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   15850篇
  免费   712篇
  国内免费   7篇
  2020年   176篇
  2019年   190篇
  2018年   288篇
  2017年   251篇
  2016年   298篇
  2015年   227篇
  2014年   291篇
  2013年   1144篇
  2012年   513篇
  2011年   466篇
  2010年   333篇
  2009年   293篇
  2008年   433篇
  2007年   444篇
  2006年   384篇
  2005年   375篇
  2004年   323篇
  2003年   284篇
  2002年   307篇
  2001年   676篇
  2000年   667篇
  1999年   454篇
  1998年   173篇
  1997年   165篇
  1996年   163篇
  1995年   138篇
  1992年   361篇
  1991年   342篇
  1990年   353篇
  1989年   300篇
  1988年   286篇
  1987年   281篇
  1986年   256篇
  1985年   258篇
  1984年   238篇
  1983年   203篇
  1982年   157篇
  1979年   220篇
  1978年   172篇
  1977年   148篇
  1975年   190篇
  1974年   230篇
  1973年   229篇
  1972年   183篇
  1971年   180篇
  1970年   150篇
  1969年   176篇
  1968年   210篇
  1967年   191篇
  1966年   156篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
941.
Clinical Child and Family Psychology Review - In recent years, there has been a proliferation of research regarding transgender and gender nonconforming (TGNC) people. The stigma and legal...  相似文献   
942.
Cognitive Processing - A correction to this paper has been published: https://doi.org/10.1007/s10339-021-01027-4  相似文献   
943.

This study aimed to examine the role of positive relationships and academic achievement in predicting student well-being, i.e. subjective happiness. This study employed a longitudinal design with two waves of data collection on a sample of 786 primary school students in Hong Kong. Students completed questionnaires on parent-child relationship, teacher-student relationship, peer relationship, academic achievement, and happiness at the beginning and end of the school year. Path analysis was used for data analysis. The results indicated that Time 1 parent-child relationship and peer relationship were associated with Time 2 academic achievement, after controlling for Time 1 academic achievement. However, only Time 1 parent-child relationship was predictive of Time 2 happiness. Time 2 academic achievement was a mediator between Time 1 parent-child relationship and peer relationship and Time 2 happiness. Furthermore, girls reported higher levels of academic achievement when they perceived better peer relationship than did boys, and girls were happier when they had higher levels of academic achievement than were boys. The results suggested the need to put in place strategies to enhance parent-child relationship, peer relationship, and a harmonious classroom.

  相似文献   
944.
A model was presented describing the reciprocal influence of disruptions in parent discipline practices on irritable exchanges between the target child and other family members. Disrupted parent discipline and irritable microsocial exchanges within the family were hypothesized to provide a basic training for aggression that generalizes to other settings such that the child is identified by peers, teachers, and parents as physically aggressive. Physical fighting was thought to lead to rejection by the normal peer group, which was hypothesized to feed back to further exacerbate fighting. Multilevel assessment including interview, questionnaires, laboratory studies, and home observations were carried out with the families of 91 preadolescent and adolescent boys. Nine indicators from the assessment battery were used to define the constructs Inept Parental Discipline, Negative Microsocial Exchanges, Physical Fighting, and Poor Peer Relations. Structural equations (LISREL VI) were used to describe the relations among the constructs. The t values for the path coefficients were significant. A chi-square analysis showed an acceptable fit between the model and the empirical findings. The findings were interpreted as being consistent with the hypothesis that under certain circumstances, family interaction may serve as basic training for aggression. In the present study, interactions with siblings in the home seemed to serve a pivotal role.  相似文献   
945.
946.
Thirty-three twelve-month-old infants were divided into three groups based on the frequency and length of naturally-occurring nontraumatic separations from mother during the first year. One group had experienced only brief separations when left with a babysitter for an evening. A second group had been left once or twice for an average of five days while parents vacationed. A third group had been left regularly and frequently during the daytime, usually because mother was working. These groups were compared on measures of reaction to separation and reunion, in the home and in the laboratory, at one year of age. No group differences were found on any of the dependent variables. It is suggested that the quality of substitute care is probably more important than separation per se in mediating the impact of employment or daycare on infant development.  相似文献   
947.
The psychomotor development of 1,406 low socioeconomic infants from Santiago, Chile, was examined. Four groups of infants were assessed: 12, 15, 18 and 21 months of age. Results indicated that as chronological age increased, the number of infants who fell into at-risk or delay categories increased.  相似文献   
948.
The question investigated in this study is how the temperament traits of strength of excitation (SE), strength of inhibition (SI), and mobility (MO) affect behaviour during the execution of computer tasks and tasks interrupting them. Several hypotheses, partly derived from the regulative theory of temperament, were tested in an experiment in which the natural environment and the types of task commonly performed by secretaries were simulated. The sample consisted of 39 female secretaries (21–64 years old). It was found that individuals high on SE and MO needed less time to resume tasks after an interruption than individuals low on these temperament traits. Interruptions similar to the main task resulted in longer resumption times for low-SE individuals. MO was negatively related to the time needed to perform the main task. A model describing the relationship between the frequency of switches between tasks and the speed of task performance in low-MO and high-MO individuals is presented.  相似文献   
949.
The role played by the neonatal 5-hydroxytryptamine (5HT) system in the organization and sexual differentiation of adult agonistic behavior was investigated in rats. Focus was on the 5HT2 receptor subtype, which has been demonstrated to be involved in agonism control in the adult. 5HT2 activity was experimentally manipulated by administration of a specific agonist [1-(2, 5-dimethoxy-4-iodophenyl)-2-aminopropane HCl (DOI)] or antagonist (ritanserin) during the second week of life, when serotonin is known to concur to anatomical and behavioral sexual differentiation. Interactions between early 5HT2 activity, genetic sex, and neonatal circulating testosterone (T) were studied by administering the ligands to males, females, and androgenized females. At adulthood, the animals were tested for both aspects of agonism, i. e., aggression and defense, in a 20-min confrontation with an unfamiliar conspecific of the same sex, age, body weight, and social experience. Neonatal administration of the 5HT2 antagonist ritanserin increased aggression independently of sex; it also increased defense, but this effect was confined to males. The agonist DOI had no effect on aggression, but enhanced defense in males and androgenized females, with an effect which depended therefore more on neonatal T than genetic sex. Females appeared in general less sensitive to neonatal 5HT2 manipulation than both androgenized females and males; this suggests that neonatal T is crucial for experimental modifications of neonatal 5HT2 activity to have any consistent effect on adult agonistic behavior. On the other hand, effects observed in males and androgenized females were dependent on the behavior considered and the drug administered. This was especially evident for defense, enhanced by ritanserin in males only, and in both males and androgenized females by DOI. Neonatal 5HT2 activity seems therefore to play a role in the modulation of adult agonistic behaviors, which depends on the behavior considered and is under multiple control of genetic sex and hormonal neonatal substrate. © 1994 Wiley-Liss, Inc.  相似文献   
950.
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