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   5529篇
  免费   220篇
  国内免费   2篇
  2021年   43篇
  2020年   72篇
  2019年   100篇
  2018年   151篇
  2017年   131篇
  2016年   147篇
  2015年   114篇
  2014年   136篇
  2013年   621篇
  2012年   196篇
  2011年   228篇
  2010年   146篇
  2009年   153篇
  2008年   206篇
  2007年   200篇
  2006年   181篇
  2005年   180篇
  2004年   161篇
  2003年   169篇
  2002年   174篇
  2001年   130篇
  2000年   118篇
  1999年   97篇
  1998年   76篇
  1997年   66篇
  1996年   72篇
  1995年   70篇
  1994年   71篇
  1993年   65篇
  1992年   72篇
  1991年   67篇
  1990年   74篇
  1989年   77篇
  1988年   64篇
  1987年   54篇
  1986年   62篇
  1985年   62篇
  1984年   68篇
  1983年   52篇
  1982年   66篇
  1981年   58篇
  1980年   46篇
  1979年   48篇
  1978年   53篇
  1976年   47篇
  1975年   50篇
  1973年   40篇
  1970年   39篇
  1968年   39篇
  1967年   47篇
排序方式: 共有5751条查询结果,搜索用时 15 毫秒
181.
This paper describes a seven-stage model of post-adolescent reasoning styles, the most advanced of which is called “Reflective Judgment.” The model outlines a sequence of increasingly complex methods of justification of beliefs. This model demonstrates how people's conceptions of the nature of knowledge, the nature of reality, and their concepts of justification change over age/educational levels. Sixty subjects from three age/educational levels (high school, college, and graduate school) were administered the Reflective Judgment Interview. In addition, subjects were tested on four other factors hypothesized to affect reflective judgment scores. Two were competing theoretical constructs: verbal ability (using Terman's Concept Mastery Test) and Piagetian formal operations (chemicals and pendulum tasks); and two were potentially confounding factors: socio-economic status (using Hollingshead's two-factor index) and verbal fluency (number of words spoken during the interview). Highly significant differences (p < .001) were found on reflective judgment level between the three age/educational groups, and could not be statistically accounted for by scores earned on measures of the other four factors. Whereas verbal ability was found to be closely related to reflective judgment level, the differences between groups on reflective judgment could not be solely attributed to this factor.  相似文献   
182.
An evaluation is offered of one of the Government's measures to alleviate youth unemployment-the Work Experience Programme (WEP). In a small-scale study conducted in Essex, most of the young people and employers involved in the scheme thought that its benefits considerably outweighed its disadvantages, and this view was shared by careers officers. The scheme helped the young participants to develop confidence in themselves and in their working potential, although at the same time it made them anxious about their ability and/or opportunity to continue this development. As a short-term response to youth unemployment, WEP has considerable value. Without certain improvements, however, it is not adequate for dealing with long-term structural unemployment.  相似文献   
183.
184.
A recurrent problem in interpreting research showing differential reactions to the sexes is that such results may reflect real behavior differences among those observed or differential expectations of those observing. This study used a methodology which allowed these two competing explanations to be tested by assessing whether subjects' ratings of taped interactants whose gender was ambiguous would be determined mainly by what gender the subjects thought the interactants were or by the interactants' behavior. The results showed that the causes of the sex differences in assessments differed depending on what type of assessment was being made. Specifically, behavior differences and not observers' expectations about such differences largely determined observers' ratings of specific attributes of the interactants, but observers' expectations and not behavior differences determined observers' general ratings of masculinity/femininity.  相似文献   
185.
186.
187.
According to previous research, young children do not understand displaced aggression. The present study examines the early phases of the understanding of the causes of moderately and extremely displaced aggression. Preschool and kindergarten children (3 to 5 years of age) viewed eight videotaped episodes of displaced aggression. Their comprehension of this aggression was assessed by means of open ended questions and forced choice picture selections. By age 5 most children had some understanding of displaced aggression, but this understanding was not complete. The early understanding revealed in the present study may be due to the use of short, simple realistic videotaped episodes appropriate for the limited processing abilities of young children. Extreme displacement was not more difficult to understand than moderate displacement.  相似文献   
188.
An adaptive up-down tracking procedure was used in combination with a visually reinforced head turn response to examine auditory sensitivity for 500, 2000, and 8000-Hz tone bursts in infants 6 to 18 months of age. Six- and 10-month-old infants were tested with headphone presentation of stimuli, while 10-, 14, and 18-month-olds were tested in sound field. Infant threshold estimates for both headphone and sound field were within 15 dB of adult comparisons for all frequencies and age groups. Six-month-olds were significantly less sensitive to the 8000-Hz tone than to either of the lower frequency stimuli, but older infants demonstrated approximately equal sensitivity for all three frequencies tested.  相似文献   
189.
The present experiment tested the hypothesis that hypochondriacal individuals commonly use reports of physical illness and symptoms as a strategy to control attributions made about their performances in evaluative settings (i.e., self-handicapping strategies). Specifically, it was predicted that hypochondriacal individuals would report more recent physical illness and complaints and more current physical symptoms in an evaluative setting in which poor health could serve as an alternative explanation for poor performance than would either individuals in an evaluative setting in which poor health was precluded as an excuse or individuals in a nonevaluative setting. As predicted, results supported this self-protective pattern of complaints in a hypochondriacal sample but not in a nonhypochondriacal group. The self-protective role of hypochondriacal behavior is discussed in relation to other theory and research on the nature and treatment of hypochondriasis.  相似文献   
190.
The behavioral effects of d-amphetamine sulfate were studied in adult male stumptail macaques living within a large heterogeneous group in an outdoor enclosure. Among five subjects that received a range of doses (.01 to .3 mg/kg), d-amphetamine increased self-aggressive behavior and abnormal posturing in subjects that exhibited these types of behavior prior to drug administration, but it had no effect in subjects not exhibiting those activities in the absence of the drug. For the former subjects, the dose-effect curves for self-aggression were of an inverted U-shape analogous to the effect of d-amphetamine on schedule-controlled behavior. Over the range of doses studied, the curve for abnormal posturing was monotonic. The data indicate that d-amphetamine can have effects on untrained behavior in individual animals in a quasinatural environment that are qualitatively and quantitatively similar to the behavioral effects observed in other laboratory environments, and that d-amphetamine does not evoke or increase a behavioral response in individual subjects that do not exhibit the response in the absence of the drug.  相似文献   
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