全文获取类型
收费全文 | 33401篇 |
免费 | 584篇 |
国内免费 | 13篇 |
专业分类
33998篇 |
出版年
2023年 | 73篇 |
2021年 | 117篇 |
2020年 | 213篇 |
2019年 | 263篇 |
2018年 | 3725篇 |
2017年 | 3085篇 |
2016年 | 2541篇 |
2015年 | 448篇 |
2014年 | 414篇 |
2013年 | 1588篇 |
2012年 | 1142篇 |
2011年 | 2951篇 |
2010年 | 2814篇 |
2009年 | 1840篇 |
2008年 | 2195篇 |
2007年 | 2657篇 |
2006年 | 590篇 |
2005年 | 719篇 |
2004年 | 636篇 |
2003年 | 604篇 |
2002年 | 544篇 |
2001年 | 272篇 |
2000年 | 270篇 |
1999年 | 231篇 |
1998年 | 218篇 |
1997年 | 229篇 |
1996年 | 199篇 |
1995年 | 169篇 |
1994年 | 159篇 |
1993年 | 153篇 |
1992年 | 141篇 |
1991年 | 153篇 |
1990年 | 142篇 |
1989年 | 120篇 |
1988年 | 88篇 |
1987年 | 117篇 |
1986年 | 127篇 |
1985年 | 163篇 |
1984年 | 160篇 |
1983年 | 138篇 |
1982年 | 130篇 |
1981年 | 144篇 |
1980年 | 124篇 |
1979年 | 108篇 |
1978年 | 122篇 |
1977年 | 108篇 |
1976年 | 108篇 |
1975年 | 95篇 |
1974年 | 105篇 |
1973年 | 87篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
841.
Fromholt P Mortensen DB Torpdahl P Bender L Larsen P Rubin DC 《Memory (Hove, England)》2003,11(1):81-88
Centenarians provided autobiographical memories to either a request for a life narrative or a request to produce autobiographical memories to cue words. Both methods produced distributions with childhood-amnesia, reminiscence-bump, and recency components. The life-narrative method produced relatively more bump memories at the expense of recent memories. The life-narrative distributions were similar to those obtained from 80-year-old adults without clinical symptoms and from 80-year-old Alzheimer's dementia and depression patients, except that the centenarians had an additional 20-year period of relatively low recall between the bump and recency components. The centenarians produced more emotionally neutral memories than the other three groups and produced fewer and less detailed memories than the non-clinical 80-year-old sample. 相似文献
842.
Directive functions of autobiographical memory: the guiding power of the specific episode 总被引:4,自引:0,他引:4
Pillemer DB 《Memory (Hove, England)》2003,11(2):193-202
Vivid memories of personal experiences provide models for present activities and contribute to successful problem solving and adaptation. The memories serve important directive functions: they inform, guide, motivate, and inspire. Yet directive functions have received less emphasis in the research literature than social or self functions. Explanations for this relative neglect are explored. Case studies and systematic research illustrate the prominence of memory directives in everyday life. Empirical studies that have compared memory functions are examined critically, reasons why directive functions may be underestimated using existing methods are discussed, and ideas for future research are outlined. 相似文献
843.
Accountability and cooperation in social dilemmas: The influence of others’ reputational concerns 总被引:1,自引:0,他引:1
David?De?CremerEmail author Müriel?Barker 《Current psychology (New Brunswick, N.J.)》2003,22(2):155-163
The present study examined the assumption that non-anonymous choices in social dilemmas (i.e., choices for which one is accountable)
may influence cooperation, but only to the extent that decision-makers believe that the others will evaluate non-cooperation
negatively. Based on a recent review by Kerr (1999), it was expected that under conditions of accountability, decision-makers
would cooperate more when they believed that the others within the group were also concerned about their social reputation
and therefore were aware of the social norm of cooperation within social dilemmas. As a consequence, it could be expected
that non-cooperation by oneself would be evaluated negatively by those others since they seemed to be aware of what ought
to be done in a social dilemma (i.e., the norm of cooperation). Results confirmed these predictions and, in addition, also
showed that greater willingness to cooperate was associated with stronger feelings of collective concern. The findings are
discussed in terms of recent literature on anonymity effects in social dilemmas.
This research was part of the second author's master thesis at Maastricht University. The first author was supported by a
fellowship of the Netherlands Organization for Scientific Research (NWO, no. 016.005.019). 相似文献
844.
During the standardization of the Wechsler Adult Intelligence Scale (3rd ed.; WAIS-III) and the Wechsler Memory Scale (3rd ed.; WMS-III) the participants in the normative study completed both scales. This "co-norming" methodology set the stage for full integration of the 2 tests and the development of an expanded structure of cognitive functioning. Until now, however, the WAIS-III and WMS-III had not been examined together in a factor analytic study. This article presents a series of confirmatory factor analyses to determine the joint WAIS-III and WMS-III factor structure. Using a structural equation modeling approach, a 6-factor model that included verbal, perceptual, processing speed, working memory, auditory memory, and visual memory constructs provided the best model fit to the data. Allowing select subtests to load simultaneously on 2 factors improved model fit and indicated that some subtests are multifaceted. The results were then replicated in a large cross-validation sample (N = 858). 相似文献
845.
Wilde NJ Strauss E Chelune GJ Hermann BP Hunter M Loring DW Martin RC Sherman EM 《心理评价》2003,15(1):56-63
Five competing models specifying the factor structure underlying the Wechsler Memory Scale-Third Edition (D. Wechsler, 1997b) primary subtest scores were evaluated in a sample of patients with intractable temporal lobe epilepsy (N = 254). Models specifying separate immediate and delayed constructs resulted in inadmissible parameter estimates and model specification error. There were negligible goodness-of-fit differences between a 3-factor model of working memory, auditory memory, and visual memory and a nested--more parsimonious--2-factor model of working memory and general memory. The results suggest that specifying a separate visual memory factor provides little advantage for this sample--an unexpected finding in a population with lateralized dysfunction, for which one might have predicted separate auditory and visual memory dimensions. 相似文献
846.
847.
Temporal integration is a process by which two serially presented visual stimuli are mentally integrated to form a composite representation. In the present research, we explored how spatial selective attention is used during the delay separating stimuli, in order to determine the contents of spatial working memory in this task. A two-task situation was created. On the primary task, two dot arrays were serially presented within a grid, leaving one space empty, which subjects identified. On the secondary task, instead of the second array, a discrimination probe was presented. Integration accuracy increased through delays of 1,500 msec, revealing an estimate of the time required to form an optimal memory trace for integration. Once the memory trace was formed (but not before), response time to the probe was faster if it was presented in a location previously occupied by a dot from Array 1. This indicates that during the delay separating the arrays, the subjects assigned spatial attention to the locations occupied by the first array and actively maintained the leading array in working memory. Implications for theories of visual processing and memory are discussed. 相似文献
848.
Thirty-six university students were tested in a plausibility judgment task using a self-paced listening paradigm under no-interference
and two-digit load conditions. Listening times were longer at syntactically more complex portions of syntactically more complex
sentences, and greater loads led to increased listening times. However, listening times at syntactically more complex positions
in syntactically more complex sentences did not increase more than listening times at comparable positions in syntactically
simple sentences under digit load conditions. The results indicate that a concurrent memory load does not reduce the availability
of working memory resources used for on-line syntactic processing and, thus, provide evidence that the working memory system
used for assigning syntactic structure is separate from that measured by standard working memory tasks. 相似文献
849.
Do readers encode the perceptual perspectives of characters during narrative comprehension? To address this question, we conducted two experiments using stories that sometimes described situations in which certain information was occluded from the protagonists’ views. We generated two related hypotheses concerning the potential impact of occlusion events on text representations. One, theevent boundary hypothesis, suggested that any salient narrative event would reduce the accessibility of prior story information. The second, theperceptual availability hypothesis, suggested that accessibility would decrease most for information no longer visible to story protagonists. In Experiment 1, the participants were slowest to respond to verification questions that asked about occluded information. In Experiment 2, we demonstrated that this effect did not extend to other, nonoccluded information. These results suggest that readers encode text information from the perceptual perspective of story protagonists. This is consistent with recent perceptual symbol views of language comprehension. 相似文献
850.
Woodson JC Macintosh D Fleshner M Diamond DM 《Learning & memory (Cold Spring Harbor, N.Y.)》2003,10(5):326-336
We have shown previously that psychological stress (predator exposure) impairs spatial memory in rats. We have extended that finding here to show that predator stress selectively impaired recently acquired (hippocampal-dependent) spatial working memory without affecting long-term (hippocampal-independent) spatial reference memory. We also investigated why predator exposure impairs memory. Was spatial memory impaired because of the fear-provoking aspects of predator exposure or only because the cat was a novel and arousing stimulus? If the latter possibility was correct, then any novel and arousing stimulus, independent of its emotional valence (i.e., aversive or appetitive), would impair memory. We found that spatial working memory was not impaired when the male rats were exposed to a sexually receptive female rat, a stimulus that was novel and arousing to them, but not aversive. We also found that there was an equivalent increase in serum corticosterone levels in male rats exposed to either a cat or a female rat, but only the cat-exposed rats exhibited a significant correlation between corticosterone levels and impaired memory. Overall, this series of experiments demonstrates that (1). predator stress selectively impaired working (hippocampal-dependent), but not reference (hippocampal-independent), memory; (2). a fear-provoking stimulus, and not merely novelty and increased arousal, impaired spatial memory; and (3). increased corticosterone levels correlated with impaired spatial working memory only under predator exposure, that is, fear-provoking conditions. 相似文献