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   52155篇
  免费   1001篇
  国内免费   5篇
  53161篇
  2020年   483篇
  2019年   656篇
  2018年   887篇
  2017年   956篇
  2016年   956篇
  2015年   725篇
  2014年   802篇
  2013年   4004篇
  2012年   1411篇
  2011年   1552篇
  2010年   989篇
  2009年   967篇
  2008年   1330篇
  2007年   1313篇
  2006年   1185篇
  2005年   1044篇
  2004年   969篇
  2003年   1005篇
  2002年   978篇
  2001年   1802篇
  2000年   1752篇
  1999年   1279篇
  1998年   570篇
  1997年   481篇
  1996年   490篇
  1992年   1080篇
  1991年   1049篇
  1990年   998篇
  1989年   941篇
  1988年   933篇
  1987年   896篇
  1986年   871篇
  1985年   943篇
  1984年   747篇
  1983年   619篇
  1981年   484篇
  1979年   772篇
  1978年   565篇
  1977年   509篇
  1976年   486篇
  1975年   655篇
  1974年   742篇
  1973年   795篇
  1972年   638篇
  1971年   577篇
  1970年   554篇
  1969年   550篇
  1968年   692篇
  1967年   618篇
  1966年   638篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
881.
The lexical representation of Serbo-Croatian nouns was investigated in a lexical decision task. Because Serbo-Croatian nouns are declined, a noun may appear in one of several grammatical cases distinguished by the inflectional morpheme affixed to the base form. The grammatical cases occur with different frequencies, although some are visually and phonetically identical. When the frequencies of identical forms are compounded, the ordering of frequencies is not the same for masculine and feminine genders. These two genders are distinguished further by the fact that the base form for masculine nouns is an actual grammatical case, the nominative singular, whereas the base form for feminine nouns is an abstraction in that it cannot stand alone as an independent word. Exploiting these characteristics of the Serbo-Croatian language, we contrasted three views of how a noun is represented: (1) the independent-entries hypothesis, which assumes an independent representation for each grammatical case, reflecting its frequency of occurrence; (2) the derivational hypothesis, which assumes that only the base morpheme is stored, with the individual cases derived from separately stored inflectional morphemes and rules for combination; and (3) the satellite-entries hypothesis, which assumes that all cases are individually represented, with the nominative singular functioning as the nucleus and the embodiment of the noun’s frequency and around which the other cases cluster uniformly. The evidence strongly favors the satellite-entries hypothesis.  相似文献   
882.
Does varying the spacing of repetitions over intervals as long as 1 week aftect recall? The answer from three experiments is yes. Subjects incidentally processed words repeated within a single list and words repeated in separate lists at list spacings of up to 1 week. Memory was tested by free recall shortly after the second presentations or after retention intervals of up to 1 week. Recall of the words repeated across separate lists conformed to a proportionality rule. When the retention interval is short relative to the spacing intervals, performance is inversely related to spacing. When the retention interval is a large proportion of the spacing intervals, performance is directly related to spacing. Does varying the spacing of repetitions within a single list affect recall after a retention interval of 2 weeks? The answer depends on the processing used while studying the words. Processing that generated interitem associations resulted in a within-list spacing effect even after a 2-week retention interval. Without the interitem associations, the effect was absent after a 1-day retention interval. Most of these findings were explained by examining the changing relationship between the retrieval context and the context stored during study.  相似文献   
883.
Lateralization for Hebrew words was tested in both the visual and auditory modalities in Israeli children learning to read their native language, Hebrew. A left visual field preference for tachistoscopically presented words was found in the second graders in contrast to a right visual field preference for the same words in the third graders. Children in both grades showed a right ear dominance for similar words presented dichotically. These data suggest right hemisphere involvement in acquiring reading skills of a native language.  相似文献   
884.
The process involved in recall from long-term memory were studied through the use of a general knowledge questionnaire and the technique of pupillometry. Degree of processing of the components of the retrieval process was inferred from second-by-second monitoring of pupil size. Measurements were recorded during subjects' attempts to retrieve the answer to the query, or if unsuccessful, from clues of the target (first and last letters), and if still unsuccessful, to recognize the presented target word as being associated with the question (the “Of course”, or “That's it!” experience). Pupil size differed according to the nature of the three task demands. Additionally, there were differences based on the type of outcome within the question trial (e.g., between target known but blocked — feeling-of-knowing/tip-of-tongue — and target not known), and the answer trial (recognize vs not recognize the question—answer relationship). The results were related to the search and decisional processes of retrieval.  相似文献   
885.
This study examines the vocational interests and personality characteristics of 69 homeless, unemployed men using the Vocational Preference Inventory. Results indicate significant occupational interest, comparable to data reported on employed adults, and numerous vocational “types.” Personality scales, however, were not consistent with these vocational measures. Rather, they were indicative of possible behavioral and employment problems. Findings are discussed in terms of previous research on populations whose level of achievement was incongruous with their aspirations.  相似文献   
886.
887.
888.
889.
Fifty-six fourth-grade children were categorized as either high or low in trait anxiety and then assigned to a self-instruction treatment, minimal-treatment, or no-treatment control condition. At both pretest and posttest, the subjects recited a memorized poem while being videotaped with the expectation that they would be judged on their performance. State anxiety measures, a behavior rating of anxiety, a measure of performance accuracy and the time involved in reciting a poem were obtained at both pretest and posttest. Contrary to expectation, the self-instructional training resulted in subjects' exhibiting greater signs of behavioral anxiety, subjects' hurrying through the task (taking less time to recite the poem) and high trait-anxiety subjects' reporting more state anxiety while anticipating reciting the poem. Correlational analyses indicated that trait anxiety was significantly related to the measures of state anxiety and the behavior rating of anxiety but not to performance accuracy.  相似文献   
890.
The advantages of selecting agoraphobic patients for treatment by group exposure according to their residential geographic neighbourhood were evaluated in terms of facilitation of ‘homework’ practice and increased social contact. Both ‘zoned’ and ‘unzoned’ groups showed gains in ability to perform hierarchy items after 11 sessions of exposure, relative to a no-treatment control group. However only zoned subjects showed significant reductions in experienced anxiety when executing such items. Self-ratings of overall phobic severity also suggested a zoned group was superior to unzoned while assessors' ratings indicated both groups as equally improved. Only zoned subjects showed a significant increase in social range. Improvements were maintained at 3-months follow-up. No effect of treatment was found on either the Zung measure of anxious mood or on social integration.These results suggest that, where practical, zoning might offer the means for desirable continuation of intensive clinic-based group treatment as well as the benefit of extending treatment into the patients' environment as in home-based treatments. Crucial levels of group cohesion might also be increased although therapists should be prepared to negotiate resistance to a socially demanding programme from patients with significant additional social phobias.  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