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   516篇
  免费   12篇
  528篇
  2022年   6篇
  2021年   4篇
  2020年   8篇
  2019年   7篇
  2018年   17篇
  2017年   11篇
  2016年   11篇
  2015年   7篇
  2014年   10篇
  2013年   74篇
  2012年   18篇
  2011年   12篇
  2010年   15篇
  2009年   7篇
  2008年   15篇
  2007年   19篇
  2006年   16篇
  2005年   12篇
  2004年   11篇
  2003年   18篇
  2002年   15篇
  2001年   10篇
  2000年   7篇
  1999年   8篇
  1998年   8篇
  1997年   5篇
  1996年   6篇
  1994年   7篇
  1993年   5篇
  1992年   8篇
  1991年   8篇
  1990年   3篇
  1989年   5篇
  1988年   7篇
  1987年   8篇
  1986年   8篇
  1985年   4篇
  1984年   9篇
  1983年   9篇
  1982年   11篇
  1981年   9篇
  1980年   12篇
  1979年   5篇
  1978年   6篇
  1977年   9篇
  1976年   6篇
  1974年   3篇
  1968年   4篇
  1967年   3篇
  1955年   3篇
排序方式: 共有528条查询结果,搜索用时 0 毫秒
131.
    
This article reports the development and exploratory testing of a school-based intervention programme designed to enhance levels of physical activity in adolescents. The intervention is based on social cognitive theory (SCT), self-regulation theory (SRT) and planning as evidence-based mediators of physical activity changes. Two classes, paired on socio-economic variables, were selected from each of eight Portuguese schools and randomly assigned to an intervention or control group (N = 291). Primary outcome was ‘moderate to vigorous physical activity’ (International Physical Activity Questionnaire) measured pre and post intervention and at three and nine months follow-up. SCT, SRT and planning variables were secondary outcomes measured pre and post intervention. At post test, participants in the intervention group reported 18 min per week more physical activity (PA), adjusted for pre-intervention, age and sex, than those in the control group (95% confidence interval ?10 to 46; p = 0.249). This difference increased to 33 min (95% CI–4 to 71; p = 0.082) at three months and to 57 min (95% CI 13 to 101, p = 0.008) at nine month follow-up. Moreover, the intervention resulted in changes of some of the theoretical target variables, including outcome expectancies and coping planning. However, no evidence was found for the changes in theoretical moderators to mediate the intervention effects on behaviour. Implications for theory and for future research are discussed.  相似文献   
132.
Anxiety and depression are often comorbid with Autism Spectrum Disorder (ASD). There is empirical support to suggest that cognitive-behavioral therapy (CBT) is an efficacious treatment for comorbid anxiety disorders in youth with ASD. Modifications to CBT for youths with ASD have been made with emphasis on exposure being a critical component. Few studies have evaluated the efficacy of CBT on symptoms of depression in youths with ASD. Modifications to CBT will be outlined in this review, as will implementation suggestions for the clinician practicing CBT with ASD youth. Limitations of the studies investigating this intervention include small sample sizes, clinician- and parent-report of symptom change but not consistent self-identified change, limited validated tools for assessing change, and lack of long-term follow-up.  相似文献   
133.
Although Asian Indians represent one the fastest growing demographics in the United States, no studies exist on the sexual behavior of Asian Indian youth or its association with acculturation. Previous research has demonstrated a link between earlier sexual initiation and subsequent sexual risk and the role of acculturation and sexual initiation in other Asian groups. The present exploratory study examined gender and acculturation with regard to sexual initiation in Asian Indians (n = 37). Results reveal no significant gender differences in sexual initiation and total acculturation scores. Gender differences did emerge for the association among sexual behaviors and the influence of specific areas of acculturation on sexual initiation. Findings suggest that gender and acculturation may be important variables in understanding sexual behavior but that current acculturation measures may be insufficient to adequately assess acculturation levels of Asian Indian youth. Future research should focus on Asian Indians as an understudied minority group.  相似文献   
134.
135.
This experiment tested the social reward potential of self-disclosure and its impact on a receiver's attraction towards the sender. Further, a sender self-perception effect was tested. Just as a receiver is speculated to use the intimacy level of a disclosure as an indication of sender regard and trust, the self-perception hypothesis maintains that the sender also uses intimacy level to self-attribute liking and trust for the receiver. A forced-compliance procedure with college males was used to have a sender subject send either a high or low intimacy self-disclosure essay. Consistent with the social reward and self-perception hypotheses were measures of sender's behavior as trusting and measures of feelings during the disclosure process. General measures of liking and trust were not successful, however.  相似文献   
136.
As public attitude research evolves, often becoming more complex and variable, we are coming to understand that public attitudes are also more complex and variable than can often be captured by a single opinion poll, and more sophisticated forms of analyses are needed that look not just at a breadth of attitudes, but at a breadth of publics. The Australian Department of Industry undertook a public attitude study in 2012 that was not only longitudinal, looking at changes in attitudes towards nanotechnologies, but also looking at the values or worldviews that influence attitudes. The findings allowed for a segmentation of the public, into four key segments, with distinct homogenous attitudes. This allows for not just a deeper understanding of the diversity of views that exist and the worldviews that influence them, but challenges engagement practitioners to ensure they have a broad representation of participants with different attitudes and do not favour one or two segments only.  相似文献   
137.
138.
The psychological construct of general mental ability (GMA), introduced by C. Spearman (1904) nearly 100 years ago, has enjoyed a resurgence of interest and attention in recent decades. This article presents the research evidence that GMA predicts both occupational level attained and performance within one's chosen occupation and does so better than any other ability, trait, or disposition and better than job experience. The sizes of these relationships with GMA are also larger than most found in psychological research. Evidence is presented that weighted combinations of specific aptitudes tailored to individual jobs do not predict job performance better than GMA alone, disconfirming specific aptitude theory. A theory of job performance is described that explicates the central role of GMA in the world of work. These findings support Spearman's proposition that GMA is of critical importance in human affairs.  相似文献   
139.
The ways in which children appraise and cope with school bullying are likely to influence the long-term outcomes experienced. To examine this possibility, 219 Spanish undergraduate students (73 male, 146 female) aged between 18 and 40, completed an adapted version of the Retrospective Bullying Questionnaire (RBQ; Sch?fer et al., 2004) and a distress scale (Rivers, 1999). Results indicated that neither coping strategies reported by victims of bullying nor the match between control appraisal and coping strategy influenced levels of distress experienced as adults. Control, threat and challenge appraisals did, however, influence long-term distress. Explanations for these effects are discussed, and include the possibility that appraisals may directly influence levels of distress and the quality of emotions experienced by victims during the actual bullying episode. Active strategies were perceived by students to be effective in dealing with bullying, whereas those centered on avoiding the conflict, or which involved aggression, were considered ineffective.  相似文献   
140.
The study of learning and memory using the chicken model has relied on three learning paradigms, passive avoidance learning, imprinting and the pebble floor task. Passive avoidance learning and imprinting have been used predominantly in very young chickens and cannot be used to access learning and memory in older chickens. We have established a new behavioural learning paradigm, Discriminative Taste Aversion Learning (DTAL), that can be used with both young and older animals. The task requires chickens to discriminate between food crumbs dyed either red or yellow with one colour being associated with the aversive tasting substance, methylanthranilate. Learning can be tested at various times after the training session by presenting chickens with the coloured food crumbs without an aversive taste. Both chickens tested at 5 and 15 days post-hatch learned to avoid the aversive crumbs. Furthermore, the protein synthesis inhibitor anisomycin (30 mM; 10 microl per hemisphere) injected into the intermediate medial hyperstriatum ventrale 15 min pre-training or 45 min post-training blocked long-term memory for the DTAL task when tested 24 h later. Memory for the task was unaffected by anisomycin injection 120 min post-training or in control animals injected with saline at similar times. The timing of the cellular processes of protein synthesis needed for consolidation of the DTAL appears to be similar to those described for the other behavioural paradigms in young chickens.  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