全文获取类型
| 收费全文 | 5763篇 |
| 免费 | 75篇 |
| 国内免费 | 1篇 |
专业分类
| 5839篇 |
出版年
| 2024年 | 59篇 |
| 2023年 | 64篇 |
| 2022年 | 90篇 |
| 2021年 | 109篇 |
| 2020年 | 150篇 |
| 2019年 | 139篇 |
| 2018年 | 270篇 |
| 2017年 | 258篇 |
| 2016年 | 238篇 |
| 2015年 | 151篇 |
| 2014年 | 171篇 |
| 2013年 | 727篇 |
| 2012年 | 419篇 |
| 2011年 | 419篇 |
| 2010年 | 260篇 |
| 2009年 | 176篇 |
| 2008年 | 321篇 |
| 2007年 | 268篇 |
| 2006年 | 239篇 |
| 2005年 | 222篇 |
| 2004年 | 129篇 |
| 2003年 | 140篇 |
| 2002年 | 129篇 |
| 2001年 | 63篇 |
| 2000年 | 78篇 |
| 1999年 | 47篇 |
| 1998年 | 30篇 |
| 1997年 | 19篇 |
| 1996年 | 24篇 |
| 1995年 | 19篇 |
| 1994年 | 12篇 |
| 1993年 | 18篇 |
| 1992年 | 30篇 |
| 1991年 | 20篇 |
| 1990年 | 25篇 |
| 1989年 | 26篇 |
| 1988年 | 26篇 |
| 1987年 | 16篇 |
| 1985年 | 12篇 |
| 1984年 | 16篇 |
| 1983年 | 13篇 |
| 1979年 | 15篇 |
| 1978年 | 11篇 |
| 1976年 | 13篇 |
| 1974年 | 11篇 |
| 1971年 | 10篇 |
| 1970年 | 10篇 |
| 1968年 | 11篇 |
| 1966年 | 9篇 |
| 1965年 | 10篇 |
排序方式： 共有5839条查询结果，搜索用时 0 毫秒
841.
The purpose of this study was to identify patterns in Portuguese television advertisements and interpret changes in the portrayal of gender roles using data collected 7 years apart: 1996 and 2003. We grouped 11 attributes of the central figure displayed in 623 evening commercials using a k‐means cluster procedure. There were 4 distinct groups of advertisements that emerged, 2 of them characterizing a predominantly male central figure and the other 2 a female central figure. The overall increase in women portrayed in advertisements from 1996 (32.9%) to 2003 (40.8%) is reflected in a shift toward an increase of advertisements with a female central figure in the typically male “narrator” cluster. Practical implications of these findings are discussed. 相似文献
842.
843.
Legendre G 《Cognitive Science》2006,30(5):803-835
This article reports on a series of 5 analyses of spontaneous production of verbal inflection (tense and person–number agreement) by 2-year-olds acquiring French as a native language. A formal analysis of the qualitative and quantitative results is developed using the unique resources of Optimality Theory (OT; Prince & Smolensky, 2004). It is argued that acquisition of morphosyntax proceeds via overlapping grammars (rather than through abrupt changes), which OT formalizes in terms of partial rather than total constraint rankings. Initially, economy of structure constraints take priority over faithfulness constraints that demand faithful expression of a speaker's intent, resulting in child production of tense that is comparable in level to that of child-directed speech. Using the independent Predominant Length of Utterance measure of syntactic development proposed in Vainikka, Legendre, and Todorova (1999), production of agreement is shown first to lag behind tense then to compete with tense at an intermediate stage of development. As the child's development progresses, faithfulness constraints become more dominant, and the overall production of tense and agreement becomes adult-like. 相似文献
844.
Reliable data on the relationships between situational and dispositional coping strategies are sparse. In order to address this gap in the literature, this study examined the determinants and adaptational outcomes of both types of coping. Two hundred and thirty‐three students completed, along with measures of situational and dispositional coping, measures of personality, cognitive appraisals, and psychological distress, the latter variable being evaluated concurrently and prospectively (10 weeks). Results showed that personality shared as much variance with situational as with dispositional coping, but the patterns of relationships were rather different. In addition, cognitive appraisals were found to add significant incremental validity in predicting situational coping beyond trait coping, but primary appraisals were redundant with personality traits, in particular neuroticism. Finally, in spite of the significant amount of variance shared between the two types of coping, they both accounted for individual differences in concomitant and prospective psychological distress, and the relation between dispositional coping and distress was partially mediated by situational coping. The implications of these findings for understanding the relationships between the two types of coping strategy are discussed. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
845.
Human analog tests of object permanence were administered to various breeds of adult dogs (Canis familiaris). Experiment 1 showed that the performance of terriers, sporting, and working dogs did not differ. Dogs succeeded in solving invisible displacement problems, but performance was lower than in visible displacement tests. Familiarity with the task had some influence because invisible displacement tests were more successful if they were preceded by visible displacement tests. In Experiment 2, odor cues from the target object and the hiding screens were available or were masked. Results confirmed that success was lower in invisible than in visible displacement tests and that these problems were solved on the basis of representation of visual information rather than on the basis of olfactory cues or of local rule learning. Dogs are compared with other species that display Stage 6 object permanence. 相似文献
846.
Evidence for central nervous system, and more particularly cortical, etiology of anorexia nervosa is reviewed. Topics covered are neuropsychiatric comorbidity, inheritance patterns, the neurobiology of body-image disturbance and of the eating function, perinatal and alcoholic insult to the brain, neurochemical and neuroelectric disturbance, anatomic and metabolic brain imaging, and neuropsychological impairment. It is concluded that there is indeed an important neuropsychological etiological dimension to anorexia nervosa. The profile most frequently associated with anorexia nervosa is right posterior hypometabolism, followed by right anterior hypermetabolism, both associated with right-sided abnormal electroencephalogram spiking. It is also proposed that bulimia consists of a positive neurological subtype and that restricting anorexia represents a negative neurological subtype. Priorities for further research into anorexia nervosa are specified to include twin adoption studies, brain electrical topography studies, postmortem histological studies, and experimentally inspired neuropsychological studies. 相似文献
847.
Anxiety, nausea and vomiting before, during and after chemotherapy administration were studied in 50 cancer patients. In addition, patient responses to the Autonomic Perception Questionnaire (APQ) and their relation to the anxiety, nausea and vomiting scores was studied. Anticipatory anxiety occurred in 66% and anticipatory nausea in 40% of the patients; 14% showed anticipatory vomiting. The number of patients reporting anxiety decreased to 38% after chemotherapy, whereas nausea and vomiting increased to 47 and 49%, respectively. APQ scores correlated significantly with anxiety and nausea reports during all time periods, but not with the frequency of vomiting. 相似文献
848.
Peri-traumatic information processing is thought to affect the development of intrusive trauma memories. This study aimed to replicate and improve the study by Holmes, Brewin, and Hennessy (2004, Exp. 3) on the role of peri-traumatic verbal processing in analogue traumatic intrusion development. Participants viewed an aversive film under one of three conditions: counting backwards in 3s (“verbal interference”), verbalising emotions and thoughts (“verbal enhancement”), or without an extra task. A dual-process account of PTSD would predict that verbal interference would increase intrusion frequency compared to no task, whereas verbal enhancement would lead to a decrease. In contrast, mainstream memory theory predicts a decrease in intrusion frequency from any concurrent task that diverts attention away from the trauma film. The main finding was that the verbal interference task led to a decrease in intrusive memories of the film compared to the other two conditions. This finding does not support a dual-process account of PTSD, but is in line with general theories of memory and attention. 相似文献
849.
Clémence Verhaegen Fabienne Collette Steve Majerus 《Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition》2014,21(4):464-482
The aim of this study is to assess the impact of hearing status on age-related decrease in verbal short-term memory (STM) performance. This was done by administering a battery of verbal STM tasks to elderly and young adult participants matched for hearing thresholds, as well as to young normal-hearing control participants. The matching procedure allowed us to assess the importance of hearing loss as an explanatory factor of age-related STM decline. We observed that elderly participants and hearing-matched young participants showed equal levels of performance in all verbal STM tasks, and performed overall lower than the normal-hearing young control participants. This study provides evidence for recent theoretical accounts considering reduced hearing level as an important explanatory factor of poor auditory-verbal STM performance in older adults. 相似文献
850.
Kathie Crocket Elmarie Kotzé Paul Flanagan 《Counselling and Psychotherapy Research》2014,14(2):138-138