全文获取类型
收费全文 | 942篇 |
免费 | 60篇 |
专业分类
1002篇 |
出版年
2024年 | 3篇 |
2023年 | 10篇 |
2022年 | 3篇 |
2021年 | 12篇 |
2020年 | 26篇 |
2019年 | 26篇 |
2018年 | 29篇 |
2017年 | 28篇 |
2016年 | 44篇 |
2015年 | 25篇 |
2014年 | 33篇 |
2013年 | 142篇 |
2012年 | 51篇 |
2011年 | 51篇 |
2010年 | 40篇 |
2009年 | 42篇 |
2008年 | 46篇 |
2007年 | 52篇 |
2006年 | 30篇 |
2005年 | 35篇 |
2004年 | 41篇 |
2003年 | 32篇 |
2002年 | 32篇 |
2001年 | 14篇 |
2000年 | 17篇 |
1999年 | 15篇 |
1998年 | 7篇 |
1997年 | 8篇 |
1996年 | 8篇 |
1995年 | 8篇 |
1994年 | 3篇 |
1993年 | 6篇 |
1992年 | 10篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1989年 | 8篇 |
1988年 | 3篇 |
1987年 | 2篇 |
1986年 | 7篇 |
1985年 | 9篇 |
1984年 | 6篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 3篇 |
1978年 | 4篇 |
1976年 | 2篇 |
1974年 | 3篇 |
1973年 | 4篇 |
1971年 | 4篇 |
排序方式: 共有1002条查询结果,搜索用时 15 毫秒
121.
Induction of orientation-selective colour aftereffects (the McCollough effect) was studied with groups of young children who differed in their ability to discriminate an oblique grating from its mirror-image under recognition conditions. If the McCollough effect is generated through associative learning, children who failed to learn simple identifying responses to oblique lines as a function of the direction in which the lines point should also fail to associate colour lablels selectively to these same stimuli. Instead, the ease with which the McCollough effect was induced by alternate exposure to left-oblique lines in green light and right-oblique lines in red light was independent of the ability of the young child to discriminate direction of line under recognition conditions. 相似文献
122.
Data from 7 studies were aggregated to examine how reported sexual arousal and alcohol intoxication interact to affect attitudes and intentions toward engaging in unprotected sexual intercourse in college-age men (N = 358). When participants were in a sober or placebo condition, their self-reports of sexual arousal had no effect on their responses. When participants were intoxicated, however, those who felt sexually aroused reported more favorable attitudes, thoughts, and intentions toward having unprotected sex than did those who did not feel aroused. These findings support alcohol myopia theory (C. M. Steele & R. A. Josephs, 1990), which states that alcohol intoxication restricts attentional capacity so that people are highly influenced by the most salient cues in their environment. It is suggested that sexual arousal is a powerful internal cue that interacts with alcohol intoxication to enhance attitudes and intentions toward risky sexual behaviors. 相似文献
123.
124.
This study investigated the shared and distinct associations between depressive and anxious symptoms and motives for pursuing personal goals. One hundred and thirty-six undergraduates generated approach and avoidance goals and rated each on intrinsic, identified, introjected and external motives. Anxious and depressive symptoms showed significant unique associations with distinct motives. Specifically, depressive symptoms predicted significant unique variance in intrinsic motivation for approach goals (but not avoidance goals), whereas anxious symptoms predicted significant unique variance in introjected regulation for approach and avoidance goals. Some of these findings were moderated by gender. The findings broadly support the notion that depression is uniquely characterised by reduced enjoyment of approach goal pursuit whereas anxiety is uniquely characterised by pursuit of goals in order to avoid negative outcomes. We suggest that these findings are compatible with regulatory focus theory and suggest that motives for goal pursuit are important in understanding the relation between goals and specific mood disorder symptoms. 相似文献
125.
Alison D’anglejan W. E. Lambert G. R. Tucker J. H. Greenberg 《Attention, perception & psychophysics》1971,9(3):356-357
Six samples of CCVC phoneme sequences were devised to represent linguistically specifiable distances from existing French words, distance being measured in terms of number of substitutions needed to make an existing French word. Fifty-four native speakers of French rated the sound sequences for their subjective proximity to French, using ungraded rating scales. Results showed a general correspondence between the linguistic and psychological measurements, although certain phoneme sequences did not follow the predicted order. These were examined to see if their displacement could be attributed to the number of different French words reached through substitutions. 相似文献
126.
127.
128.
Sarah Predham Sara Hamilton Alison M. Elliott William T. Gibson 《Journal of genetic counseling》2016,25(1):25-31
We report the case of a woman who pursued direct access genetic testing and then presented with concerns regarding a positive test result for Long-QT syndrome. Although the result ultimately proved to be a false positive, this case illustrates that costs associated with follow-up of direct access genetic testing results can be non-trivial for both the patient and for health care systems. Here we raise policy questions regarding the appropriate distribution of these costs. We also discuss the possibility that, when confronted by a direct access genetic test result that reports high risk for one or more actionable diseases, a family physician might feel compelled to act out of a desire to avoid liability, even when information regarding the accuracy and validity of the testing were not easily accessible. This case outlines lessons that can easily be translated into clinical practice, not only by genetic counselors, but also by family physicians, medical specialists and members of the public. 相似文献
129.
William A. Roberts Nicole A. Guitar Heidi L. Marsh Hayden MacDonald 《Animal cognition》2016,19(3):593-604
The interaction of working and reference memory was studied in rats on an eight-arm radial maze. In two experiments, rats were trained to perform working memory and reference memory tasks. On working memory trials, they were allowed to enter four randomly chosen arms for reward in a study phase and then had to choose the unentered arms for reward in a test phase. On reference memory trials, they had to learn to visit the same four arms on the maze on every trial for reward. Retention was tested on working memory trials in which the interval between the study and test phase was 15 s, 15 min, or 30 min. At each retention interval, tests were performed in which the correct WM arms were either congruent or incongruent with the correct RM arms. Both experiments showed that congruency interacted with retention interval, yielding more forgetting at 30 min on incongruent trials than on congruent trials. The effect of reference memory strength on the congruency effect was examined in Experiment 1, and the effect of associating different contexts with working and reference memory on the congruency effect was studied in Experiment 2. 相似文献
130.
Diverging Paths: Understanding Racial Differences in Civic Engagement Among White,African American,and Latina/o Adolescents Using Structural Equation Modeling 下载免费PDF全文
Joshua Littenberg‐Tobias Alison K. Cohen 《American journal of community psychology》2016,57(1-2):102-117
There is increasing concern about the large civic engagement gap between Whites and Latina/o and African American youth. Some suggest this may be because traditional models and measures of civic engagement may not be as applicable for youth from historically marginalized groups. With an urban sample of middle and high school‐age youth (n = 903, 52% female), we used structural equation modeling to identify differences in civic pathways between youth from different racial/ethnic backgrounds. We found significant differences between groups including much stronger relationships between exposure to democratic practices and civic self‐efficacy and knowledge for African American and Latina/o youth than for White youth and a stronger relationship between civic knowledge and future civic engagement for Whites and Latina/os than for African Americans. These findings suggest that educators and researchers interested need to take into account the diversity of youths' racial experiences when examining youth civic development. 相似文献