全文获取类型
收费全文 | 2257篇 |
免费 | 122篇 |
国内免费 | 3篇 |
出版年
2023年 | 15篇 |
2022年 | 22篇 |
2021年 | 36篇 |
2020年 | 37篇 |
2019年 | 51篇 |
2018年 | 72篇 |
2017年 | 76篇 |
2016年 | 92篇 |
2015年 | 53篇 |
2014年 | 70篇 |
2013年 | 281篇 |
2012年 | 126篇 |
2011年 | 113篇 |
2010年 | 98篇 |
2009年 | 75篇 |
2008年 | 106篇 |
2007年 | 102篇 |
2006年 | 93篇 |
2005年 | 81篇 |
2004年 | 74篇 |
2003年 | 80篇 |
2002年 | 68篇 |
2001年 | 41篇 |
2000年 | 38篇 |
1999年 | 37篇 |
1998年 | 23篇 |
1997年 | 17篇 |
1996年 | 31篇 |
1995年 | 19篇 |
1994年 | 14篇 |
1993年 | 14篇 |
1992年 | 26篇 |
1991年 | 20篇 |
1990年 | 17篇 |
1989年 | 11篇 |
1988年 | 22篇 |
1987年 | 17篇 |
1986年 | 16篇 |
1985年 | 12篇 |
1984年 | 24篇 |
1982年 | 9篇 |
1981年 | 9篇 |
1980年 | 11篇 |
1979年 | 7篇 |
1978年 | 10篇 |
1973年 | 8篇 |
1972年 | 14篇 |
1971年 | 7篇 |
1969年 | 10篇 |
1968年 | 9篇 |
排序方式: 共有2382条查询结果,搜索用时 78 毫秒
931.
Self-management of attendance by problem adolescents was shown to improve attendance in an alternative school. The use of biased measures to investigate change is discussed as well as the utility of frequent measures. The effect of improved attendance on academics is presented and future research in this area is suggested. 相似文献
932.
Twenty presentations of 6 emotional and 6 non-emotional words in mixed random orders were monaurally presented to the right or left ear. Using the left hand, subjects pushed one of two response buttons indicating type of word heard. Performance improved in later trials and emotional words were recognized more quickly regardless of ear presentation. No differences were associated with the separate ear presentations. Equivalent hemispheric performance indicates equal processing sensitivity to four-letter emotional and non-emotional nouns and substantiates the right hemisphere's verbal processing capability for simple nouns. 相似文献
933.
Twenty-two disturbed enuretic children were treated for their bedwetting with training procedures. Eighteen of 22 (81.8%) reached the initial success criterion in an average of 57.5 days. Ten of the 18 (55.6%) met the retraining criteria of relapse, and 9 of the relapses were successfully retrained, while I stopped wetting spontaneously. As compared to non-relapsed children, relapsed children had a significantly higher number of initial symptoms checked. The results indicate that a training approach is effective for the treatment of enuresis in disturbed children, but the more disturbed have a greater likelihood of relapse. 相似文献
934.
The ability of 15 control, 15 nonaphasic brain-damaged, and 15 aphasic patients to carry out three-word commands on the Token Test was studied under three conditions: no delay, 20-sec unfilled delay, and 20-sec delay filled with a counting task. Only aphasics with mild to moderate comprehension deficit participated in the experiment and their scores in the no-delay condition were not inferior to those of the other two groups. The 20-sec unfilled delay did not bring about a decrement of the performance in any group, while all of them were impaired with 20-sec filled delay. The rate of forgetting was, however, significantly greater in aphasics than in patients without language disorders, even when the scores of the no-delay condition were introduced as covariates in the analysis of the filled-delay condition. The same result was obtained when, in a second experiment, 4 sec elapsed between the end of the command and the beginning of the counting activity. The increased susceptibility of aphasics to the disruptive effect of the distractor task is viewed as following a failure in organizing verbal information, a deficit that may contribute to lowering their comprehension level. 相似文献
935.
P. E. Schenck H. Van De Giessen A. Koos Slob J. J. Van Der Werff Ten Bosch 《Behavior research methods》1978,10(4):552-556
An automated plus maze is described that is capable of recording the locomotor activity of 12 rats simultaneously. The system is built around an 8008 microprocessor chip from INTEL. The base of the system is formed by 12 plus mazes in which the activity of the animals under test can be monitored. 相似文献
936.
After pretraining with multiple variable-interval avoidance schedules, two rats were exposed to a series of concurrent variable-interval avoidance schedules. Responses on two levers cancelled delivery of electric shocks arranged according to two independent variable-interval schedules. The ratio of responses and time spent on the two levers approximately matched the ratio of shocks avoided on each. Matching to the number of shocks received was not obtained. Concurrent variable-interval avoidance can therefore be added to the group of positive and negative reinforcement schedules that can be expressed in the quantitative framework of the matching law. 相似文献
937.
Undergraduates were shown pictures or corresponding labels and then were tested for recognition either in the same mode or in a cross-over mode. Significantly more items were recognized in the picture-picture condition than in the picture-word and word-picture conditions. Informing subjects in advance of the change in modality significantly improved picture-word performance. 相似文献
938.
The influence of decision task and deliberation style on the verdict of the juries. In the Kameda's Deliberation Style Model the emission of verdicts of responsibility when the deliberation style of the juries (elemental/compound) and the type of decision task (disjunctive/conjunctive) are jointly manipulated, is favoured in certain conditions. Given the consequences that these approaches could have in real judicial processes, this model is analyzed using a manslaughter crime under the Spanish judicial context conditions (nine members juries and seven or five members majorities emitting a verdict of guilty or not guilty, respectively). The obtained results indicated a better operation of the model when a conjunctive decision task was demanded. 相似文献
939.
We investigated whether the alignment effect (Levine et al, 1982 Journal of Experimental Psychology: General 111 157-175) is influenced by mental rotation abilities. In two experiments, groups of undergraduate students with high and low performance in mental rotation tasks were required to study either schematic (experiment 1) or more complex (experiment 2) maps, and to perform a number of pointing tasks adopting a perspective which could be aligned, misaligned (45 degrees, 135 degrees), or counteraligned (180 degrees) with the perspective assumed during learning. Cognitive styles in spatial representation have also been considered. Results of experiment 1 show that people with low performance in mental rotation tasks prefer to adopt a representation of space focused more on landmarks. Their performance in the pointing tasks depends on the alignment conditions, with more errors in the counteraligned condition followed by the two misaligned and aligned ones. In contrast to this, high-ability mental rotators prefer survey and route spatial representations and are affected only by the aligned and non-aligned conditions. In the second experiment, practice was studied as a function of mental rotation and alignment. The group high in mental rotation ability was found to be free from the alignment effect in the pointing tasks performed after the final of four learning phases. 相似文献
940.
Kart-Teke E De Souza Silva MA Huston JP Dere E 《Neurobiology of learning and memory》2006,85(2):173-182
Human episodic memory refers to the recollection of an unique past experience in terms of its details, its locale, and temporal occurrence. Episodic memory, even in principle, has been difficult to demonstrate in non-verbal mammals. Previously, we provided evidence that mice are able to form an integrated memory for "what," "where," and "when" aspects of single experiences by combining different versions of the novelty-preference paradigm, i.e., object recognition memory, the memory for locations in which objects were explored, and the temporal order memory for objects presented at distinct time points. In the present series of experiments we evaluated whether this paradigm, with minor modifications, also works with rats. We found that rats spent more time exploring an "old familiar" object relative to a "recent familiar" object, suggesting that they recognized objects previously explored during separate trials and remembered their order of presentation. Concurrently, the rats responded differentially to spatial object displacement dependent on whether an "old familiar" or "recent familiar" object was shifted to a location, where it was not encountered previously. These results provide strong evidence that the rats established an integrated memory for "what," "where," and "when." We also found that acute stress impaired the animal's performance in the episodic-like memory task, which, however, could be partially reversed by the N-Methyl-D-aspartate-receptors agonist D-cycloserine. 相似文献