全文获取类型
收费全文 | 1177篇 |
免费 | 49篇 |
专业分类
1226篇 |
出版年
2021年 | 10篇 |
2020年 | 20篇 |
2019年 | 20篇 |
2018年 | 38篇 |
2017年 | 27篇 |
2016年 | 27篇 |
2015年 | 22篇 |
2014年 | 23篇 |
2013年 | 120篇 |
2012年 | 33篇 |
2011年 | 46篇 |
2010年 | 24篇 |
2009年 | 28篇 |
2008年 | 48篇 |
2007年 | 50篇 |
2006年 | 39篇 |
2005年 | 43篇 |
2004年 | 28篇 |
2003年 | 32篇 |
2002年 | 27篇 |
2001年 | 26篇 |
2000年 | 23篇 |
1999年 | 30篇 |
1998年 | 22篇 |
1996年 | 18篇 |
1995年 | 16篇 |
1994年 | 12篇 |
1993年 | 10篇 |
1992年 | 11篇 |
1991年 | 10篇 |
1990年 | 10篇 |
1989年 | 13篇 |
1988年 | 19篇 |
1987年 | 11篇 |
1986年 | 12篇 |
1985年 | 16篇 |
1984年 | 16篇 |
1982年 | 15篇 |
1981年 | 12篇 |
1980年 | 11篇 |
1979年 | 18篇 |
1977年 | 15篇 |
1976年 | 13篇 |
1974年 | 13篇 |
1973年 | 19篇 |
1972年 | 11篇 |
1971年 | 11篇 |
1970年 | 13篇 |
1969年 | 10篇 |
1968年 | 10篇 |
排序方式: 共有1226条查询结果,搜索用时 0 毫秒
991.
992.
A modified technique for permanently implanted electrodes in the weanling rat is presented. As a reliable and durable technique, long-term stimulation of the juvenile rat is made possible. 相似文献
993.
994.
Ss wrote down letters that were presented briefly in various temporal and geometric arrangements. Results reveal marked impairment in processing more than one temporally extended word in parallel. The impairment cannot be attributed to spatial separation of letters by itself, to sequence, or to inability to discriminate the letters. The concept of ‘bounding’ is introduced to account for the perception of familiar words in a continuing flow of information; the results suggest that only one object can be bounded at a time. They also suggest that the information that guides the eyes' movements in reading is qualitatively different from the information extracted from the printed text. 相似文献
995.
Mark F. Lewis 《Attention, perception & psychophysics》1968,4(4):241-244
Two-flash thresholds were obtained from three dark-adapted Ss by means of a two-interval, temporal forced-choice technique involving foveally fixated circular targets varying in luminance and area. The Ss were instructed to report the temporal position of the longer of two pairs of I-msec flashes. a comparison pair with an interflash interval of 1 msec, and a test pair with a varying interflasn interval. The Ss were informed about the accuracy of their responses after each response. For all three Ss the results replicated a previous finding that two-flash thresholds are a negatively accelerated function of flash luminance. but the function was shown to be dependent on area. a greater threshold change occurring at smaller areas. Two-flash thresholds were also found to be a decreasing function of stimulus area. with the greatest threshold change occurring at low luminances. 相似文献
996.
Daniel H Ashmead Bernice M Reilly Lewis P Lipsitt 《Journal of experimental child psychology》1980,29(2):264-281
In previous studies of human newborn sucking, the effects of increasing fluid sweetness and/or volume included a decrease in sucking rate within sucking bursts and, paradoxically, an increase in heart rate. To determine whether the heart rate increase can be attributed to increased sucking amplitude for sweeter fluids, sucking and heart rates of 20 full-term infants were studied. Half sucked for three consecutive 2-min periods, first receiving small drops of water for each suck, then no fluid, then 15% sucrose. The other half experienced the reverse order. The results for sucking and heart rate were consistent with previous studies; sucking rates within bursts were slowest for sucrose and fastest for no fluid. Heart rate was higher for sucrose than for the other fluid conditions, however, only in the water-first group. The heart rate increase was significant on statistical tests which controlled for sucking amplitude as well as for several other motor variables. Sucking amplitude itself varied with fluid sweetness in the water-first group only, in which it was highest for water. There were more total sucks, longer sucking bursts, and less time between successive bursts under the sucrose condition. Multivariate statistics helped establish a set of dependent variables—sucking rate within bursts, total number of sucks, and heart rate—which most parsimoniously describes the effects of fluid sweetness. A hedonic explanation of the response of newborns to sweetness is thus reiterated. 相似文献
997.
998.
J. Brown V. J. Lewis A. F. Monk 《Quarterly journal of experimental psychology (2006)》1977,29(3):461-473
Brown (1976) has provided an analysis of the effect of the memorability of an item on the confidence with which it is accepted or rejected in a test of recognition or recall. When the subject has no clear recollection of the inclusion of an item in an input list, he is assumed to evaluate its memorability in the context of the experiment before he decides whether to accept or reject it. If the judged memorability is high, the absence of a clear recollection is stronger evidence against the item than if it is low. A specific prediction is that memorable distractors in a recognition test will be more confidently rejected than non-memorable ones. This prediction was tested and confirmed in three experiments in which recognition was tested by 4-category rating. Except in Experiment I, items memorable to individual subjects were identified by administering a questionnaire. For example, in Experiment III forenames of immediate family were assumed to have high memorability. This experiment also included word frequency as a variable. Low-frequency distractors were rejected significantly more firmly than high-frequency distractors: extraction of memorable names enhanced this effect. The relationship of memorability to word frequency is discussed. 相似文献
999.
1000.
Albert M. Lewis Ph. D. 《Pastoral Psychology》1982,31(1):51-57
The institutionalization of an aged parent presents unique challenges and strains to the family system. It also provides opportunities for limited intervention and support by empathic clergy. It is often difficult for middle-aged children to understand some of the strong and often sudden emotions they experience regarding their institutionalized parents, particularly as these feelings become confused with their own sense of having reached middle age. Again, opportunities present themselves for clergy to be sensitive to these confusing feelings. 相似文献