全文获取类型
收费全文 | 2224篇 |
免费 | 80篇 |
专业分类
2304篇 |
出版年
2021年 | 16篇 |
2020年 | 32篇 |
2019年 | 34篇 |
2018年 | 56篇 |
2017年 | 58篇 |
2016年 | 49篇 |
2015年 | 48篇 |
2014年 | 50篇 |
2013年 | 219篇 |
2012年 | 90篇 |
2011年 | 91篇 |
2010年 | 49篇 |
2009年 | 56篇 |
2008年 | 81篇 |
2007年 | 81篇 |
2006年 | 90篇 |
2005年 | 64篇 |
2004年 | 60篇 |
2003年 | 66篇 |
2002年 | 64篇 |
2001年 | 36篇 |
2000年 | 36篇 |
1999年 | 51篇 |
1998年 | 37篇 |
1997年 | 39篇 |
1996年 | 45篇 |
1995年 | 30篇 |
1994年 | 33篇 |
1993年 | 39篇 |
1992年 | 23篇 |
1991年 | 24篇 |
1990年 | 28篇 |
1989年 | 23篇 |
1988年 | 27篇 |
1987年 | 30篇 |
1986年 | 23篇 |
1985年 | 25篇 |
1984年 | 25篇 |
1983年 | 27篇 |
1982年 | 42篇 |
1981年 | 30篇 |
1980年 | 29篇 |
1979年 | 34篇 |
1978年 | 24篇 |
1977年 | 24篇 |
1976年 | 27篇 |
1975年 | 24篇 |
1974年 | 16篇 |
1973年 | 15篇 |
1969年 | 15篇 |
排序方式: 共有2304条查询结果,搜索用时 15 毫秒
821.
822.
Fitts DA 《Behavior research methods》2010,42(4):918-929
The variable-criteria sequential stopping rule (SSR) is a method for conducting planned experiments in stages after the addition
of new subjects until the experiment is stopped because the p value is less than or equal to a lower criterion and the null hypothesis has been rejected, the p value is above an upper criterion, or a maximum sample size has been reached. Alpha is controlled at the expected level.
The table of stopping criteria has been validated for a t test or ANOVA with four groups. New simulations in this article demonstrate that the SSR can be used with unequal sample
sizes or heterogeneous variances in a t test. As with the usual t test, the use of a separate-variance term instead of a pooled-variance term prevents an inflation of alpha with heterogeneous
variances. Simulations validate the original table of criteria for up to 20 groups without a drift of alpha. When used with
a multigroup ANOVA, a planned contrast can be substituted for the global F as the focus for the stopping rule. The SSR is recommended when significance tests are appropriate and when the null hypothesis
can be tested in stages. Because of its efficiency, the SSR should be used instead of the usual approach to the t test or ANOVA when subjects are expensive, rare, or limited by ethical considerations such as pain or distress. 相似文献
823.
Douglas Walton 《Journal of Applied Logic》2010,8(1):1-21
In this paper, several examples from the literature, and one central new one, are used as case studies of texts of discourse containing an argumentation scheme that has now been widely investigated in literature on argumentation. Argumentation schemes represent common patterns of reasoning used in everyday conversational discourse. The most typical ones represent defeasible arguments based on nonmonotonic reasoning. Each scheme has a matching set of critical questions used to evaluate a particular argument fitting that scheme. The project is to study how to build a formal computational model of this scheme for the circumstantial ad hominem argument using argumentation tools and systems developed in artificial intelligence. It is shown how the formalization built using these tools is applicable to the tasks of identification, analysis and evaluation of the central case studied. One important implication of the work is that it provides a foundational basis for showing how other argumentation schemes can be formalized. 相似文献
824.
Kenneth Heller Douglas B. Alexander Margaret Gatz Bob G. Knight Tara Rose 《Journal of applied social psychology》2005,35(2):399-422
Panel data collected in 1991 as part of the University of Southern California Longitudinal Study of Generations (LSOG) were used to predict reported preparation activities prior to and in response to the 1994 Northridge, California, earthquake. In late 1994 and early 1995, 163 panelists (representing 107 multigenerational families) were interviewed by phone about their earthquake experiences. The best 1991 predictor of pre‐quake preparation was the extent of instrumental support respondents provided to network members. Earthquake preparation activities undertaken after the quake were associated with the amount and cost of damage experienced during the quake, 1991 neuroticism scores, age (inversely), and having preparedness encouraged by multiple network sources. The results highlight the importance of social roles (e.g., support provision) and discussion by informal network sources in the adoption of public health and safety messages. 相似文献
825.
Chet Robie Douglas J. Brown William J. Shepherd 《International Journal of Selection & Assessment》2005,13(4):274-281
In this study, we investigated the moderating role of interdependence (a personality trait that measures the extent to which individuals desire working in a group‐based, cooperative setting) on the relationship between competitiveness and one‐year objective sales performance. On the basis of data from 133 sales representatives, results indicated that: (a) competitiveness was related to objective sales performance; and (b) interdependence moderated the relationship between competitiveness and objective sales performance such that competitiveness predicted objective sales performance more strongly for those who scored low in interdependence versus those who scored high in interdependence. Implications for sales selection and reward systems and directions for future research are considered. 相似文献
826.
Douglas Walton 《Synthese》2006,152(2):237-284
This paper addresses the problem posed by the current split between the two opposed hypotheses in the growing literature on the fallacy of begging the question the epistemic hypothesis, based on knowledge and belief, and the dialectical one, based on formal dialogue systems. In the first section, the nature of split is explained, and it is shown how each hypothesis has developed. To get the beginning reader up to speed in the literature, a number of key problematic examples are analyzed illustrating how both approaches can be applied. Useful tools are brought to bear on them, including the automated argument diagramming system Araucaria, and profiles of dialogue used to represent circular argumentation in a dialogue tableau format. These tools are used to both to model circular reasoning and to provide the contextual evidence needed to properly determine whether the circular reasoning in a given case is better judged fallacious or not. A number of technical problems that have impeded the development of both hypotheses are studied. One central problem is the distinction between argument and explanation. It is concluded that the best way to move forward and solve these problems is to reformulate the two hypotheses in such a way that they might be able to co-exist. On this basis, a unified methodology is proposed that allows each hypothesis to move forward as a legitimate avenue for research using the same tools. 相似文献
827.
Douglas C. Breunlin Rocco A. Cimmarusti Joshua S. Hetherington Jayne Kinsman 《Journal of Family Therapy》2006,28(3):246-266
This paper reports on a school‐based intervention in which a family therapist, serving as a consultant to a high school, worked with that school to reduce the level of school‐based violence. The primary intervention reported in this paper is a conflict skills training programme called ‘Making the Smart Choice’. While designed for the families of students suspended for physical violence, this intervention also impacts upon the school's disciplinary system and the climate of the school itself. The context or responses to school‐based violence, the strategy to gain access to the school, the politics of developing such a programme, the programme itself and the infrastructure needed to maintain it are described. For four years, suspensions for school‐based violence were halved compared to the four years prior to the start of the programme. 相似文献
828.
Kristyn A. Scott Douglas J. Brown 《Organizational behavior and human decision processes》2006,101(2):230-242
In the current paper we investigate whether gender affects the encoding of leadership behavior. In three studies we found evidence that perceivers had difficulty encoding leadership behaviors into their underlying prototypical leadership traits when the behavior implied an agentic trait and the behavior was enacted by a female. Using a lexical decision making task, in Study 1 we demonstrated that agentic leadership traits were less accessible than communal leadership traits when the leader was female. Additionally, Study 1 also demonstrated that agentic traits were less accessible when the leader was female versus male. In Studies 2a and 2b, we replicated the differences we found for agentic leadership behaviors using perceiver’s self-ratings as the dependent variable. Results are discussed both in terms of their implications for future research on gender bias in leadership and their practical implications for eliminating gender bias against females who aspire to leadership positions. 相似文献
829.
Douglas Cairns 《Frontiers of Philosophy in China》2019,14(1):75
The notion of timê (τιμή, normally translated “honour”) is a key concept when it comes to thinking about virtues, roles, and duties in ancient Greek ethics and society, both in popular and in philosophical terms. This discussion concentrates on the work of the fifth-century historian, Herodotus, where the idea of timê as the fulfilment of a specific role in society takes on particular and interesting inflections. In Herodotus, as in Greek generally, timê covers both the esteem that one receives from others and the claim to esteem that the individual him- or herself brings to bear in social interaction. Thus timê is both “deference” and “demeanour” (to use Goffman’s terminology). As a quality of an individual that commands others’ respect, timê also encompasses the roles that are bound up with one’s status. Roles and offices express, attract, and demand timê, but such demands are normally constrained by reciprocal respect for the timê of others. The office of the Persian king, however, appears at first sight to involve unconditional claims to recognition respect, powerful drives towards appraisal respect (in Darwall’s terminology), and only limited acknowledgement of either ethical norms or others claims as potential limitations to regal self-assertion. Closer inspection, however, reveals that the values of mutual respect that underpin the freedom enjoyed by citizens of Greek poleis are also felt by Herodotus to ground claims to freedom and independence on the part of those poleis themselves, claims that the historian’s narrative suggests are ultimately upheld by the gods and embedded in the structure of the cosmos itself. 相似文献
830.
Douglas MacCutcheon Anders Hurtig Florian Pausch Staffan Hygge Janina Fels Robert Ljung 《Journal of Cognitive Psychology》2019,31(2):175-185
The acoustic qualities of a room can have a deleterious effect on the quality of speech signals. The acoustic measurement of reverberation time (RT) has shown to impact second language (L2) speech comprehension positively when lower due to release from spectral and temporal masking effects as well as top-down processing factors. This auralization experiment investigated the benefits of better L2 vocabulary and executive function (updating) skills during L2 listening comprehension tests under shorter versus longer RT conditions (0.3 and 0.9?s). 57 bilingual university students undertook L2 vocabulary, number updating and L2 listening comprehension tests. After splitting groups into high/low vocabulary and updating groups, a mixed ANOVA was conducted. The high number updating group showed no significant differences or interactions in L2 listening comprehension than the lower number updating group across RT conditions. The high vocabulary group had 22% better L2 listening comprehension than the low vocabulary group in long RT, and 9% better in short RT. A significant benefit in L2 listening comprehension due to release from reverberation was only evident in the high vocabulary group. Results indicate that the benefit of good room acoustics for listening comprehension is greatest for those with better language (vocabulary) ability. 相似文献