全文获取类型
收费全文 | 11129篇 |
免费 | 525篇 |
国内免费 | 3篇 |
专业分类
11657篇 |
出版年
2020年 | 148篇 |
2019年 | 153篇 |
2018年 | 272篇 |
2017年 | 239篇 |
2016年 | 246篇 |
2015年 | 181篇 |
2014年 | 204篇 |
2013年 | 826篇 |
2012年 | 345篇 |
2011年 | 387篇 |
2010年 | 230篇 |
2009年 | 187篇 |
2008年 | 309篇 |
2007年 | 289篇 |
2006年 | 272篇 |
2005年 | 216篇 |
2004年 | 209篇 |
2003年 | 187篇 |
2002年 | 196篇 |
2001年 | 417篇 |
2000年 | 388篇 |
1999年 | 267篇 |
1998年 | 106篇 |
1996年 | 92篇 |
1995年 | 94篇 |
1992年 | 209篇 |
1991年 | 215篇 |
1990年 | 203篇 |
1989年 | 202篇 |
1988年 | 206篇 |
1987年 | 184篇 |
1986年 | 172篇 |
1985年 | 172篇 |
1984年 | 158篇 |
1983年 | 114篇 |
1982年 | 114篇 |
1979年 | 149篇 |
1978年 | 94篇 |
1977年 | 95篇 |
1976年 | 91篇 |
1975年 | 138篇 |
1974年 | 157篇 |
1973年 | 181篇 |
1972年 | 155篇 |
1971年 | 141篇 |
1970年 | 124篇 |
1969年 | 133篇 |
1968年 | 176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 0 毫秒
861.
862.
At 6 months following the death of their spouse, 37 participants reported their grief-related symptoms and thoughts, and then, approximately 4.5 years later, they attempted to recall how they felt at the time of the 6-month report. Although participants were far less distressed at recall than initially, they recalled their 6-month grief rather accurately. Participants did however overestimate prior grief-related intrusive ideation. Participant's current level of grief predicted what they recalled slightly better than the actual initial grief. Conversely, what they recalled predicted current levels of grief across various measures. Participants whose grief diminished relatively little over time tended to overestimate prior grief more. The retrospective reappraisal that one's past grief was not severe may indicate effective coping. 相似文献
863.
Viewpoint dependence in visual and haptic object recognition 总被引:5,自引:0,他引:5
On the whole, people recognize objects best when they see the objects from a familiar view and worse when they see the objects from views that were previously occluded from sight. Unexpectedly, we found haptic object recognition to be viewpoint-specific as well, even though hand movements were unrestricted. This viewpoint dependence was due to the hands preferring the back "view" of the objects. Furthermore, when the sensory modalities (visual vs. haptic) differed between learning an object and recognizing it, recognition performance was best when the objects were rotated back-to-front between learning and recognition. Our data indicate that the visual system recognizes the front view of objects best, whereas the hand recognizes objects best from the back. 相似文献
864.
This review discusses the research published in the last five years on the behavioral, genetic, medical, and neuroscience aspects of Down syndrome. The subject areas that have experienced the most active research include Alzheimer disease, language development, leukemia, and pregnancy screening and diagnosis. These and other areas are reviewed. 相似文献
865.
Treasure JL Katzman M Schmidt U Troop N Todd G de Silva P 《Behaviour research and therapy》1999,37(5):405-418
Despite the major advances in the development of treatments for bulimia nervosa, drop-outs and a lack of engagement in treatment, continue to be problems. Recent studies suggest that the transtheoretical model of change may be applicable to bulimia nervosa. The aim of this study was to examine the roles of readiness to change and therapeutic alliance in determining engagement and outcome in the first phase of treatment. One hundred and twenty five consecutive female patients meeting DSM-IV criteria for bulimia nervosa took part in a randomised controlled treatment trial. The first phase of the sequential treatment compared four sessions of either cognitive behavioural therapy (CBT) or motivational enhancement therapy (MET) in engaging patients in treatment and reducing symptoms. Patients in the action stage showed greater improvement in symptoms of binge eating than did patients in the contemplation stage. Higher pretreatment scores on action were also related to the development of a better therapeutic alliance (as perceived by patients) after four weeks. However, pretreatment stage of change did not predict who dropped out of treatment. There were no differences between MET and CBT in terms of reducing bulimic symptoms or in terms of developing a therapeutic alliance or increasing readiness to change. The results suggest that the transtheoretical model of change may have some validity in the treatment of bulimia nervosa although current measures of readiness to change may require modification. Overall, readiness to change is more strongly related to improvement and the development of a therapeutic alliance than the specific type of treatment. 相似文献
866.
The doomsday argument is alive and kicking 总被引:2,自引:0,他引:2
867.
N C Pecoraro W D Timberlake M Tinsley 《Journal of experimental psychology. Animal behavior processes》1999,25(2):153-167
Negative incentive contrast effects (NCEs) have typically been attributed to frustration or the decremental generalization of learned associations. The purpose of these experiments was to clarify the relation of NCEs to the repertoires of functional search behaviors evoked by incentive downshifts. Rats shifted from 32% to 4% sucrose-solution decreased consummatory responses but increased nose-down locomotion, orientation, location entries, and sampling of alternatives relative to unshifted controls. These changes in behavior were terminated or failed to occur under incentive upshifts. Furthermore, reward downshifts did not produce avoidance of the location of the shifted incentive. Increased search occurred whether or not alternative reward locations were available. Together the evidence suggests that NCEs are related to evoked search modes supporting a repertoire of functional behaviors related to finding food. 相似文献
868.
Attentional blink for color 总被引:2,自引:0,他引:2
Ross NE Jolicoeur P 《Journal of experimental psychology. Human perception and performance》1999,25(6):1483-1494
Colored letters were presented by means of rapid serial visual presentation (RSVP). Two letters (T1 and T2) were targets that required a speeded (T1) or delayed (T2) response. T1 was shown on half of the trials. Two tasks were performed in the experimental conditions. Task 1 required a discrimination between 2 letters (when T1 was shown) or an indication that T1 was absent. In Experiment 1, Task 2 was to detect the presence of a unique color in the RSVP stream (e.g., green in a stream of alternating red and gray). In Experiment 2, Task 2 was to report the color of the first colored letter to appear in the RSVP stream. The lag between T1 and T2 in the RSVP stream was manipulated. Accuracy of color reports in Task 2 was poor at shorter lags and improved as the lag was lengthened in both experiments, demonstrating an attentional blink for chromatic information. Theoretical implications of the results are discussed. 相似文献
869.
Fifty-six heroin addicts and 60 age-matched controls were offered choices between monetary rewards ($11-$80) available immediately and larger rewards ($25-$85) available after delays ranging from 1 week to 6 months. Participants had a 1-in-6 chance of winning a reward that they chose on one randomly selected trial. Delay-discounting rates were estimated from the pattern of participants' choices. The discounting model of impulsiveness (Ainslie, 1975) implies that delay-discounting rates are positively correlated with impulsiveness. On average, heroin addicts' discount rates were twice those of controls (p = .004), and discount rates were positively correlated with impulsivity as measured by self-report questionnaires (p < .05). The results lend external validity to the delay-discounting rate as a measure of impulsiveness, a characteristic associated with substance abuse. 相似文献
870.
In comparison to controls, patients with schizophrenia classically display (1) an overall slowing in response times (RTs) and (2) a disproportionate slowing in RTs in the conflict condition of the Stroop color/word interference task. These two effects appear repeatedly in the card version of the Stroop task but were not replicated in a number of studies using a computer item-by-item version of the task. The present study was aimed at understanding the exact nature of the increased interference classically found in the performance of patients with schizophrenia in the card version of the Stroop task. We used a computer trial-by-trial version in which we investigated the effects of two major methodological differences between the two versions: (1) blocked (card version) versus mixed (computer version) presentation of the neutral, congruent and conflict conditions and (2) presence (card version) versus absence (computer version) of distractors in the spatial surrounding of the target. We found an overall slowing in performance and a disproportionate slowing in the conflict condition for patients with schizophrenia but only when the target was surrounded by distractors (in Experiments 2 and 3). The data are discussed in terms of a deficit in selective attention and inhibitory processes in schizophrenia. 相似文献