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   201篇
  免费   7篇
  2020年   6篇
  2018年   6篇
  2017年   2篇
  2016年   2篇
  2015年   5篇
  2014年   7篇
  2013年   22篇
  2012年   8篇
  2011年   5篇
  2010年   3篇
  2009年   3篇
  2008年   4篇
  2007年   8篇
  2006年   4篇
  2005年   11篇
  2004年   6篇
  2003年   10篇
  2002年   12篇
  2001年   2篇
  2000年   2篇
  1998年   3篇
  1997年   2篇
  1995年   3篇
  1994年   4篇
  1992年   1篇
  1991年   2篇
  1989年   5篇
  1988年   2篇
  1987年   3篇
  1986年   6篇
  1985年   2篇
  1984年   3篇
  1983年   4篇
  1982年   1篇
  1981年   1篇
  1980年   4篇
  1979年   1篇
  1978年   1篇
  1977年   3篇
  1976年   3篇
  1975年   1篇
  1974年   1篇
  1973年   4篇
  1972年   2篇
  1970年   2篇
  1969年   4篇
  1968年   4篇
  1967年   1篇
  1966年   2篇
  1964年   1篇
排序方式: 共有208条查询结果,搜索用时 15 毫秒
91.
Cognitive function may be influenced by education, socioeconomic status, sex, and health status. Furthermore, aging interacts with these factors to influence cognition and dementia risk in late life. Factors that may increase or decrease successful cognitive aging are of critical importance, particularly if they are modifiable. The purpose of this study was to determine if economic status in late life is associated with cognition independent of socioeconomic status in early life. Cross-sectional demographic, socioeconomic, and cognitive function data were obtained in 2592 older adults (average age 71.6 years) from the Center for Disease Control’s National Health and Nutrition Examination Survey (NHANES) and analyzed with linear regression modeling. Cognitive function, as measured with a test of processing speed, was significantly associated with poverty index scores after adjusting for educational attainment as an estimate of childhood socioeconomic status, ethnic background, age, health status, and sex (P < 0.001). Our findings suggest that current economic status is independently associated with cognitive function in adults over age 60 years.  相似文献   
92.
Previous research has connected exercise identity with obligatory exercise, yet to date no empirical studies have identified moderator variables of this association. The current study included participants of an athletic event (full marathon, n = 582; half marathon, n = 1,106; shorter distance, n = 733) who completed questionnaires about exercise behaviors, obligatory exercise, and internalization of both the thin-ideal and athletic-ideal body shapes. General linear model analyses were conducted to examine the exercise identity–obligatory exercise relationship; moderator variables included gender, internalization of the thin-ideal body shape, and internalization of the athletic-ideal body shape. After controlling for the effects of body mass index, age, and distance group, the three-way interaction of exercise identity, gender, and internalization of the athletic-ideal body shape predicted obligatory exercise. Findings suggest that women who report high identification with exercise and high value on having an athletic physique may be vulnerable to obligatory exercise.  相似文献   
93.
Spatial location memory has rarely been assessed in young children due to a scarcity of developmentally appropriate tests. This study sought to compare nonverbal learning and recall in children born extremely low birth weight (ELBW; <1000 g) and less than 33 gestational weeks (GW) with term-born children at early school age using a recently developed and adapted test. We administered a modification of the Hopkins Board to 210 children at age six; 84 born ELBW (35 born < 26 GW; 49 born 26–33 GW) and 126 term-born. Six measures were obtained: naming, trials-to-criterion, errors-to-criterion, delayed item recall, delayed location recall, and percent retention. After age correction, ELBW children had worse general cognition, item naming, delayed item recall, delayed location recall, and percent retention than term-born children. Delayed item recall and percent retention performances of ELBW children remained worse after correction for general cognition. ELBW groups (< 26 GW and 26–33 GW) groups performed worse than term-born children in naming and delayed item recall with chronological age as covariate. Those born before 26 GW, but not 26–33 GW, performed worse than term-born children in delayed location recall and percent retention. Differences remained significant after controlling for gender, maternal education, and delivery type. All three groups' performance declined from final learning trial to delayed location recall, with a decline greater for less than 26 GW than term-born children. Extreme prematurity (< 26 GW) and ELBW are significant risk factors for spatial location memory deficit. The modified Hopkins Board discriminated high-risk preterm and term-born children at early school age and appears to be a useful test to measure this rarely studied cognitive capacity.  相似文献   
94.
95.
96.
The purpose of this study was to investigate consumption patterns of gay‐oriented sexually explicit media (SEM) among men who have sex with men (MSM) in Norway, with a particular emphasis on a possible relationship between gay SEM consumption and HIV risk behavior. Participants included 529 MSM living in Norway recruited online to complete a SEM consumption and sexual risk survey. Of the 507 participants who responded to the all items measuring exposure to SEM, 19% reported unprotected anal intercourse with a casual partner (UAI) in last 90 days, and 14% reported having had sero‐discordant UAI. Among those with UAI experience, 23% reported receptive anal intercourse (R‐UAI) and 37% reported insertive anal intercourse (I‐UAI). SEM consumption was found to be significantly associated with sexual risk behaviors. Participants with increased consumption of bareback SEM reported higher odds of UAI and I‐UAI after adjusting for other factors using multivariable statistics. MSM who started using SEM at a later age reported lower odds of UAI and I‐UAI than MSM who started earlier. Future research should aim at understanding how MSM develop and maintain SEM preferences and the relationship between developmental and maintenance factors and HIV sexual risk behavior.  相似文献   
97.

Objective

The purpose of this study was to compare the coach–athlete interaction structures of two competitive youth synchronized swimming teams differentiated on the basis of level of success.

Design

This comparison was a pilot test of the state space grid (SSG) observational methodology (Hollenstein, 2007) in sport settings.

Method

Two teams (two head coaches and 17 athletes in total) were observed over five training sessions. Coach and athlete behaviour was coded continuously for the duration of each training session. Measures of coach–athlete interaction were derived from these coded behaviours and compared between teams.

Results

Results revealed significant differences between the teams on measures of interaction variability, behavioural content patterns, and the sequencing of coach behaviours. The more successful team was characterized by less variable, more patterned interactions between coaches and athletes. The sequencing of coach behaviours for the more successful team emphasized the pairing of technical correction and positive reinforcement.

Conclusions

The findings suggest that positive environments characterized by a deliberate pattern of coach–athlete interaction may be associated with youth sport settings producing more satisfied and successful athletes. These results support the utility of SSGs for the analysis of interpersonal interactions in sport and highlight the unique insights made available through use of this methodology.  相似文献   
98.
Psychological trauma in childhood has been shown to increase a variety of psychological disturbances and psychiatric disorders. Although evidence-based treatments for children who have been traumatized exist, they are infrequently used by clinicians treating children. The present paper describes the creation of the Treatment Collaborative for Traumatized Youth (TCTY) which is a statewide partnership in North Dakota designed to disseminate efficacious treatments for traumatized children and monitor outcomes across a broad, rural, geographic expanse. The paper reviews the dissemination strategy developed by the TCTY, reports outcomes regarding both clinicians and child participants, and highlights problems identified in the project and solutions that were generated.  相似文献   
99.
Increasing evidence suggests that anxiety sensitivity (AS) may be a premorbid risk factor for the development of anxiety pathology. Perceived control and predictability have also been implicated as factors relevant to the genesis of anxiety. The principal aim of this study was to extend this work to examine independent and interactive effects of perceived control, predictability, and AS in the pathogenesis of panic. A large nonclinical sample of young adults (N = 1296) was prospectively followed over a 5- week highly stressful period of time (i.e., military basic training). Perceived control and predictability did not independently predict panic. However, there was evidence suggesting that AS interacted with perceived control such that high perceived control regarding basic training was protective against panic for individuals with high AS. Similarly, high perceived predictability during basic training reduced anxiety symptoms for individuals with high AS.  相似文献   
100.
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