全文获取类型
收费全文 | 253篇 |
免费 | 12篇 |
出版年
2023年 | 2篇 |
2021年 | 2篇 |
2020年 | 8篇 |
2019年 | 6篇 |
2018年 | 9篇 |
2017年 | 11篇 |
2016年 | 10篇 |
2015年 | 7篇 |
2014年 | 5篇 |
2013年 | 25篇 |
2012年 | 4篇 |
2011年 | 6篇 |
2010年 | 4篇 |
2009年 | 7篇 |
2008年 | 7篇 |
2007年 | 5篇 |
2006年 | 7篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 7篇 |
2002年 | 4篇 |
2001年 | 7篇 |
2000年 | 8篇 |
1999年 | 4篇 |
1998年 | 7篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 4篇 |
1992年 | 8篇 |
1991年 | 7篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1988年 | 2篇 |
1987年 | 3篇 |
1986年 | 8篇 |
1985年 | 2篇 |
1984年 | 11篇 |
1982年 | 2篇 |
1981年 | 3篇 |
1979年 | 2篇 |
1977年 | 3篇 |
1976年 | 3篇 |
1971年 | 3篇 |
1968年 | 3篇 |
1964年 | 2篇 |
1953年 | 1篇 |
1952年 | 1篇 |
1948年 | 1篇 |
排序方式: 共有265条查询结果,搜索用时 15 毫秒
171.
Patterns of alcohol use among rural and small-town adolescents 总被引:2,自引:0,他引:2
Much research has indicated that age, gender, grade in school, religiosity, socioeconomic status, and involvement in extracurricular activities are all related to adolescent alcohol use. However, most of such research focuses on urban youth. The present study examines patterns of rural adolescent alcohol use and factors associated with such use. The Student Alcohol Inventory was administered to 650 students in grades 7-12 in a small, middle-Atlantic town and surrounding county. The survey contained sections addressing demographic data, attitudes regarding students' alcohol use, and their parents' use. Along with standard SES measures, items were included on unemployment and receipt of government assistance. The dependent variables included age at first drink, frequency of drinking, amount of drinking, and a composite heavy-drinking index. Eighty-three percent of the respondents indicated that they had drunk alcohol and 57% had had their first drink by age 12. Gender and grade in school were significant predictors of alcohol use for all four dependent variables. Time spent in social activities was significant in predicting all but age at first drink. Religiosity was a significant predictor for only one dependent variable--age at first drink. The SES measures were also weak predictors of drinking behavior. Policy implications and directions for future research are discussed. 相似文献
172.
L A French 《Journal of experimental child psychology》1988,45(2):262-279
Children's (5 years, 8 months to 8 years, 4 months) comprehension of "because" and "so" was assessed on both enactment and sentence completion tasks. The use of a within-subject design permitted performance on each task to be interpreted in terms of performance on the other. The pattern of results provided evidence against a componential model for the acquisition of causal connectives. This model holds that the two meaning components (cause, order) are acquired separately, with the order component being acquired several years later than the causal component. The results also were in accord with predictions derived from a contextual model of children's developing understanding of terms expressing logical relationships. This model posits that the understanding of relational terms is initially context dependent, such that children can understand relational terms when they express familiar relationships, but experience difficulty in forming representations of novel relationships solely on the basis of linguistic input. The lexical components of because and so are understood during the context-dependent stage, and the transition from context-dependent to context-independent understanding does not reflect further lexical development, but rather increasing facility in dealing with decontextualized linguistic input. 相似文献
173.
174.
A general framework is proposed for accommodating the recent results of studies into ‘natural’ decision making. A crucial element of this framework is the notion of a ‘partial structure’, recently introduced into the semantic approach to scientific theories. It is through the introduction of this element that connections can be made with certain problems regarding inconsistency and rationality in general. 相似文献
175.
An improvement on Horwich's so-called pseudo-proof of Russell's principle of induction is offered, which, we believe, avoids certain objections to the former. Although strictly independent of our other work in this area, a connection can be made and in the final section we comment on this and certain questions regarding rationality, etc.The authors would like to thank the two anonymous referees and Jeff Paris for their helpful and encouraging remarks. It goes without saying, of course, that the responsibility for any further errors, ambiguities or whatever, is entirely ours.We would also like to acknowledge the support given by the Centre of Logic. Epistemology and History of Science of the University of Campinas and, in the case of French, the Brazilian Council for Scientific and Technological Development (CNPq), in the preparation of this work. 相似文献
176.
As part of the Leicester/DHSS project on microcomputer-aided assessment, 103 subjects were tested and retested on standard
and computerized versions of the Differential Aptitude Tests for Language Usage and Spelling (Forms S and T). Subjects were
generally faster on the computerized versions than on the standard versions. On the Language Usage test, subjects scored significantly
higher on the computerized than on the standard test. The correlations found between the standard and computerized versions
were modest in comparison to the original test-retest reliabilities. It is concluded that these data argue against the claim
that the current computerized versions of the tests are psychometrically parallel to the standard versions.
This research, which was carried out when the authors were at the Department of Psychology, University of Leicester, was supported
by the United Kingdom Department of Health and Social Security. 相似文献
177.
178.
Doran C French Celia A Brownell William G Graziano Willard W Hartup 《Journal of experimental child psychology》1977,24(1):1-10
Four instructional sets were employed in a study of task performance in triads of first- (age 7 years) and third-grade (age 9 years) children: promotive (equal rewards given to each participant for 12 trials); individualistic (rewards given in proportion to individual performance for 12 trials); contrient-promotive (winner take all for 6 trials followed by equal rewards for 6 trials); and contrient-individualistic (winner take all for 6 trials followed by proportional rewards for 6 trials). Performance under the promotive condition was superior to performance in the other conditions during the first half of the session. Promotive conditions improved performance during the second half of the session in triads that had received contrient instructions earlier but not to levels reached under continuous promotive conditions. Results are discussed in relation to theories of cooperation and competition. 相似文献
179.
This study compared static and dynamic balance performance of 25 subjects with Down's Syndrome and 25 without Down's Syndrome; controls were placed on CA and IQ. No significant difference between the two samples' static balance performance was noted; subjects with the Down's Syndrome had significantly superior dynamic balance performance. 相似文献
180.
A modification of the WGTA is described. It retains those features of the original apparatus which make it efficient. In addition, it provides (1) precise and largely automatic control of trial pacing and stimulus presentation, (2) simultaneous acquisition of data on problem-solving and locomotor activity of the S, (3) rapid change to any one of a wide variety of behavioral situations, and (4) thorough but quick cleaning and disinfection of the monkey cage. 相似文献