全文获取类型
收费全文 | 13237篇 |
免费 | 877篇 |
国内免费 | 707篇 |
出版年
2024年 | 31篇 |
2023年 | 171篇 |
2022年 | 241篇 |
2021年 | 315篇 |
2020年 | 389篇 |
2019年 | 433篇 |
2018年 | 621篇 |
2017年 | 610篇 |
2016年 | 576篇 |
2015年 | 415篇 |
2014年 | 431篇 |
2013年 | 1517篇 |
2012年 | 898篇 |
2011年 | 964篇 |
2010年 | 679篇 |
2009年 | 513篇 |
2008年 | 800篇 |
2007年 | 788篇 |
2006年 | 726篇 |
2005年 | 632篇 |
2004年 | 448篇 |
2003年 | 373篇 |
2002年 | 317篇 |
2001年 | 175篇 |
2000年 | 207篇 |
1999年 | 147篇 |
1998年 | 88篇 |
1997年 | 72篇 |
1996年 | 70篇 |
1995年 | 66篇 |
1994年 | 50篇 |
1993年 | 60篇 |
1992年 | 77篇 |
1991年 | 57篇 |
1990年 | 82篇 |
1989年 | 61篇 |
1988年 | 62篇 |
1987年 | 51篇 |
1986年 | 40篇 |
1985年 | 51篇 |
1984年 | 43篇 |
1983年 | 35篇 |
1982年 | 32篇 |
1979年 | 34篇 |
1978年 | 23篇 |
1976年 | 22篇 |
1974年 | 24篇 |
1973年 | 23篇 |
1971年 | 25篇 |
1968年 | 29篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Seventh-grade students and teachers from twenty-three middle and junior high schools were surveyed to determine the association between teacher attitudes, behavioral intentions, and smoking behavior and the prevalence of student smoking. Teacher attitudes toward smoking policies were found to be strongly related to the current smoking behavior of the teacher but not consistently related to student smoking. In addition, teacher likelihood of intervening showed a modest association with teacher smoking status, with current smokers generally indicating being the least likely to intervene for student possession or use of cigarettes. Teacher intentions to intervene were strongly associated with the prevalence of smoking among boys but not girls. 相似文献
32.
Twenty treated and 18 untreated spider phobics were exposed to a series of 72 slides. Three different categories of slides were used: phobia-relevant slides (spiders), alternative fear-relevant slides (weapons), and neutral slides (flowers). Slides were randomly paired with either a shock, a tone, or nothing at all. Despite the absence of a systematic correlation between slides and outcomes, untreated phobics strongly overestimated the covariation between spider slides and shock. Treated phobics did not show a covariation bias, suggesting that such bias can be modulated by behavioral treatment. In addition, untreated subjects were more confident about their contingency estimates than were treated subjects. The present results fit with earlier studies. 相似文献
33.
To integrate the 5-dimensional simple-structure and circumplex models of personality, the Abridged Big Five Dimensional Circumplex (AB5C) taxonomy of personality traits was developed, consisting of the 10 circumplexes that can be formed by pitting each of the Big Five factors against one another. The model maps facets of the Big Five dimensions as blends of 2 factors. An application to data consisting of 636 self-ratings and peer ratings on 540 personality trait adjectives yielded 34 well-defined facets out of a possible 45. The AB5C solution is compared with simple-structure and lower dimensional circumplex solutions, and its integrative and corrective potential are discussed, as well as its limitations. 相似文献
34.
35.
Functional models of face recognition and speech production have developed separately. However, naming a familiar face is, of course, an act of speech production. In this paper we propose a revision of Bruce and Young's (1986) model of face processing, which incorporates two features of Levelt's (1989) model of speech production. In particular, the proposed model includes two stages of lexical access for names and monitoring of face naming based on a "perceptual loop". Two predictions were derived from the perceptual loop hypothesis of speech monitoring: (1) naming errors in which a (correct) rare surname is erroneously replaced by a common surname should occur more frequently than the reverse substitution (the error asymmetry effect); (2) naming errors in which a common surname is articulated are more likely to be repaired than errors which result in articulation of a rare surname (the error-repairing effect). Both predictions were supported by an analysis of face naming errors in a laboratory face naming task. In a further experiment we considered the possibility that the effects of surname frequency observed in face naming errors could be explained by the frequency sensitivity of lexical access in speech production. However, no effect of the frequency of the surname of the faces used in the previous experiment was found on face naming latencies. Therefore, it is concluded that the perceptual loop hypothesis provides the more parsimonious account of the entire pattern of the results. 相似文献
36.
37.
Serial recall of lip-read, auditory, and audiovisual memory lists with and without a verbal suffix was examined. Recency effects were the same in the three presentation modalities. The disrupting effect of a suffix was largest when it was presented in the same modality as the list items. The results suggest that abstract linguistic as well as modality-specific codes play a role in memory for auditory and visual speech. 相似文献
38.
L Matin W X Li 《Journal of experimental psychology. Human perception and performance》1992,18(1):257-289
The physical elevation corresponding to visually perceived eye level (VPEL) changes linearly with the pitch of a visual field. Deviations from true eye level average more than 0.5 times the angle of pitch over a 65 degrees pitch range. A visual field consisting of 2 dim, isolated vertical lines in darkness is more than 4/5 as effective as that of a complexly structured visual field; 2 horizontal lines have a small and inconsistent effect. Differences in influence on VPEL between pitched-from-vertical and horizontal lines were predicted from an analysis that extracted differences in retinal perspective resulting from changes in pitch. The Great Circle Model (GCM), based on a spherical approximation to the erect, stationary eye, predicts the present results and results of 8 other sets of experiments. The model treats the influence of a single line on VPEL as systematically related to the elevation of the intersection between the great circle containing the image of the line and the central vertical retinal meridian; generalized GCM combines visual inputs with inputs from the body-referenced mechanism and maps onto the central nervous system. 相似文献
39.
M C Rodriguez-Perez F de Vicente-Perez G Gomez-Jarabo Garcia 《Behavioral and neural biology》1992,58(3):165-170
The use of neurological tests in various states of undernutrition has confirmed the presence of delays in reflex ontogeny. Glucocorticoid administration in conditions of normal nutrition produces diminished growth and alterations in brain development similar to those observed in malnutrition, but there is not enough evidence about its effect on reflex development. In addition, some facts lead us to think that the use of permissive doses of these hormones during gestation could alleviate some of the effects of protein malnutrition on the development of pups. In the present study the ages at which certain reflexes appeared in the offspring of Wistar rats (Rattus norvegicus) fed a 20% (N) or 10% (M) protein diet from a week before conception to the end of lactation were observed. Each dietary group was subdivided into two: mothers receiving a daily injection during gestation either of a 0.9% NaCl (S) solution or of a 0.5 mg/100 g weight hydrocortisone acetate (C) solution. Results showed that the NS group of pups generally presented earlier ages of appearance of the variables under study than the remaining groups. Pups of the NC group presented delays in the age of appearance of reflexes. Finally, protein malnutrition delayed the appearance of reflexes and this effect seemed to be attenuated by treatment with hydrocortisone. Thus, hydrocortisone administration in protein malnutrition conditions seems to be beneficial although the results are harmful when administered under normal nutritional conditions. 相似文献
40.
本工作采用了一种研究儿童理解不精确量词的经验方法,初步探讨了四岁至十岁儿童理解数量词“几个”、“很多”的发展特点。结果提示:儿童对两个数量词的理解与实验给出的论域(数量范围)关系密切;数量词“几个”比“很多”较早被年幼儿童所理解。其发展特点:四岁至十岁儿童在[0,10],[0,20]范围上,均能较好理解“几个”;六岁以上儿童只能在[0,10]的范围上理解“很多”的词义;四岁儿童则表现出把“很多”与“全部”混同。 相似文献