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   569篇
  免费   31篇
  600篇
  2024年   3篇
  2023年   5篇
  2022年   6篇
  2021年   4篇
  2020年   15篇
  2019年   17篇
  2018年   23篇
  2017年   22篇
  2016年   35篇
  2015年   11篇
  2014年   23篇
  2013年   65篇
  2012年   38篇
  2011年   31篇
  2010年   11篇
  2009年   20篇
  2008年   19篇
  2007年   27篇
  2006年   26篇
  2005年   28篇
  2004年   20篇
  2003年   29篇
  2002年   23篇
  2001年   10篇
  2000年   7篇
  1999年   9篇
  1998年   10篇
  1997年   6篇
  1996年   4篇
  1995年   6篇
  1994年   5篇
  1993年   3篇
  1992年   6篇
  1991年   6篇
  1989年   2篇
  1987年   2篇
  1983年   2篇
  1982年   1篇
  1981年   3篇
  1980年   2篇
  1979年   6篇
  1978年   1篇
  1977年   2篇
  1976年   3篇
  1974年   2篇
  1973年   1篇
排序方式: 共有600条查询结果,搜索用时 15 毫秒
551.
How objects are held determines how they are seen, and may thereby play an important developmental role in building visual object representations. Previous research suggests that toddlers, like adults, show themselves a disproportionate number of planar object views – that is, views in which the objects' axes of elongation are perpendicular or parallel to the line of sight. Here, three experiments address three explanations of this bias: (1) that the locations of interesting features of objects determine how they are held and thus how they are viewed; (2) that ease of holding determines object views; and (3) that there is a visual bias for planar views that exists independently of holding and of interesting surface properties. Children 18 to 24 months of age manually and visually explored novel objects (1) with interesting features centered in planar or ¾ views; (2) positioned inside Plexiglas boxes so that holding biased either planar or non‐planar views; and (3) positioned inside Plexiglas spheres, so that no object properties directly influenced holding. Results indicate a visual bias for planar views that is influenced by interesting surface properties and ease of holding, but that continues to exist even when these factors push for alternative views.  相似文献   
552.
As part of a larger project designed to inform prevention and treatment of postpartum depression and promote positive mother–child relationships in diverse families, this study describes personal stories of postnatal adjustment from 14 White and 9 Hispanic women recruited from prenatal care clinics. Qualitative interviews conducted in the mothers’ primary language (English or Spanish) were analyzed using a modified grounded theory content‐analysis approach. The coding scheme developed to capture the women's discourse about their experiences included child temperament and health; intergenerational patterns; work demands and job loss; schedule changes; increased responsibilities; difficulties with parenting tasks; emotional distress; social stressors and resources; coping strategies; and changes in work, personal, social, and marital domains. More White mothers than Hispanic mothers reported changes in time structure, work stressors, use of psychotropic medication, informational support, and social support from other mothers and professionals; however, within‐group differences were more evident than were cross‐group ethnic differences. Analyses of qualitative interviews led to the integration of Belsky's Determinants of Parenting Model (1984) and the Double ABCX Model of Family Adjustment and Adaptation (McCubbin & Patterson, 1983) into a hybrid third theoretical framework.  相似文献   
553.
Physical activity declines across the adult life span despite the well-established links between physical activity and health-related, psychological, cognitive, and social benefits. We contrasted the beliefs young and older adults hold about how aging affects both physical abilities and physical activity and determined whether older adults’ beliefs about physical aging relate to their engagement in physical activity. Using visual rating scales, 56 young and 49 community-dwelling older adults indicated the extent to which a typical woman or typical man aged 20–90 possesses six different physical abilities and engages in three different types of physical activity. Stereotypes of physical aging were ability- and activity-specific, and older adults endorsed more positive views than their younger peers. Stereotypical beliefs predicted older adults’ engagement in moderate-intensity activity. This study offers intriguing avenues for future research and suggests that better understanding physical aging stereotypes may contribute toward designing interventions that promote lifelong physical activity.  相似文献   
554.
With the advent of widespread genomic testing for diagnostic indications and disease risk assessment, there is increased need to optimize genetic counseling services to support the scalable delivery of precision medicine. Here, we describe how we operationalized the reciprocal engagement model of genetic counseling practice to develop a framework of counseling components and strategies for the delivery of genomic results. This framework was constructed based upon qualitative research with patients receiving genomic counseling following online receipt of potentially actionable complex disease and pharmacogenomics reports. Consultation with a transdisciplinary group of investigators, including practicing genetic counselors, was sought to ensure broad scope and applicability of these strategies for use with any large-scale genomic testing effort. We preserve the provision of pre-test education and informed consent as established in Mendelian/single-gene disease genetic counseling practice. Following receipt of genomic results, patients are afforded the opportunity to tailor the counseling agenda by selecting the specific test results they wish to discuss, specifying questions for discussion, and indicating their preference for counseling modality. The genetic counselor uses these patient preferences to set the genomic counseling session and to personalize result communication and risk reduction recommendations. Tailored visual aids and result summary reports divide areas of risk (genetic variant, family history, lifestyle) for each disease to facilitate discussion of multiple disease risks. Post-counseling, session summary reports are actively routed to both the patient and their physician team to encourage review and follow-up. Given the breadth of genomic information potentially resulting from genomic testing, this framework is put forth as a starting point to meet the need for scalable genetic counseling services in the delivery of precision medicine.  相似文献   
555.
The current study evaluated a screening procedure for multiple topographies of problem behavior in the context of an ongoing functional analysis. Experimenters analyzed the function of a topography of primary concern while collecting data on topographies of secondary concern. We used visual analysis to predict the function of secondary topographies and a subsequent functional analysis to test those predictions. Results showed that a general function was accurately predicted for five of six (83%) secondary topographies. A specific function was predicted and supported for a subset of these topographies. The experimenters discuss the implication of these results for clinicians who have limited time for functional assessment.  相似文献   
556.
The present study examined the relationships among gender, causal attributions for success, and the distribution of organizational rewards. In this study, which attempted to control for methodological deficiencies of previous research, male and female undergraduates reviewed the performance of four stimulus managers: three men and one woman. Participants were asked to make causal attributions for the stimulus manager's success, and to rate how effectively they believed the manager would perform in the future. They were then asked to nominate a manager for an organizational reward. Bias against the female manager was exhibited by females only. Results indicated that lower expectations of future performance for the female manager significantly predicted the bias against her in reward allocation.  相似文献   
557.
A study of records for 1 large U.S. company revealed that employees with positive drug screens were fired, whereas workers who self‐disclosed drug/alcohol problems remained employed. Both groups were offered substance abuse intervention, and some previously fired workers were rehired after they received treatment. Accident results showed that drug‐test positive employees, as compared with self‐referred workers, had a significantly higher accident rate in all categories. Treatment data revealed that drug‐test positive workers had significantly higher accident rates before and after treatment than self‐referred employees. Posttreatment results showed that drug‐test positive employees had a significant decrease in accidents after services, whereas the self‐referred group showed no change.  相似文献   
558.
Two studies were conducted to identify the informational bases of food attitudes. Study 1 was an exploratory study in which participants indicated the importance of food characteristics and emotional reactions for determining their attitudes toward a variety of foods. On the basis of a series of exploratory factor analyses, 5 informational bases of food attitudes were identified: positive affect, negative affect, specific sensory qualities, abstract cognitive qualities, and general sensory qualities. A second confirmatory study corroborated the appropriateness of this 5‐factor structure. Furthermore, the food‐specific attitude structure model was found to have better fit than a more traditional attitude structure model. The implications of these findings for attitude theory, understanding eating behavior, and changing food selection are discussed.  相似文献   
559.
Tend and Befriend: Biobehavioral Bases of Affiliation Under Stress   总被引:1,自引:0,他引:1  
ABSTRACT— In addition to fight-or-flight, humans demonstrate tending and befriending responses to stress—responses underpinned by the hormone oxytocin, by opioids, and by dopaminergic pathways. A working model of affiliation under stress suggests that oxytocin may be a biomarker of social distress that accompanies gaps or problems with social relationships and that may provide an impetus for affiliation. Oxytocin is implicated in the seeking of affiliative contact in response to stress, and, in conjunction with opioids, it also modulates stress responses. Specifically, in conjunction with positive affiliative contacts, oxytocin attenuates psychological and biological stress responses, but in conjunction with hostile and unsupportive contacts, oxytocin may exacerbate psychological and biological stress responses. Although significant paradoxes remain to be resolved, a mechanism that may underlie oxytocin's relation to the health benefits of social support may be in view.  相似文献   
560.
Classic cognitive theory conceptualizes executive functions as involving multiple specific domains, including initiation, inhibition, working memory, flexibility, planning, and vigilance. Lesion and neuroimaging experiments over the past two decades have suggested that both common and unique processes contribute to executive functions during higher cognition. It has been suggested that a superordinate fronto–cingulo–parietal network supporting cognitive control may also underlie a range of distinct executive functions. To test this hypothesis in the largest sample to date, we used quantitative meta-analytic methods to analyze 193 functional neuroimaging studies of 2,832 healthy individuals, ages 18–60, in which performance on executive function measures was contrasted with an active control condition. A common pattern of activation was observed in the prefrontal, dorsal anterior cingulate, and parietal cortices across executive function domains, supporting the idea that executive functions are supported by a superordinate cognitive control network. However, domain-specific analyses showed some variation in the recruitment of anterior prefrontal cortex, anterior and midcingulate regions, and unique subcortical regions such as the basal ganglia and cerebellum. These results are consistent with the existence of a superordinate cognitive control network in the brain, involving dorsolateral prefrontal, anterior cingulate, and parietal cortices, that supports a broad range of executive functions.  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