全文获取类型
收费全文 | 5596篇 |
免费 | 248篇 |
专业分类
5844篇 |
出版年
2023年 | 42篇 |
2022年 | 30篇 |
2021年 | 46篇 |
2020年 | 110篇 |
2019年 | 111篇 |
2018年 | 149篇 |
2017年 | 146篇 |
2016年 | 202篇 |
2015年 | 139篇 |
2014年 | 124篇 |
2013年 | 609篇 |
2012年 | 256篇 |
2011年 | 318篇 |
2010年 | 187篇 |
2009年 | 220篇 |
2008年 | 240篇 |
2007年 | 285篇 |
2006年 | 222篇 |
2005年 | 218篇 |
2004年 | 230篇 |
2003年 | 230篇 |
2002年 | 200篇 |
2001年 | 109篇 |
2000年 | 98篇 |
1999年 | 102篇 |
1998年 | 105篇 |
1997年 | 79篇 |
1996年 | 79篇 |
1995年 | 76篇 |
1994年 | 85篇 |
1993年 | 55篇 |
1992年 | 71篇 |
1991年 | 42篇 |
1990年 | 51篇 |
1989年 | 31篇 |
1988年 | 23篇 |
1987年 | 37篇 |
1986年 | 35篇 |
1985年 | 37篇 |
1984年 | 33篇 |
1983年 | 51篇 |
1982年 | 41篇 |
1981年 | 32篇 |
1980年 | 29篇 |
1979年 | 39篇 |
1978年 | 44篇 |
1977年 | 27篇 |
1976年 | 28篇 |
1974年 | 13篇 |
1973年 | 13篇 |
排序方式: 共有5844条查询结果,搜索用时 31 毫秒
1.
Although perceived health risk plays a prominent role in theories of health behavior, its empirical role in risk taking is less clear. In Study 1 (N = 129), 2 measures of drivers' risk-taking behavior were found to be unrelated to self-estimates of accident concern but to be related to self-ratings of driving skill and the perceived thrill of driving. In Study 2 (N = 405), out of a wide range of potential influences, accident concern had the weakest relationship with risk taking. The authors concluded that although health risk is a key feature in many theories of health behavior and a central focus for researchers and policy makers, it may not be such a prominent factor for those actually taking the risk. 相似文献
2.
3.
4.
Suicides among older adults in the United States and Canada in the last decade have accounted for an increasing share of all suicides. In both countries the use of firearms among older adults has steadily increased. Despite these trends, little is known about the extent to which crisis centers are prepared to prevent elder suicide. A survey of AAS-listed crisis prevention centers examined the training, knowledge, and current practices relevant to elder suicide among personnel in 321 crisis prevention centers in both countries. Results revealed insufficient training, a lack of familiarity with recent suicide trends, and limited outreach to older adults. 相似文献
5.
Cyril Latimer Catherine Stevens Mark Irish Leanne Webber 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2000,53(3):765-791
This paper reports the operation of robust attentional bias to the top and right during perception of small, single geometric forms. Same/different judgements of successively presented standard and comparison forms are faster when local differences are located at top and right rather than in other regions of the forms. The bias persists when form size is reduced to approximately one degree of visual angle, and it is unaffected by saccadic eye movements and by instructions to attend to other reliably differentiating regions of the forms. Results lend support in various degrees to two of the possible explanations of the bias: (1) a static, skewed distribution of attentional resources around eye fixation; and (2) biased, covert scanning that commences invariably at the top and right of stim ulus forms. Origins of the bias in terms of possible left-hemispheric capacity for constructing representations of visual stimuli from parts, as well as in terms of reading experience and prevailing optic flow during locomotion through space are considered. Recent investigations of conditions under which the bias can be maintained or reduced are mentioned. 相似文献
6.
7.
8.
Anthony J. Cuvo Paula K. Davis Mark F. O'Reilly Brenda M. Mooney Ruth Crowley 《Journal of applied behavior analysis》1992,25(2):477-489
We assessed whether written task analyses would serve as textual prompts for performing functional tasks by persons with mild disabilities. Several variables that could influence the effectiveness of textual prompts to promote stimulus control were examined across four groups. A consistent finding was that written specific task analyses combined with end-of-trial performance feedback were effective for promoting the acquisition and generalization of several tasks. Performance transferred immediately to natural discriminative stimuli when the written task analyses and feedback were withdrawn for most tasks and participants. For 2 participants, transfer of stimulus control was accomplished by prompt fading, using individualized written task analyses either with or without performance feedback (Group 1). When feedback was not provided, the effectiveness of written specific task analyses was inconsistent across groups. In contrast to the controlling effects of written specific task analyses, written generic task analyses, which specified only major task outcomes, when combined with performance feedback (Group 1) did not control responding. Overall, this research demonstrated the effectiveness of written specific task analyses and performance feedback to promote stimulus control for persons with mild disabilities. 相似文献
9.
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
10.
Mark R. Wiederanders 《Behavioral sciences & the law》1992,10(1):141-148
Postinstitutional arrests and state hospitalizations of 191 patients placed on conditional release (CONREP group) were compared to those of 44 patients released from the same California state hospital with no aftercare due to expiration of commitment terms (MAXOUT group). The two groups were not randomly determined but were comparable in demographic characteristics and rates of preprogram arrest. The CONREP group had a significantly lower community-period arrest rate than did the MAXOUT group (p <.001). Survival rate analyses, using time until arrest and time until revocation as dependent variables, suggested that revocations during the first 240 days of community re-entry reduced the potential arrest rate within the CONREP group. Results were discussed in terms of the “criminalization hypothesis” as well as the crime-preventive possibilities of the conditional release mechanism. 相似文献