全文获取类型
收费全文 | 39592篇 |
免费 | 833篇 |
国内免费 | 7篇 |
专业分类
40432篇 |
出版年
2020年 | 493篇 |
2019年 | 476篇 |
2018年 | 773篇 |
2017年 | 686篇 |
2016年 | 766篇 |
2015年 | 540篇 |
2014年 | 715篇 |
2013年 | 2886篇 |
2012年 | 1239篇 |
2011年 | 1219篇 |
2010年 | 750篇 |
2009年 | 794篇 |
2008年 | 1086篇 |
2007年 | 1119篇 |
2006年 | 966篇 |
2005年 | 881篇 |
2004年 | 813篇 |
2003年 | 745篇 |
2002年 | 742篇 |
2001年 | 1428篇 |
2000年 | 1401篇 |
1999年 | 1029篇 |
1998年 | 415篇 |
1997年 | 392篇 |
1996年 | 357篇 |
1992年 | 811篇 |
1991年 | 737篇 |
1990年 | 839篇 |
1989年 | 702篇 |
1988年 | 652篇 |
1987年 | 635篇 |
1986年 | 639篇 |
1985年 | 692篇 |
1984年 | 568篇 |
1983年 | 490篇 |
1982年 | 374篇 |
1979年 | 546篇 |
1978年 | 426篇 |
1977年 | 349篇 |
1976年 | 336篇 |
1975年 | 491篇 |
1974年 | 564篇 |
1973年 | 574篇 |
1972年 | 458篇 |
1971年 | 424篇 |
1970年 | 361篇 |
1969年 | 396篇 |
1968年 | 499篇 |
1967年 | 439篇 |
1966年 | 432篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Young children experience difficulties establishing conceptual representations of color compared with everyday objects. We argue that comparing the development of color cognition to that of familiar objects is inappropriate since color is a perceptual attribute that can be abstracted from an object and by itself lacks functional significance. Instead, we compared the recognition, perceptual saliency, and naming of color to that of three other perceptual object attributes (motion, form, and size) in 47 children aged 2 to 5 years as a function of language age. Results revealed that, although color was perceptually salient relative to the other visual attributes, no selective impairment to color cognition (recognition and naming) was found relative to the three other visual attributes tested. Thus, when the appropriate comparisons are made, we find no special delay in the development of color conceptualization. Furthermore, the striking disparity between perceptual saliency and cognition of color in our youngest age groups suggests that perceptual saliency has little influence on the conceptual development of color. 相似文献
992.
Participants were asked to generate a single sequence of numbers in between two bounds. By varying the requested sequence length and way in which the question is posed, this paradigm enables assessment of the contributions to central executive functioning of schema, focus of attention, and load. With sequences of three or four numbers, a quarter of the sample failed fully to comply with the instructions. They generated an incorrect number of numbers or went outside the specified bounds. With sequences of six numbers, more than half of the sample infringed one or more of the constraints. Participants consistently generated sequences with particular generic properties. The overall frequency and patterns of infringements suggest that a substantial proportion of participants focused their conceptual attention on sequence content and often neglected the problem of how thelength and boundary constraints were going to be evaluated either before or during response delivery. 相似文献
993.
Zeddies TJ 《American journal of psychoanalysis》2001,61(3):217-238
One of the relics of positivism has been an underappreciation of the moral and ethical dimensions of psychoanalytic theory and practice. In a positivist metapsychology, cure and therapeutic gain were often defined instrumentally, with relatively little consideration given to aspects of human experience (e.g., moral, cultural, spiritual) that did not fit within a positivist framework. Conceptual and paradigmatic shifts in psychoanalysis have occurred, in part, because of the inability of the classical model to provide a language that adequately captures deeply felt human values and beliefs. Aided by hermeneutic and postmodern influences, many contemporary psychoanalytic theories are beginning to focus greater attention on the notion that analytic therapy is empowered by a set of ethical convictions, beliefs, and commitments, which are tied to a certain understanding of the good life. Along these lines, the author argues that developing a fresh understanding of the moral and ethical dimensions of psychoanalysis requires elaborating a new ontology of human subjectivity and social life. The author offers a sketch of how this gargantuan task might be started by integrating psychoanalysis within a hermeneutic perspective on dialogue, by suggesting that it would be helpful to view psychoanalysis as promoting Aristotelian practical wisdom or phronesis, and by rethinking psychoanalytic theory and interpretation as a form of practice. 相似文献
994.
This study evaluated the effects of three popular physical activities on the psychological well-being of university students. 44 students in three physical activity classes enrolled in the Fitness for Life Program at Montana State University which included circuit training, weight training, and racquetball were administered the Profile of Mood States scale 5 min. before and 5 min. after one bout of physical activity. Two of the three activities appeared to be associated positively with scores on certain subscales. The results supported positive psychological well-being of students after physical activity. Implications for research are presented. 相似文献
995.
Recent attempts to validate the Psychopathy Checklist-Revised (PCL-R) as a measure of psychopathy in female offenders have been limited by a failure to examine laboratory correlates of the syndrome. We assessed 112 incarcerated women by using the PCL-R and examined their performance on a card perseveration task that has been used to demonstrate response perseveration in psychopathic men. Contrary to prediction, psychopathic women did not perseverate responding when the PCL-R was used either dimensionally or categorically. The authors discuss the implications of the results for the PCL-R and for female psychopathy more generally. 相似文献
996.
241 African-American college students (94 men and 147 women, mean age = 20.3 +/- 3.4 yr.) completed the 1994 Disgust Scale of Haidt, McCauley, and Rozin and a modified form of Parisi-Rizzo's 1987 Attitudes Toward Organ Donation Scale (negative subscale only) as well as a behavioral measure of intention to donate organs after death. Analyses indicated that the higher the disgust sensitivity, the more negative the attitude toward organ donation and the less likely the student was to indicate intent to donate organs. It was further shown that negative attitudes toward organ donation mediated the relationship between disgust sensitivity and the behavioral intention measure. Results highlight the complexity of the issues surrounding organ donation within an African-American population and provide additional empirical evidence for the development of a theoretical model to explain the organ donation phenomenon. 相似文献
997.
Turnover and organizational performance: a comparative analysis of the effects of voluntary, involuntary, and reduction-in-force turnover. 总被引:1,自引:0,他引:1
Data were collected from 31 regional subunits of a national financial services company to examine differential effects of 3 types of turnover (voluntary, involuntary, and reduction-in-force) on measures of organizational subunit performance. Although each form of turnover exhibited adverse effects on subunit performance when examined separately, partial correlation results revealed greater and more pervasive adverse effects for reduction-in-force turnover (i.e., downsizing) in comparison with the effects of voluntary and involuntary turnover. The results confirm the negative effects of downsizing, suggesting the need to move beyond the traditional voluntary-involuntary classification scheme used in turnover research. 相似文献
998.
The representation of serial killers was examined from the analysis of 317 Web pages in the Italian language to study how the psychological profiles of serial killers are described on the Italian Internet. The correspondence analysis of the content of these Web pages shows that in Italy the serial killer is associated with words such as "monster" and "horror," which suggest and imply psychological perversion and aberrant acts. These traits are peculiar for the Italian scenario. 相似文献
999.
Categorical perception of facial expressions is studied in high-functioning adolescents with autism, using three continua of facial expressions obtained by morphing. In contrast to the results of normal adults, the performance on the identification task in autistic subjects did not predict performance on the discrimination task, an indication that autistic individuals do not perceive facial expressions categorically. Performance of autistic subjects with low social intelligence was more impaired than that of subjects with higher social IQ scores on the expression recognition of unmanipulated photographs. It is suggested that autistic subjects with higher social intelligence may use compensatory strategies that they have acquired in social training programs This may camouflage the deficits of this subgroup in the perception of facial expressions. 相似文献
1000.