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   4030篇
  免费   106篇
  国内免费   29篇
  2012年   355篇
  2011年   420篇
  2010年   88篇
  2009年   39篇
  2008年   301篇
  2007年   336篇
  2006年   344篇
  2005年   241篇
  2004年   230篇
  2003年   236篇
  2002年   228篇
  2001年   168篇
  2000年   170篇
  1999年   76篇
  1998年   27篇
  1997年   19篇
  1996年   9篇
  1994年   7篇
  1993年   14篇
  1992年   12篇
  1991年   10篇
  1990年   20篇
  1989年   14篇
  1988年   17篇
  1987年   18篇
  1986年   10篇
  1985年   25篇
  1984年   14篇
  1983年   20篇
  1982年   14篇
  1981年   14篇
  1979年   13篇
  1978年   11篇
  1976年   9篇
  1969年   12篇
  1966年   7篇
  1965年   12篇
  1964年   11篇
  1959年   23篇
  1958年   61篇
  1957年   64篇
  1956年   51篇
  1955年   43篇
  1954年   62篇
  1953年   50篇
  1952年   56篇
  1951年   40篇
  1950年   43篇
  1949年   19篇
  1948年   24篇
排序方式: 共有4165条查询结果,搜索用时 23 毫秒
991.
Two experiments compared the effectiveness of three types of elaboration on incidental and intentional memory for a story: self-generated, self-choice, and experimenter-provided elaboration. In Exp. 1, using the incidental memory paradigm, second graders listened to a fantastic story and then, in the self-generated condition, answered a "why" question about a particular topic in the story. In the self-choice condition, they chose one of the alternative answers to the question and in the experimenter-provided condition, judged the appropriateness of each of two provided answers. This was followed by free-recall and cued-recall tests. Subjects were categorized into two groups, good and poor academic achievers in terms of academic scores in four subject matter areas. For good academic achievers, self-choice elaboration led to a better cued recall than the other two elaboration types. The cued-recall performance of poor achievers was not different with the three conditions. In Exp. 2, using the intentional memory paradigm, the subjects intended to learn a different story and then performed the same procedure as Exp. 1. For poor achievers, self-choice elaboration led to a worse free recall than the other elaboration types, but the free recall of good achievers was not significantly different for the three types of elaboration. The results were interpreted as showing that the effects of self-choice elaboration on incidental and intentional memory were correlated with subjects' academic performance.  相似文献   
992.
Although codes of ethics of the mental health professions and the recently developed race- and gender-specific models of counseling and psychotherapy stipulate positive and accepting attitudes toward racial minorities and women, formal assessment of these attitudes has been hindered by the absence of appropriate measurement tools and generalizable data. This study provides some normative data by reporting responses of 705 psychologists and social workers to the Quick Discrimination Index, a psychometrically sound 23-item self-report measure previously administered to several different professional groups. Analysis indicated psychologists and social workers reported particularly positive attitudes toward racial minorities and women but expressed the same racial and sex contradictions, ambivalences, and vulnerabilities reported by the general public.  相似文献   
993.
The effects of task performance on metacognitive experiences and relations between task performance and metacognitive experiences in problem-solving were examined with 69 Japanese undergraduate students. The task was a puzzle called the cross breaker, consisting of seven pieces, and several figures were constructed by using those seven pieces. Eight types of metacognitive experiences, before and after performing the task, were rated. Participants were classified into Success and Failure groups based on their task performance. Use of all but two metacognitive experiences differed between the groups. There were medium to high positive and negative correlations for metacognitive experiences with performance after the puzzle task, whereas metacognitive experiences before the task generally had no significant correlations with performance. Despite small N, participants' metacognitive experiences seemed to reflect their actual performance, suggesting that people obtain information from their performance and use it to revise their metacognitive experiences. Furthermore, metacognitive experiences may help people solve similar problems in the future.  相似文献   
994.
The authors hypothesize that the symptoms of obsessive-compulsive disorder (OCD), despite their apparent nonrationality, have what might be termed an epistemic origin--that is, they stem from an inability to generate the normal "feeling of knowing" that would otherwise signal task completion and terminate the expression of a security motivational system. The authors compare their satiety-signal construct, which they term yedasentience, to various other senses of the feeling of knowing and indicate why OCD-like symptoms would stem from the abnormal absence of such a terminator emotion. In addition, they advance a tentative neuropsychological model to explain its underpinnings. The proposed model integrates many previous disparate observations and concepts about OCD and embeds it within the broader understanding of normal motivation.  相似文献   
995.
The present studies assessed the effect of behavioral inhibition on interactions of college students in mixed-sex groups. In Study 1, 20 participants were arranged into two dyadic groups based on self-rated measures of approach/withdrawal behavior. These dyads (inhibited men/uninhibited women; inhibited women/uninhibited men) were videotaped during an unstructured 5-min. interaction in a laboratory. Time series analysis indicated greater behavioral covariation in the inhibited men/uninhibited women dyads and less behavioral covariation in the inhibited women/uninhibited men dyads. Additional analyses indicated a relationship between inhibition and comfort experienced during the interaction. Inhibited participants, particularly women, reported feeling uncomfortable while interacting with an uninhibited male partner. A second study corroborated the findings reported in Study 1 and also noted elevated heart rate in the inhibited women. This increased discomfort in women appeared to be related to heightened self-consciousness during the interaction.  相似文献   
996.
The article introduces the Parental Sensitivity Assessment Scale (PSAS) and examines the influence of the PSAS score and other factors on the general cognitive level in pre-school children born with very low birth weight (VLBW). McCarthy general cognitive index (GCI) was obtained for 102 VLBW and 92 normal birth weight (NBW) control children in Denmark in the mid-1980s. The mean ages of the two groups were 52.4 vs. 53.1 months. Parental sensitivity was assessed using PSAS. There was no significant difference in the mean PSAS score between the two birth weight groups (p > 0.3). Birth weight group (p < 0.001) and mother's schooling (p= 0.026) significantly correlated with GCI in the children. The PSAS score was highly significantly correlated to the variance of the GCI (p < 0.001), which was not explained by VLBW and mother's schooling. We found no interactional effect between parental sensitivity and birth weight group (p > 0.5) - the prematurely born children were not more affected by low parental sensitivity than were the control children.  相似文献   
997.
The aim was to develop a theoretical understanding of the decision-making process leading to appendectomy. A qualitative interview study was performed in the grounded theory tradition using the constant comparative method to analyze data. The study setting was one county hospital and two local hospitals in Sweden, where 11 surgeons and 15 surgical nurses were interviewed. A model was developed which suggests that surgeons' decision making regarding appendectomy is formed by the interplay between their medical assessment of the patient's condition and a set of contextual characteristics. The latter consist of three interacting factors: (1) organizational conditions, (2) the professional actors' individual characteristics and interaction, and (3) the personal characteristics of the patient and his or her family or relatives. In case the outcome of medical assessment is ambiguous, the risk evaluation and final decision will be influenced by an interaction of the contextual characteristics. It was concluded that, compared to existing, rational models of decision making, the model presented identified potentially important contextual characteristics and an outline on when they come into play.  相似文献   
998.
999.
This 2-year study examined the effects of early second language exposure on phonological awareness skills. Syllable, onset-rime and phoneme awareness skills of 72 anglophone children attending English or French immersion programs in primary and grade 1 were investigated. Three-way mixed ANOVAS revealed the following effects and interactions. In terms of grade effect, grade 1 students performed significantly better than primary students on phoneme and onset-rime tasks. A stimulus language effect was observed for the three levels of phonological awareness. All children performed better on English tasks than on French ones. Interaction effects of stimulus language by program were revealed for phoneme as well as syllable tasks. Posthoc analyses revealed that French students performed better on English phoneme and syllable tasks than on French, while English students performed better than French immersion students on French syllable tasks. Correlational analyses revealed significant relationships between reading and phoneme and onset-rime phonological awareness tasks regardless of program of instruction (English, French immersion) or language of reading test (English, French). Syllable awareness was only significantly correlated with the French non-word reading task for the French immersion students.  相似文献   
1000.
In two experiments, adult participants explored a symmetrical three-tiered computer-simulated building that contained six distinctive objects, two on each floor. Following exploration, the objects were removed, and the participants were asked to make direction judgments from each floor, indicating the former positions of the objects on that floor and on higher and lower floors. Relative tilt error scores indicated a bias, in that targets that were higher than the test location were judged as consistently lower than their actual positions and targets that were lower than the test location were judged as consistently higher than their actual positions. Absolute tilt errors revealed an asymmetry, with more accurate and less variable tilt errors for judgments directed to lower floors than for judgments directed to higher floors. Experiment 3 ruled out an account of the findings that does not relate them to spatial memory. The results suggest that the superiority of downward over upward spatial judgments, previously reported in two-dimensional visual-spatial tasks, extends to navigational spatial memory.  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