全文获取类型
收费全文 | 3769篇 |
免费 | 158篇 |
国内免费 | 3篇 |
出版年
2023年 | 22篇 |
2021年 | 36篇 |
2020年 | 50篇 |
2019年 | 71篇 |
2018年 | 95篇 |
2017年 | 107篇 |
2016年 | 123篇 |
2015年 | 69篇 |
2014年 | 113篇 |
2013年 | 413篇 |
2012年 | 177篇 |
2011年 | 170篇 |
2010年 | 111篇 |
2009年 | 99篇 |
2008年 | 141篇 |
2007年 | 170篇 |
2006年 | 143篇 |
2005年 | 166篇 |
2004年 | 148篇 |
2003年 | 142篇 |
2002年 | 129篇 |
2001年 | 66篇 |
2000年 | 62篇 |
1999年 | 56篇 |
1998年 | 80篇 |
1997年 | 66篇 |
1996年 | 43篇 |
1995年 | 32篇 |
1994年 | 54篇 |
1993年 | 46篇 |
1992年 | 44篇 |
1991年 | 32篇 |
1990年 | 26篇 |
1989年 | 37篇 |
1988年 | 37篇 |
1987年 | 30篇 |
1986年 | 23篇 |
1985年 | 29篇 |
1984年 | 43篇 |
1983年 | 45篇 |
1982年 | 45篇 |
1981年 | 35篇 |
1980年 | 31篇 |
1979年 | 31篇 |
1978年 | 47篇 |
1977年 | 22篇 |
1976年 | 37篇 |
1975年 | 26篇 |
1974年 | 29篇 |
1973年 | 21篇 |
排序方式: 共有3930条查询结果,搜索用时 22 毫秒
11.
12.
David C. Rowe Laurie Chassin Clark C. Presson Debra Edwards Steven J. Sherman 《Journal of applied social psychology》1992,22(4):261-285
The prevalence of regular smoking increases rapidly during adolescence. We applied modeling methods from the study of epidemic infectious disease to smoking behavior. Our "epidemic" models dealt with the process of transition among four states: nonsmoker (susceptible), trier (exposed), regular smoker (infected), and ex-smoker (recovered). The best fitting model was one in which the transition from nonsmoker to trier was a social contagion process where nonsmokers contacted either triers or regular smokers. All other transitions were treated as constant rate processes in which a constant proportion of eligible individuals made the transition in a given year. The recursive equation model embodying these assumptions was able to predict accurately the proportion of adolescents in each state in Grades 6–11. Our results support a "stage" model of smoking, suggesting that different psychological and physiological processes are involved in the initiation of smoking than in developing a habit of regular smoking. A possible sex difference was found in the non-contact transition between trier and smoker states, with the transition being more probable in females than in males. 相似文献
13.
14.
The multiple and long-term effects of functional communication training relative to a common reductive procedure (time-out from positive reinforcement) were evaluated. Twelve children participated in a functional analysis of their challenging behaviors (Study 1), which implicated adult attention as a maintaining variable. The children were then matched for chronological age, mental age, and language age and assigned to two groups. One group received functional communication training as an intervention for their challenging behavior, and the second group received time-out as a contrast. Both interventions were initially successful (Study 2), but durable results were achieved only with the group that received functional communication training across different stimulus conditions (Study 3). Students whose challenging behaviors were previously reduced with time-out resumed these behaviors in the presence of naive teachers unaware of the children's intervention history. The value of teaching communicative responses to promote maintenance is discussed as it relates to the concept of functional equivalence. 相似文献
15.
Item recognition requires discrimination of studied words from nonstudied words. Associative recognition requires subjects to discriminate studied word groups from recombinations of words from different groups. Cued recognition requires the same old-new discrimination as item recognition, but list items are presented as cues along with the test item. The results from three experiments show (1) little or no effect of cuing for low-frequency words, but (2) positive cuing effects for high-frequency words; (3) increasing levels of overall performance with increases in study time, but (4) unchanging effects of cuing with study time; and (5) stronger positive cuing effects for two cues than for one cue. Five models (Independent Cue Model, Matrix model, MINERVA 2, SAM, and TODAM) were fit to the data of Experiment 1. Each model has trouble with at least one aspect of the results. Theoretical implications and modifications are discussed at length. 相似文献
16.
The present study helped resolve the apparent conflict between many laboratory list-learning studies, which have not found environmental context-dependent recognition memory, and staged field studies (e.g. Malpass and Devine, 1981), whose results with ‘guided memory’ techniques suggest that eyewitness face recognition should depend upon environmental context reinstatement. It was found in two different experiments that, relative to testing in a new place, returning participants to the environment where a live staged event had occurred improved performance on identification of a confederate's face (i.e., hit rate). Although physical reinstatement improved identification performance in Experiment 1, mental reinstatement instructions to subjects tested in a new environment did not improve identification performance over an uninstructed group. The environmental reinstatement effect did not interact with test delay or confederate. In Experiment 2 it was found that environmental reinstatement improved accuracy (hit rate and foil identification rate) when the correct target was present in the test line-up, and that false identifications were not significantly affected by contextual manipulations when the correct target was absent from the line-up. The results provide an empirical basis for the hypothesis that returning to the scene of an event improves eyewitness face recognition. 相似文献
17.
Parent-tutoring procedures: Experimental analysis and validation of generalization in oral reading across passages,settings, and time 总被引:1,自引:0,他引:1
Steven F. Duvall Ph.D. Joseph C. Delquadri Ph.D. Marlene Elliott Ph.D. R. Vance Hall Ph.D. 《Journal of Behavioral Education》1992,2(3):281-303
A study that involved parents as reading tutors was carried out at home during the summer with four elementary children, three with learning disabilities. One purpose was to determine the effects of tutoring in the basal reader on reading rates at home. Another purpose was to determine potential generalization effects as a result of parent tutoring on different academic tasks at home and, later at school, on different and similar tasks. A combination multiple-baseline and reversal design tested for replication and generalization effects. Increases in correct rates were noted for the targeted variables across conditions. The results indicated that parents tutoring with school basal texts during the summer produced marked increases in reading rates that generalized at home to different academic tasks and at school to different and similar tasks. This suggests that parents, when using specific tutoring procedures, can increase their children's academic skills. 相似文献
18.
Steven French 《Synthese》1989,78(2):141-166
Faced with strong arguments to the effect that Leibniz'sPrinciple of the Identity of Indiscernibles (PII) is not a necessary truth, many supporters of the Principle have staged a strategic retreat to the claim that it is contingently true in this, the actual, world. The purpose of this paper is to examine the status of the various forms of PII in both classical and quantum physics, and it is concluded that this latter view is at best doubtful, at worst, simply wrong.I would like to thank Michael Redhead and an anonymous referee for several useful suggestions and criticisms relating to the earlier version of this paper. I must also acknowledge the support given by the Centre of Logic, Epistemology and History of Science of the University of Campinas and the Brazilian National Council for Scientific and Technological Development in the later stages of the preparation of this work. 相似文献
19.
Steven R. Smith 《Behavioral sciences & the law》1989,7(2):145-180
This article reviews the history of and basis for mental health testimony. It surveys the roles of such experts in the legal system and the concomitant problems with current approaches. Finally, it suggests specific reforms that may improve the use of mental health experts in legal proceedings. 相似文献
20.
John M. Eiler Walter W. Nelson Craig C. Jensen Steven P. Johnson 《Behavior research methods》1989,21(1):53-58
Using bar code technology to automate data collection provides a rapid and reliable alternative to paper-and-pencil tracking or keyboard entry into pocket or laptop computer. An array of bar code symbols is printed on a data menu, with a unique symbol corresponding to each possible observation. Bar code symbols are scanned using hand-held readers, which record the event, log the observation time, and store data for transfer to a personal computer. Advantages of the bar code monitoring system include: (1) ease of use by staff with minimal technical training, (2) reduced data entry errors and increased entry speed, (3) reliable portable operation, and (4) low-cost hardware. While the bar code system described here is used for behavioral monitoring in a residential treatment setting for the developmentally disabled, with minimal modification this system can be adapted for use in a wide variety of research and clinical applications. 相似文献