首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   992篇
  免费   7篇
  999篇
  2023年   6篇
  2022年   3篇
  2021年   14篇
  2020年   19篇
  2019年   18篇
  2018年   16篇
  2017年   31篇
  2016年   23篇
  2015年   16篇
  2014年   17篇
  2013年   97篇
  2012年   43篇
  2011年   45篇
  2010年   36篇
  2009年   30篇
  2008年   52篇
  2007年   51篇
  2006年   37篇
  2005年   47篇
  2004年   48篇
  2003年   31篇
  2002年   45篇
  2001年   13篇
  2000年   15篇
  1999年   14篇
  1998年   19篇
  1997年   13篇
  1996年   7篇
  1995年   10篇
  1994年   11篇
  1993年   14篇
  1992年   15篇
  1991年   12篇
  1990年   9篇
  1989年   7篇
  1988年   14篇
  1987年   5篇
  1986年   8篇
  1985年   14篇
  1984年   14篇
  1983年   11篇
  1982年   8篇
  1981年   13篇
  1980年   7篇
  1979年   4篇
  1978年   5篇
  1977年   3篇
  1976年   2篇
  1970年   1篇
  1969年   1篇
排序方式: 共有999条查询结果,搜索用时 15 毫秒
891.
To examine Swanson, Nolan, and Pelham-IV (SNAP-IV) psychometric properties, parent (N = 1,613) and teacher (N = 1,205) data were collected from a random elementary school student sample in a longitudinal attention deficit hyperactivity disorder (ADHD) detection study. SNAP-IV reliability was acceptable. Factor structure indicated two ADHD factors and an oppositional defiant disorder (ODD) factor. Parent and teacher scores varied by gender and poverty status (d = .49-.56) but not age; only teacher scores varied by race (d = .25-.55). Screening and diagnostic utility was evaluated with likelihood ratios (LRs) and posttest probabilities. Parent SNAP-IV scores above 1.2 increased probability of concern (LR > 10) and above 1.8, of ADHD diagnosis (LR > 3). Teacher hyperactivity/impulsivity scores above 1.2 and inattention scores above 1.8 increased probabilities of concern only (LR = 4.2 and >5, respectively). Higher teacher scores for African American children and race differences in measurement models require future study.  相似文献   
892.
Collaborative problem solving may be used by older couples to optimize cognitive functioning, with some suggestion that older couples exhibit greater collaborative expertise. The study explored age differences in 2 aspects of collaborative expertise: spouses' knowledge of their own and their spouse's cognitive abilities and the ability to fit task control to these cognitive abilities. The participants were 300 middle-aged and older couples who completed a hypothetical errand task. The interactions were coded for control asserted by husbands and wives. Fluid intelligence was assessed, and spouses rated their own and their spouse's cognitive abilities. The results revealed no age differences in couple expertise, either in the ability to predict their own and their spouse's cognitive abilities or in the ability to fit task control to abilities. However, gender differences were found. Women fit task control to their own and their spouse's cognitive abilities; men only fit task control to their spouse's cognitive abilities. For women only, the fit between control and abilities was associated with better performance. The results indicate no age differences in couple expertise but point to gender as a factor in optimal collaboration.  相似文献   
893.
Sentences with non-canonical wh- movement are often difficult for individuals with agrammatic Broca's aphasia to understand (, inter alia). However, the explanation of this difficulty remains controversial, and little is known about how individuals with aphasia try to understand such sentences in real time. This study uses an eyetracking while listening paradigm to examine agrammatic aphasic individuals' on-line comprehension of movement sentences. Participants' eye-movements were monitored while they listened to brief stories and looked at visual displays depicting elements mentioned in the stories. The stories were followed by comprehension probes involving wh- movement. In line with previous results for young normal listeners [Sussman, R. S., & Sedivy, J. C. (2003). The time-course of processing syntactic dependencies: evidence from eye movements. Language and Cognitive Processes, 18, 143-161], the study finds that both older unimpaired control participants (n=8) and aphasic individuals (n=12) showed visual evidence of successful automatic comprehension of wh- questions (like "Who did the boy kiss that day at school?"). Specifically, both groups fixated on a picture corresponding to the moved element ("who," the person kissed in the story) at the position of the verb. Interestingly, aphasic participants showed qualitatively different fixation patterns for trials eliciting correct and incorrect responses. Aphasic individuals looked first to the moved-element picture and then to a competitor following the verb in the incorrect trials. However, they only showed looks to the moved-element picture for the correct trials, parallel to control participants. Furthermore, aphasic individuals' fixations during movement sentences were just as fast as control participants' fixations. These results are unexpected under slowed-processing accounts of aphasic comprehension deficits, in which the source of failed comprehension should be delayed application of the same processing routines used in successful comprehension. This pattern is also unexpected if aphasic individuals are using qualitatively different strategies than normals to comprehend such sentences, as under impaired-representation accounts of agrammatism. Instead, it suggests that agrammatic aphasic individuals may process wh- questions similarly to unimpaired individuals, but that this process often fails to facilitate off-line comprehension of sentences with wh- movement.  相似文献   
894.
Pregnant women (N=253) were recruited during their second trimester of pregnancy (M=22.3 weeks gestation) and assigned to depressed (N=83) and non-depressed groups based on a SCID diagnosis of depression. They were then given self-report measures on sleep disturbance, depression, anxiety and anger, and their urine was assayed for norepinephrine and cortisol. These measures were repeated during their third trimester (M=32.4 weeks). Their newborns were then observed during sleep. During both the second and third trimesters, the depressed women had more sleep disturbances and higher depression, anxiety and anger scores. They also had higher norepinephrine and cortisol levels. The newborns of the depressed mothers also had more sleep disturbances including less time in deep sleep and more time in indeterminate (disorganized) sleep, and they were more active and cried/fussed more.  相似文献   
895.
This survey of 760 university students examined differences in Internet-related problems and psychosocial functioning between four patterns of participation in online sexual information and entertainment activities. Students who did not participate in either online sexual activity were more satisfied with their offline life and more connected to friends and family. Those who engaged in both online sexual activities were more dependent on the Internet and reported lower offline functioning. Students who only sought sexual information maintained strong offline affiliations. Those who only sought entertainment did not report lower offline functioning. Respondents most deficient in offline social support did not report compensatory online support. Despite students' common participation in online sexual activities (OSA) as a venue for social and sexual development, those relying on the Internet and the affiliations it provides appear at risk of decreased social integration. The authors discussed the finding's implications for social and sexual development.  相似文献   
896.
The purpose of the current study was to predict the development of aggressive behavior from young children's respiratory sinus arrhythmia (RSA) and environmental quality. In a longitudinal sample of 213 children, baseline RSA, RSA suppression in response to a film of crying babies, and a composite measure of environmental quality (incorporating socioeconomic status and marital adjustment) were measured, and parent-reported aggression was assessed from 18 to 54 months of age. Predictions based on biological sensitivity-to-context/differential susceptibility and diathesis-stress models, as well as potential moderation by child sex, were examined. The interaction of baseline RSA with environmental quality predicted the development (slope) and 54-month intercept of mothers' reports of aggression. For girls only, the interaction between baseline RSA and environmental quality predicted the 18-month intercept of fathers' reports. In general, significant negative relations between RSA and aggression were found primarily at high levels of environmental quality. In addition, we found a significant Sex × RSA interaction predicting the slope and 54-month intercept of fathers' reports of aggression, such that RSA was negatively related to aggression for boys but not for girls. Contrary to predictions, no significant main effects or interactions were found for RSA suppression. The results provide mixed but not full support for differential susceptibility theory and provide little support for the diathesis-stress model.  相似文献   
897.
This research examined experiences of pregnancy and delivery as predictors of three subscales identified within the Edinburgh Postnatal Depression Scale (nonspecific depression, anhedonia, and anxiety). Mothers of babies under 1 year (N = 415) completed the Edinburgh Postnatal Depression Scale (EPDS) and gave information as to number of pregnancies, number of children, and their ratings of the difficulty of the course of pregnancy and delivery. Number of pregnancies and number of children did not predict scores on any of these subscales. Difficulty in the course of pregnancy was a significant positive predictor of nonspecific depression, and difficulty of delivery was a significant positive predictor of anxiety. Neither of these variables significantly predicted anhedonia. These results provide evidence of the heterogeneity of postpartum depression, indicating that risk factors differentially influence subscales of the EPDS.  相似文献   
898.
899.
The authors examined women's neuroendocrine stress responses associated with sexism. They predicted that, when being evaluated by a man, women who chronically perceive more sexism would experience more stress unless the situation contained overt cues that sexism would not occur. The authors measured stress as the end product of the primary stress system linked to social evaluative threat-the hypothalamic-pituitary-adrenal cortical axis. In Study 1, female participants were rejected by a male confederate in favor of another male for sexist reasons or in favor of another female for merit-based reasons. In Study 2, female participants interacted with a male confederate who they learned held sexist attitudes or whose attitudes were unknown. Participants with higher chronic perceptions of sexism had higher cortisol, unless the situation contained cues that sexism was not possible. These results illustrate the powerful interactive effects of chronic perceptions of sexism and situational cues on women's stress reactivity.  相似文献   
900.
Children's attitudes toward sex-role division in adult occupational roles   总被引:2,自引:0,他引:2  
Kindergarten, fifth-grade, and eleventh-grade participants from a working-class community were presented with a questionnaire of 44 adult occupations and activities. They indicated for each occupation who they thought should do the job: male, female, or either one. They also stated their own future occupational goals. Liberality, defined as the number of either responses, increased with age. There was a significant sex difference in the kindergarten, with the females more liberal than the males, but not in the other grade levels. Females named as many different potential adult occupations for themselves as did males. Males and females tended to name occupations traditionally considered appropriate for their own sex, with some tendency for females to also name traditional male occupations.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号