全文获取类型
收费全文 | 2830篇 |
免费 | 82篇 |
国内免费 | 2篇 |
出版年
2021年 | 14篇 |
2020年 | 33篇 |
2019年 | 52篇 |
2018年 | 72篇 |
2017年 | 59篇 |
2016年 | 65篇 |
2015年 | 50篇 |
2014年 | 56篇 |
2013年 | 353篇 |
2012年 | 103篇 |
2011年 | 94篇 |
2010年 | 76篇 |
2009年 | 64篇 |
2008年 | 87篇 |
2007年 | 103篇 |
2006年 | 93篇 |
2005年 | 98篇 |
2004年 | 105篇 |
2003年 | 89篇 |
2002年 | 93篇 |
2001年 | 46篇 |
2000年 | 41篇 |
1999年 | 52篇 |
1998年 | 52篇 |
1997年 | 34篇 |
1996年 | 61篇 |
1995年 | 51篇 |
1994年 | 53篇 |
1993年 | 48篇 |
1992年 | 50篇 |
1991年 | 34篇 |
1990年 | 39篇 |
1989年 | 39篇 |
1988年 | 33篇 |
1987年 | 37篇 |
1986年 | 34篇 |
1985年 | 48篇 |
1984年 | 33篇 |
1983年 | 44篇 |
1982年 | 39篇 |
1981年 | 31篇 |
1980年 | 31篇 |
1979年 | 19篇 |
1978年 | 25篇 |
1977年 | 22篇 |
1976年 | 18篇 |
1975年 | 16篇 |
1974年 | 22篇 |
1973年 | 17篇 |
1971年 | 11篇 |
排序方式: 共有2914条查询结果,搜索用时 625 毫秒
891.
Effects of signaled and unsignaled alternative reinforcement on persistence and relapse in children and pigeons
下载免费PDF全文
![点击此处可从《Journal of the experimental analysis of behavior》网站下载免费的PDF全文](/ch/ext_images/free.gif)
John A. Nevin F. Charles Mace Iser G. DeLeon Timothy A. Shahan Kenneth D. Shamlian Keith Lit Tara Sheehan Michelle A. Frank‐Crawford Stephanie L. Trauschke Mary M. Sweeney Danielle R. Tarver Andrew R. Craig 《Journal of the experimental analysis of behavior》2016,106(1):34-57
Three experiments explored the impact of different reinforcer rates for alternative behavior (DRA) on the suppression and post‐DRA relapse of target behavior, and the persistence of alternative behavior. All experiments arranged baseline, intervention with extinction of target behavior concurrently with DRA, and post‐treatment tests of resurgence or reinstatement, in two‐ or three‐component multiple schedules. Experiment 1, with pigeons, arranged high or low baseline reinforcer rates; both rich and lean DRA schedules reduced target behavior to low levels. When DRA was discontinued, the magnitude of relapse depended on both baseline reinforcer rate and the rate of DRA. Experiment 2, with children exhibiting problem behaviors, arranged an intermediate baseline reinforcer rate and rich or lean signaled DRA. During treatment, both rich and lean DRA rapidly reduced problem behavior to low levels, but post‐treatment relapse was generally greater in the DRA‐rich than the DRA‐lean component. Experiment 3, with pigeons, repeated the low‐baseline condition of Experiment 1 with signaled DRA as in Experiment 2. Target behavior decreased to intermediate levels in both DRA‐rich and DRA‐lean components. Relapse, when it occurred, was directly related to DRA reinforcer rate as in Experiment 2. The post‐treatment persistence of alternative behavior was greater in the DRA‐rich component in Experiment 1, whereas it was the same or greater in the signaled‐DRA‐lean component in Experiments 2 and 3. Thus, infrequent signaled DRA may be optimal for effective clinical treatment. 相似文献
892.
893.
ENFOLDING VIOLENCE,UNFOLDING HOPE: EMERGING CLOUDS OF POSSIBILITY FOR WOMEN IN ROMAN CATHOLICISM
下载免费PDF全文
![点击此处可从《Zygon》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Colleen Mary Carpenter 《Zygon》2016,51(3):797-808
In an effort to think through possible impossibilities, and enfold current problems within Catholicism into the luminous darkness of the cloud of the im/possible, this response to Catherine Keller's Cloud of the Impossible considers what might happen should Keller's cloud of mindful unknowing and nonseparable difference billow over and through one particular Catholic conundrum: how to respond to the terrifying reality of domestic violence in the context of a marriage defined as indissoluble, imperishable—inescapable. 相似文献
894.
Debajyoti Palai A. Carmel Mary Esther Deeksha Porwal Maurya Sandeep Pradeepkumar D. Raghavendra Kumar 《Philosophical Magazine Letters》2016,96(11):440-446
Vanadium oxide films, deposited on aluminium (Al), titanium (Ti) and tantalum (Ta) metal substrates by pulsed RF magnetron sputtering at a working pressure of 1.5 x10?2 mbar at room temperature are found to display mixed crystalline vanadium oxide phases viz., VO2, V2O3, V2O5. The films have been characterized by field-emission scanning electron microscopy, X-ray diffraction, differential scanning calorimetry (DSC) and X-ray photoelectron spectroscopy, and their thermo-optical and electrical properties have been investigated. Studies of the deposited films by DSC have revealed a reversible-phase transition found in the temperature range of 45–49 °C. 相似文献
895.
In two experiments, subjects trained in data entry, typing one 4-digit number at a time. At training, subjects either typed the numbers immediately after they appeared (immediate) or typed the previous number from memory while viewing the next number (delayed). In Experiment 2 stimulus presentation time was limited and either nothing or a space (gap) was inserted between the second and third digits. In both experiments after training, all subjects completed a test with no gap and typed numbers immediately. Training with a memory load improved speed across training blocks (Experiment 1) and eliminated the decline in accuracy across training blocks (Experiment 2), thus serving as a cognitive antidote to performance decrements. An analysis of each keystroke revealed different underlying processes and strategies for the two training conditions, including when encoding took place. Chunking (in which the first and last two digits are treated separately) was more evident in the immediate than in the delayed condition and was exaggerated with a gap, even at test when there was no gap. These results suggest that such two-digit chunking is due to stimulus encoding and motor planning processes as well as memory, and those processes transferred from training to testing. 相似文献
896.
897.
Samuel B. Green Yanyun Yang Mary Alt Shara Brinkley Shelley Gray Tiffany Hogan Nelson Cowan 《Psychonomic bulletin & review》2016,23(3):750-763
Reliabilities of scores for experimental tasks are likely to differ from one study to another to the extent that the task stimuli change, the number of trials varies, the type of individuals taking the task changes, the administration conditions are altered, or the focal task variable differs. Given that reliabilities vary as a function of the design of these tasks and the characteristics of the individuals taking them, making inferences about the reliability of scores in an ongoing study based on reliability estimates from prior studies is precarious. Thus, it would be advantageous to estimate reliability based on data from the ongoing study. We argue that internal consistency estimates of reliability are underutilized for experimental task data and in many applications could provide this information using a single administration of a task. We discuss different methods for computing internal consistency estimates with a generalized coefficient alpha and the conditions under which these estimates are accurate. We illustrate use of these coefficients using data for three different tasks. 相似文献
898.
Mary Joyce D. Juan Moin Syed Margarita Azmitia 《Identity: An International Journal of Theory and Research》2016,16(4):225-238
Theoretical writings on intersectionality have long emphasized the unique ways women of color experience race/ethnicity and gender, particularly compared to White women; however, little empirical evidence exists in support of this claim. This mixed-methods study adds to the empirical base by comparing and contrasting these experiences among women of color and White women. In a sample of 47 women of color and 18 White women, there were significant racial/ethnic differences in terms of (a) the perceived connection of race/ethnicity and gender, (b) the social contexts in which gender becomes salient, and (c) the meaningfulness of the intersection of race/ethnicity and gender. The findings lend empirical support for intersectionality as a useful psychological framework for understanding multiple social identities. 相似文献
899.
Robert A. Pearlman Mary Beth Foglia Ellen Fox Jennifer H. Cohen Barbara L. Chanko Kenneth A. Berkowitz 《The American journal of bioethics : AJOB》2016,16(3):3-14
Although ethics consultation is offered as a clinical service in most hospitals in the United States, few valid and practical tools are available to evaluate, ensure, and improve ethics consultation quality. The quality of ethics consultation is important because poor quality ethics consultation can result in ethically inappropriate outcomes for patients, other stakeholders, or the health care system. To promote accountability for the quality of ethics consultation, we developed the Ethics Consultation Quality Assessment Tool (ECQAT). ECQAT enables raters to assess the quality of ethics consultations based on the written record. Through rigorous development and preliminary testing, we identified key elements of a quality ethics consultation (ethics question, consultation-specific information, ethical analysis, and conclusions and/or recommendations), established scoring criteria, developed training guidelines, and designed a holistic assessment process. This article describes the development of the ECQAT, the resulting product, and recommended future testing and potential uses for the tool. 相似文献
900.