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   28398篇
  免费   1181篇
  国内免费   10篇
  2020年   340篇
  2019年   469篇
  2018年   595篇
  2017年   532篇
  2016年   645篇
  2015年   416篇
  2014年   587篇
  2013年   2612篇
  2012年   996篇
  2011年   1039篇
  2010年   700篇
  2009年   728篇
  2008年   995篇
  2007年   1004篇
  2006年   919篇
  2005年   775篇
  2004年   841篇
  2003年   763篇
  2002年   741篇
  2001年   652篇
  2000年   717篇
  1999年   540篇
  1998年   409篇
  1997年   322篇
  1996年   283篇
  1995年   318篇
  1994年   301篇
  1993年   275篇
  1992年   413篇
  1991年   413篇
  1990年   413篇
  1989年   386篇
  1988年   389篇
  1987年   352篇
  1986年   339篇
  1985年   366篇
  1984年   318篇
  1983年   304篇
  1982年   274篇
  1981年   260篇
  1980年   264篇
  1979年   358篇
  1978年   324篇
  1975年   285篇
  1974年   320篇
  1973年   326篇
  1972年   269篇
  1971年   251篇
  1968年   268篇
  1967年   257篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
881.
Based on the construct of classical IQ (mental age/chronological age), a model of the proportions of the population at various stages of cognitive development as a function of age is proposed. The model, which accounts well for empirical data for the age range 13 through 17 years, is shown to compare favorably with other theoretical models. The success of the model provides further evidence of the salience of the construct of general cognitive capacity in differential psychology.  相似文献   
882.
Careers guidance in the knowledge society   总被引:1,自引:0,他引:1  
In modern society individuals are becoming responsible for their own work allocation. They have to acquire so-called 'actor competences'. They have to learn to form their own identity, to determine a direction and to plan a career. However, the individual's shortage of actor competences confronts him or her with many problems; several institutions risk becoming overburdened by allocation or career problems. As a result, the role of the career counsellor must change from that of a ferryman to that of a pathfinder.  相似文献   
883.
This study tested predictions concerning the associations between children's nonparental care experiences and emotion regulation. It involved 53 participants (21 girls and 32 boys) of preschool age and their mothers. The children's care experiences ranged from those who were raised exclusively at home to those who had nonparental care experience beginning in early infancy. The participants were observed in a laboratory playroom, and their mothers were asked to complete questionnaires regarding their children's care histories and their current care situations. The children with extensive nonparental care backgrounds were found to be more likely to use self-directed emotion regulation behaviors when faced with a mildly frustrating situation. In the same situation, the children who had experienced minimal nonparental care were found to be more likely to use other-directed emotion regulation behaviors. Additionally, the children who had experienced care settings with large numbers of children in each care group or who had experienced many caregiver changes were more likely to use self-directed emotion regulation behaviors, whereas those who had experienced settings with smaller care groups and fewer caregiver changes were more likely to use other-directed emotion regulation behaviors.  相似文献   
884.
This is the first study to examine the relations between components of masculine gender role conflict and specific symptoms of psychological distress in a sample of men seeking counseling services. One hundred and thirty male clients from 2 university counseling centers completed the Gender Role Conflict Scale and the Symptom Checklist-90-Revised. Participants reported moderate to high levels of psychological symptoms, which were correlated with components of masculine role conflict. Results of simultaneous multiple regressions supported previous findings in nonclinical samples of relations between masculine role conflict and depression and interpersonal issues. In addition, masculine role conflict significantly predicted paranoia, psychoticism, and obsessive compulsivity. Implications for counseling and future research are discussed.  相似文献   
885.
Mental models of the earth, sun, and moon: Indian children's cosmologies   总被引:1,自引:0,他引:1  
This study reports data on the acquisition of knowledge about astronomy in children from India. Based on prior research, we hypothesized that the cosmological models that children construct are influenced by both first-order and second-order constraints on knowledge acquisition. First-order constraints are the implicit assumptions that govern the construction of initial cosmological models. Examples of such constraints include the assumptions that the earth is flat and supported. Such first-order constraints are presumed to be universal. Second-order constraints arise from the specific properties ascribed to cosmological objects. For example, representations of the earth's shape and location relative to the sun and moon constrain the kinds of mechanisms that are generated to account for the day-night cycle. We hypothesized that in cultures where both folk cosmologies and the scientific cosmological model are accessible to children, aspects of folk models are likely to be incorporated in children's cosmologies if they provide a psychologically easier way of satisfying first-order constraints. This hypothesis is supported by our findings with regard to universality and culture specificity in children's cosmologies. Indian children's cosmologies honor a variety of universal first-order constraints. These include constraints on the shape of the earth (e.g., support and flatness) and on the relative locations and motions of objects in the cosmology (e.g., continuity). However, many Indian children borrow the idea that the earth is supported by an ocean or a body of water from folk cosmology. This solution to the support constraint on the shape of the earth is not found in American children's initial cosmologies.  相似文献   
886.
887.
No one factor could have as great an impact on multinational corporations (MNCs) than the dual-career phenomena. The selection of expatriate candidates is a complex process made more arduous by the career orientation of the expatriate's spouse. The need for a social support network is essential for the dual-career family to increase the probability of successfully completing an expatriate assignment.  相似文献   
888.
Zusammenfassung Chronisch-entzündliche Darmerkrankungen (Morbus Crohn, Colitis ulcerosa) werden traditionellerweise zu den psychosomatischen Erkrankungen gez?hlt. In jüngster Zeit wurde diese Zuordnung aber mehrfach in Frage gestellt; zugleich wurden biomedizinische Faktoren beschrieben, die in der Entstehung und im Verlauf der Erkrankungen eine Rolle spielen k?nnten. Die vorliegende übersichtsarbeit hat das Ziel, den aktuellen Stand der biomedizinischen und psychosomatischen Forschung zur ?tiologie und Verlaufsgestaltung bei chronisch-entzündlichen Darmerkrankungen darzustellen und unter methodischen Gesichtspunkten kritisch zu bewerten. Forschungsergebnisse zu folgenden Themenbereichen werden referiert: Epidemiologie; soziodemographische Merkmale; Genetik; di?tetische Faktoren und Zigarettenrauchen; Medikamente; Permeabilit?tsst?rung der Darmepithelien; immunologische Faktoren; mikrobiologische Faktoren; psychiatrische St?rung; emotionale Symptomatik, Pers?nlichkeitsmerkmale; kritische Lebensereignisse und psychosozialer Stre?; Lebensqualit?t und Krankheitsbew?ltigung.   相似文献   
889.
890.
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