全文获取类型
收费全文 | 1311篇 |
免费 | 144篇 |
国内免费 | 251篇 |
专业分类
1706篇 |
出版年
2024年 | 3篇 |
2023年 | 37篇 |
2022年 | 40篇 |
2021年 | 61篇 |
2020年 | 68篇 |
2019年 | 70篇 |
2018年 | 65篇 |
2017年 | 73篇 |
2016年 | 73篇 |
2015年 | 66篇 |
2014年 | 76篇 |
2013年 | 193篇 |
2012年 | 45篇 |
2011年 | 45篇 |
2010年 | 43篇 |
2009年 | 59篇 |
2008年 | 56篇 |
2007年 | 66篇 |
2006年 | 74篇 |
2005年 | 67篇 |
2004年 | 64篇 |
2003年 | 36篇 |
2002年 | 37篇 |
2001年 | 28篇 |
2000年 | 24篇 |
1999年 | 22篇 |
1998年 | 26篇 |
1997年 | 22篇 |
1996年 | 18篇 |
1995年 | 17篇 |
1994年 | 21篇 |
1993年 | 11篇 |
1992年 | 13篇 |
1991年 | 4篇 |
1990年 | 5篇 |
1989年 | 8篇 |
1988年 | 5篇 |
1987年 | 5篇 |
1986年 | 11篇 |
1985年 | 8篇 |
1984年 | 4篇 |
1983年 | 7篇 |
1982年 | 5篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1979年 | 5篇 |
1978年 | 5篇 |
1977年 | 4篇 |
1976年 | 3篇 |
1975年 | 2篇 |
排序方式: 共有1706条查询结果,搜索用时 15 毫秒
61.
Jiin-huarng Guo Wei-ming Luh 《The British journal of mathematical and statistical psychology》2020,73(2):316-332
The equality of two group variances is frequently tested in experiments. However, criticisms of null hypothesis statistical testing on means have recently arisen and there is interest in other types of statistical tests of hypotheses, such as superiority/non-inferiority and equivalence. Although these tests have become more common in psychology and social sciences, the corresponding sample size estimation for these tests is rarely discussed, especially when the sampling unit costs are unequal or group sizes are unequal for two groups. Thus, for finding optimal sample size, the present study derived an initial allocation by approximating the percentiles of an F distribution with the percentiles of the standard normal distribution and used the exhaustion algorithm to select the best combination of group sizes, thereby ensuring the resulting power reaches the designated level and is maximal with a minimal total cost. In this manner, optimization of sample size planning is achieved. The proposed sample size determination has a wide range of applications and is efficient in terms of Type I errors and statistical power in simulations. Finally, an illustrative example from a report by the Health Survey for England, 1995–1997, is presented using hypertension data. For ease of application, four R Shiny apps are provided and benchmarks for setting equivalence margins are suggested. 相似文献
62.
63.
The lexical–semantic organization of the mental lexicon is bound to change across the lifespan. Nevertheless, the effects of lexical–semantic factors on word processing are usually based on studies enrolling young adult cohorts. The current study aims to investigate to what extent age-specific semantic organization predicts performance in referential word production over the lifespan, from school-age children to older adults. In Study 1, we conducted a free semantic association task with participants from six age-groups (ranging from 10 to 80 years old) to compute measures that capture age-specific properties of the mental lexicon across the lifespan. These measures relate to lifespan changes in the Available Richness of the mental lexicon and in the lexical–semantic Network Prototypicality of concrete words. In Study 2, we used the collected data to predict performance in a picture-naming task on a new group of participants within the same age-groups as for Study 1. The results show that age-specific semantic Available Richness and Network Prototypicality affect word production speed while the semantic variables collected only in young adults do not. A richer and more prototypical semantic network across subjects from a given age-group is associated with faster word production speed. The current results indicate that age-specific semantic organization is crucial to predict lexical–semantic behaviors across the lifespan. Similarly, these results also provide cues to the understanding of the lexical–semantic properties of the mental lexicon and to lexical selection in referential tasks. 相似文献
64.
Viridiana L. Benitez Federica Bulgarelli Krista Byers‐Heinlein Jenny R. Saffran Daniel J. Weiss 《Developmental science》2020,23(2)
Language acquisition depends on the ability to detect and track the distributional properties of speech. Successful acquisition also necessitates detecting changes in those properties, which can occur when the learner encounters different speakers, topics, dialects, or languages. When encountering multiple speech streams with different underlying statistics but overlapping features, how do infants keep track of the properties of each speech stream separately? In four experiments, we tested whether 8‐month‐old monolingual infants (N = 144) can track the underlying statistics of two artificial speech streams that share a portion of their syllables. We first presented each stream individually. We then presented the two speech streams in sequence, without contextual cues signaling the different speech streams, and subsequently added pitch and accent cues to help learners track each stream separately. The results reveal that monolingual infants experience difficulty tracking the statistical regularities in two speech streams presented sequentially, even when provided with contextual cues intended to facilitate separation of the speech streams. We discuss the implications of our findings for understanding how infants learn and separate the input when confronted with multiple statistical structures. 相似文献
65.
66.
67.
68.
69.
考察了4至5岁儿童的现实性监测在延时0天、3天和7天条件下的成绩。结果发现:对真实动作的源混淆更多地发生在延时3-7天,而对想象动作的源混淆更多地发生在0-3天,且对想象动作的现实性监测比对真实动作的现实性监测更早达到随机水平。这表明事件在现实性监测的时间效应中存在不同的特点。 相似文献
70.
讨论了词语使用过程中视觉使用频率和听觉使用频率的区分。通过两个实验对听觉使用频率进行了探讨。实验一通过量表评定法得到了两组视觉使用频率相同,但听觉使用频率不同的双字词,实验二利用实验一得到的两组双字词对被试进行了记忆测验,在单一的听觉条件下,发现在自由回忆,听觉再认和模糊辨听这两类不同的记忆测验中出现了实验性分离现象;反映了听觉使用频率自身的一些特征。 相似文献