs of photic pulses, differing in pulse duration and pulse separation. was measured. The data were in general agreement with the neurophysiological model of Bishop and Clare. Pulse duration appeared to have little systematic influence on the shape of the curves. Time between onset of the first and second pulse appeared to be a prime factor determining the receptivity of the cortex to the second pulse. The two pulses were seen as single below about .03 sec separation. The second pulse was always judged brighter than the first. 相似文献
177.
Behavioral momentum theory fails to account for the effects of reinforcement rate on resurgence 下载免费PDF全文
Andrew R. Craig Timothy A. Shahan 《Journal of the experimental analysis of behavior》2016,105(3):375-392
The behavioral‐momentum model of resurgence predicts reinforcer rates within a resurgence preparation should have three effects on target behavior. First, higher reinforcer rates in baseline (Phase 1) produce more persistent target behavior during extinction plus alternative reinforcement. Second, higher rate alternative reinforcement during Phase 2 generates greater disruption of target responding during extinction. Finally, higher rates of either reinforcement source should produce greater responding when alternative reinforcement is suspended in Phase 3. Recent empirical reports have produced mixed results in terms of these predictions. Thus, the present experiment further examined reinforcer‐rate effects on persistence and resurgence. Rats pressed target levers for high‐rate or low‐rate variable‐interval food during Phase 1. In Phase 2, target‐lever pressing was extinguished, an alternative nose‐poke became available, and nose‐poking produced either high‐rate variable‐interval, low‐rate variable‐interval, or no (an extinction control) alternative reinforcement. Alternative reinforcement was suspended in Phase 3. For groups that received no alternative reinforcement, target‐lever pressing was less persistent following high‐rate than low‐rate Phase‐1 reinforcement. Target behavior was more persistent with low‐rate alternative reinforcement than with high‐rate alternative reinforcement or extinction alone. Finally, no differences in Phase‐3 responding were observed for groups that received either high‐rate or low‐rate alternative reinforcement, and resurgence occurred only following high‐rate alternative reinforcement. These findings are inconsistent with the momentum‐based model of resurgence. We conclude this model mischaracterizes the effects of reinforcer rates on persistence and resurgence of operant behavior. 相似文献
178.
179.
Craig S. Cashwell 《Counseling and values》2016,61(2):133-134
180.
Craig Thorley Stephen A. Dewhurst Joseph W. Abel Lauren M. Knott 《Memory (Hove, England)》2016,24(6):838-852
The police often appeal for eyewitnesses to events that were unlikely to have been emotive when observed. An eyewitness, however, may be in a negative mood whilst encoding or retrieving such events as mood can be influenced by a range of personal, social, and environmental factors. For example, bad weather can induce a negative mood. This experiment compared the impact of negative and neutral moods during encoding and/or retrieval upon eyewitness recall of a non-emotive event. A negative mood during encoding had no impact upon the number of correct details recalled (provided participants were in a neutral mood at retrieval) but a negative mood during retrieval impaired the number of correct details recalled (provided participants were in a neutral mood at encoding). A negative mood at both time points enhanced the number of correct details recalled, demonstrating a mood-dependent memory enhancement. The forensic implications of these findings are discussed. 相似文献