An Introduction to the Blockchain and Its Implications for Libraries and Medicine     

Matthew B. Hoy 《Medical reference services quarterly》2017,36(3):273-279

The blockchain is a relatively new technology used to verify and store transaction records for online cryptocurrencies like Bitcoin. The system is redundant and distributed, making it difficult for transactions to be rescinded, duplicated, or faked. Beyond online currencies, the blockchain has potential uses in health care, education, and many other fields. This column will briefly describe what the blockchain is and how it is being used, potential future uses that may be of interest to librarians and medical practitioners, and some of the problems with the system.  相似文献   

The effects of informational complexity and working memory on problem-solving efficiency     

Bobby Hoffman  Matthew T. McCrudden  Gregory Schraw  Kendall Hartley 《Asia Pacific Education Review》2008,9(4):464-474

This study investigated the influence of informational complexity and working memory capacity on problem-solving efficiency. We examined two predictions of thesituational efficiency hypothesis, which states that the efficiency of problem solving varies as a function of situational constraints. One prediction is that informational complexity affects problem-solving efficiency. A second prediction is that working memory capacity affects problem-solving efficiency. Students completed a working memory task and solved abstract and concrete syllogisms. Participants solved abstract syllogisms more accurately than concrete syllogisms and spent more time solving abstract syllogisms. Thus participants demonstrated greater problem-solving efficiency when solving concrete syllogisms. Results indicate that there is a trade-off between problem-solving accuracy and problem-solving time when information differs with respect to informational complexity, a phenomenon we refer to as theefficiency paradox. Working memory capacity did not affect accuracy or efficiency. The results support the conclusion that problem-solving efficiency is situational and a function of the complexity of information. Educational implications and directions for future research are suggested.  相似文献   

I. INTRODUCTION     

Audun Dahl  Matthew Gingo  Kevin Uttich  Elliot Turiel 《Monographs of the Society for Research in Child Development》2018,83(3):7-30

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Captain America, Tuskegee, Belmont, and Righteous Guinea Pigs: Considering Scientific Ethics through Official and Subaltern Perspectives     

Matthew Weinstein 《Science & Education》2008,17(8-9):961-975

With an eye towards a potential scientific ethics curriculum, this paper examines four contrasting discourses regarding the ethics of using human subjects in science. The first two represent official statements regarding ethics. These include the U.S.’s National Science Education Standards, that identify ethics with a professional code, and the Belmont Report, that conceptualizes ethics in three principles to guide research oversight boards. Contrasting this view of ethics as decorum and practice in line with a priori principles is the conception of ethics from unofficial sources representing populations who have been human subjects. The first counter-discourse examined comes from Guinea Pig Zero, an underground magazine for professional human subjects. Here ethics emerges as a question of politics over principle. The good behavior of the doctors and researchers is an effect of the politics and agency of the communities that supply science with subjects. The second counter-discourse is a comic book called Truth, which tells the story of Black soldiers who were used as guinea pigs in World War II. Ethics is both more political and more uncertain in this narrative. Science is portrayed as complicit with the racism of NAZI Germany; at the same time, and in contrast to the professional guinea pigs, neither agency nor politics are presented as effective tools for forcing the ethical conduct of the scientific establishment. The conclusion examines the value of presenting all of these views of scientific ethics in science education.  相似文献   

The physical activity levels of preschool-aged children: A systematic review     

Patricia Tucker 《Early childhood research quarterly》2008

This systematic review presents research on the physical activity levels of preschool-aged children (aged 2–6 years). Thirty-nine primary studies (published 1986–2007) representing a total of 10,316 participants (5236 male and 5080 female), from seven countries are described and the physical activity behaviors of this population are considered in accordance with the National Association for Sport and Physical Education (NASPE) physical activity guidelines for preschoolers. Upon review of the evidence, it is apparent that nearly half of preschool-aged children do not engage in sufficient physical activity. Current recommendations suggest a minimum of 60 min of physical activity per day; only 54% of participants throughout the studies achieved this. Furthermore, as with other age groups, boys participate in considerably more physical activity than girls. It is clear from this systematic review that nearly half of children studied are not meeting the recommended guidelines for physical activity. Therefore, effective interventions that promote and foster physical activity in children are necessary, especially in females. However, a more objective physical activity guideline for preschoolers is necessary; measurement of activity needs to become more unified to compare and track activity more effectively.  相似文献   

Orthographic learning and transfer of complex words: insights from eye tracking during reading and learning tasks     

Emilie Ginestet  Jalyssa Shadbolt  Rebecca Tucker  Marie‐Line Bosse  S. Hlne Deacon 《Journal of Research in Reading》2021,44(1):51-69

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Effect of acquisition rates on off‐task behavior of kindergarten students while learning sight words     

Matthew K. Burns  Lisa N. Aguilar  Kristy Warmbold‐Brann  June L. Preast  Crystal N. Taylor 《Psychology in the schools》2021,58(1):5-17

Assessing a student's acquisition rates (ARs) is a reliable way to determine how many new words should be taught in one lesson without reducing retention. Exceeding a student's AR can result in frustration and problem behaviors. The purpose of this study was to examine the effect of AR on the off‐task behavior of kindergarten students while participating in a commonly used sight‐word instruction video. Participants included 39 kindergarten students whose ARs were assessed before showing the sight‐word video. Behavior was measured as on‐ and off‐task using momentary time‐sampling with 10‐s intervals. Results indicated that students' time off task increased after exceeding their ARs, with a noticeable immediate increase. The implications and limitations of these results are discussed.  相似文献   

Examining the Psychometric Properties of a New Integrative Learning Scale     

Youngerman  Ethan  Dahl  Laura S.  Mayhew  Matthew J. 《Research in higher education》2021,62(6):829-854

Research in Higher Education - Integrative learning is the ability to connect, apply, and/or synthesize. A highly valued skill for the knowledge economy and combating false narratives, integrative...  相似文献   

"An expedition to heal the wounds of war". The 1919 eclipse and Eddington as Quaker adventurer     

Stanley M 《Isis; an international review devoted to the history of science and its cultural influences》2003,94(1):57-89

The 1919 eclipse expedition's confirmation of general relativity is often celebrated as a triumph of scientific internationalism. However, British scientific opinion during World War I leaned toward the permanent severance of intellectual ties with Germany. That the expedition came to be remembered as a progressive moment of internationalism was largely the result of the efforts of A. S. Eddington. A devout Quaker, Eddington imported into the scientific community the strategies being used by his coreligionists in the national dialogue: humanize the enemy through personal contact and dramatic projects that highlight the value of peace and cooperation. The essay also addresses the common misconception that Eddington's sympathy for Einstein led him intentionally to misinterpret the expedition's results. The evidence gives no reason to think that Eddington or his coworkers were anything but rigorous. Eddington's pacifism is reflected not in manipulated data but in the meaning of the expedition and the way it entered the collective memory as a celebration of international cooperation in the wake of war.  相似文献   

Remembering Gregg Schraw     

McCrudden  Matthew T. 《Educational Psychology Review》2016,28(4):673-690

Educational Psychology Review -  相似文献