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   1812篇
  免费   62篇
  2022年   11篇
  2021年   8篇
  2020年   34篇
  2019年   29篇
  2018年   32篇
  2017年   46篇
  2016年   47篇
  2015年   45篇
  2014年   29篇
  2013年   248篇
  2012年   78篇
  2011年   81篇
  2010年   41篇
  2009年   46篇
  2008年   70篇
  2007年   68篇
  2006年   68篇
  2005年   66篇
  2004年   70篇
  2003年   67篇
  2002年   73篇
  2001年   28篇
  2000年   21篇
  1999年   27篇
  1998年   25篇
  1997年   21篇
  1996年   27篇
  1995年   23篇
  1994年   22篇
  1993年   31篇
  1992年   14篇
  1991年   27篇
  1990年   22篇
  1989年   20篇
  1988年   24篇
  1987年   20篇
  1986年   18篇
  1985年   22篇
  1984年   17篇
  1983年   23篇
  1982年   22篇
  1981年   26篇
  1980年   15篇
  1979年   14篇
  1978年   21篇
  1977年   21篇
  1976年   14篇
  1975年   7篇
  1974年   9篇
  1973年   7篇
排序方式: 共有1874条查询结果,搜索用时 15 毫秒
71.
Rapid growth has been observed in recent years in the number of women entering traditionally male blue-collar occupations, yet researchers have paid little attention to this pioneering group. The present study undertook a comparison of the job conditions of two groups of nontraditional women workers, tradeswomen (N=71), and transit workers (N=151); a third group, school secretaries (N=389), was studied as a comparison group of traditionally female workers. Results from a 16-page mail questionnaire revealed that women in traditionally male occupations encountered significantly more adverse working conditions than did their traditional counterparts, and, in addition, reported significantly less satisfaction and more stress at work. Tradeswomen were the most likely to experience sexual harassment and sex discrimination, and black tradeswomen to experience race discrimination. The degree of job satisfaction expressed by the secretaries was unexpected, since most evidence suggests that clerical workers lack autonomy, and encounter boredom and routinization on the job. These findings are discussed in terms of gender segregation and the need to focus future research efforts on specific occupational groups in order to make appropriate policy recommendations as well as to provide help for women in these jobs.This research was supported by grants from the National Institute for Occupational Safety and Health (Grant No. 1 RO1 OH02162-01A1) and the College of Health and Human Development, The Pennsylvania State University. The authors wish to acknowledge the invaluable contributions of Patty Lambert, Ming Qi Wang, Mary Harmon, Joseph Vasey, Gina Jay, Darrell Harvey, and Haleh Rastegary.  相似文献   
72.
A framework for conceptualizing the relationship between event knowledge and planning is proposed, and two experiments are reported that examined children's ability to draw on event knowledge in planning. Preschool children were asked to plan and execute shopping trips to a pretend grocery store. Half of the children planned for two events on successive trials (Level 1, single-goal planning) and half of the children planned for two events simultaneously (Level 2, multiple-event planning). The amount of external support for planning was also manipulated. In Experiment 1, 3-, 4-, and 5-year-olds were presented with either a clustered or interleaved display. In Experiment 2, 3- and 4-year-olds were given adult assistance in plan construction. Results indicated that children's planning becomes more complex and flexible with age. Older children also rely less on external supports for planning. However, when external support was provided, 3- and 4-year-olds displayed higher-level planning abilities. Results are discussed in terms of the roles of event knowledge and external support in the early development of planning skills.  相似文献   
73.
74.
The clients, who present themselves at our psychiatric day hospital in Amsterdam, often have long-standing problems. These problems are usually of a complex nature, and the age of the clients plays an imporant role in this. Their age varies from seventeen to forty, with an average of twenty-eight.
Efforts were made over a long period to facilitate solutions to the clients' family conflicts. During this time an extensive range of problems within the family were presented of which the symptoms of the client represent just a part.
Working as a family therapist in a psychiatric day hospital, where clients are admitted individually, places the family therapist in a number of dilemmas, especially when many working in the hospital see the problems only as individual ones.  相似文献   
75.
When subjects must identify a barely visible line in a briefly flashed display, their accuracy depends on the configuration of the context in which the target line appears. Weisstein and Harris (1974) found that accuracy is highest when the target is part of a pattern that resembles a unified, three-dimensional object, and lowest in a flat-looking pattern composed of disconnected lines; they labeled this phenomenon the object-superiority effect. In the three experiments reported here, identification accuracy was found to correlate highly and significantly (r =.78) with the judged depth of the patterns. Judged structural relevance of the target line to the pattern (McClelland & Miller, 1979) was uncorrelated with accuracy (r=?.28). Even when the target line appeared as an isolated fragment within the context pattern, a pattern perceived as three-dimensional yielded higher identification accuracy than one perceived as flat.  相似文献   
76.
Facial expressions and vocal cues (filtered speech) of honest and deceptive messages were examined in posed and spontaneous situations. The question of interest was the degree to which nonverbal cues transmit information about deception. Results indicated that (a) for both the facial and vocal channels, posing (as compared to spontaneous behavior) produced a higher level of communication accuracy; (b) facial expressions of deceptive (as compared to honest) messages were rated as less pleasant, while vocal expressions of deception were rated as less honest, less assertive, and less dominant, particularly in the posed condition; (c) the sender's ability to convey honesty was negatively correlated with his/her ability to convey deception, suggesting the existence of a demeanor bias—individual senders tend to appear and sound consistently honest (or dishonest) regardless of whether they deliver an honest or a deceptive message; (d) in the posing condition, the sender's abilities to convey honesty/deception via facial and vocal cues were positively and significantly correlated, whereas in the spontaneous condition they were not; and (e) senders whose full (unfiltered) speech indicated more involvement with their responses were judged as more honest from both their vocal (filtered speech) and facial cues, in both the honest and deceptive conditions.  相似文献   
77.
A program was designed to teach coin equivalence to mentally retarded adolescents. Coin equivalence was defined as choosing several different combinations of coins to equal specified target values. A pretest-posttest matched-groups design was employed with an experimental group receiving the monetary training, and a no-training control group. A multiple baseline across coin-counting responses was also incorporated in the experimental group. Training was divided into six stages, each teaching one specific method of combining coins to equal 10 target values from 5¢ through 50¢. A three-component response chain was used, requiring (a) naming, (b) selecting and counting, and (c) depositing target monetary values into a coin machine. Experimental subjects improved significantly in coin equivalence performance and maintained their skill on follow up tests; control subjects did not.  相似文献   
78.
Direct tests of One-Stage and Two-Stage theories of discrimination learning and concept identification by means of shift experiments yield ambiguous results due to interpretational problems. These difficulties can be avoided by analysing the original acquisition data. A test of the theories is suggested for concept identification experiments which is based on an analysis of the dependence between appropriately constructed response subsequences. Predictions for the theoretical alternatives are derived from a generalized all-or-none model. Results from a concept identification study with adult subjects reject One-Stage theories and support Two-Stage theories.  相似文献   
79.
Procedures for observing, coding, and analyzing parent-infant interactions are described. Sample data are presented to illustrate the outcome of these procedures and the manner in which developmental issues can be addressed using the hardware and software systems described.  相似文献   
80.
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