Risk-taking in explanation of biological events

Risk-taking by biology students as they attempt to explain observed biological events was investigated. The dependent variable, risk-taking as measured by the Extremity-Confidence of Hypothesis Test and the Risk-Taking Verbal Observation Scale, was analyzed within 2 × 2 and 2 × 3 factorial designs. The independent variables consisted of two levels of achievement motivation and status of information, and three levels of group arrangement for discussion. The results indicate that verbal risk-taking is influenced by differential knowledge of the information and the composition of a discussion group based on the members' measured achievement motivation. No differences were noted in the comparison groups on risk-taking as measured by the Extremity-Confidence of Hypothesis Test. A significant, but low, positive correlation was found to exist between IQ and risk-taking in verbal discourse by individuals. Based on the results of this study, the suggestion that risk-taking is a multidimensional trait is supported, and the magnitude of its expression may be influenced by differential treatments.     

Protective role of onion against acute alcoholic fatty liver

Rats were fasted for 8 hours and then fed 3 ml of 25% (v/v) ethanol per 100g body weight and subsequently sacrificed 18 hours later. The levels of triacylglycerols and total cholesterol were significantly raised in serum and liver of alcohol fed rats. However, when rats were fed on aqucous extract of onions (300 mg per 100g body weight) with 25% ethanol, no rise in serum and liver lipids was observed. Alcohol fed to the fats with or without onion extract had no effect on serum, AST, ALT and alkaline phosphatase levels. The increase in serum urea in ethanol-fed rats was not altered in rats fed a mixture of alcohol and onion extracts. Values of liver MDA was lower in rats fed ethanol with or without onion extract compared to controls. Onion extract seemed to show a hypolipidemic effect in alcohol fed rats.     

一致的温柔

要玩温柔游戏了.先设计好各自的动作。不要商量噢!游戏目的1.逐步加深孩子对温柔一词的理解。2.全家温柔品格的塑造和日常生活的实践。3.增进亲子感情,促进家庭和谐。     

College student drug usage in a state system as a function of type of institution

Over 4,500 students from 28 universities, colleges, and junior colleges constituting a state system of higher education were compared on extent of drug use. At least two of the three pairs of groups differed on reported usage of six of the substances, with the largest differences being between universities and junior colleges on alcohol and marihuana. A discriminant analysis showed that the nine items formed two differentiating dimensions—Alcohol Usage and Hallucinogen/LSD Usage—in separating the groups. Despite the statistical significance, the differences in terms of actual numbers of users were small. Inferences of the results are discussed.     

Online teaching tool simplifies faculty use of multimedia and improves student interest and knowledge in science

Digital technologies can improve student interest and knowledge in science. However, researching the vast number of websites devoted to science education and integrating them into undergraduate curricula is time-consuming. We developed an Adobe ColdFusion- and Adobe Flash-based system for simplifying the construction, use, and delivery of electronic educational materials in science. The Online Multimedia Teaching Tool (OMTT) in Neuroscience was constructed from a ColdFusion-based online interface, which reduced the need for programming skills and the time for curriculum development. The OMTT in Neuroscience was used by faculty to enhance their lectures in existing curricula. Students had unlimited online access to encourage user-centered exploration. We found the OMTT was rapidly adapted by multiple professors, and its use by undergraduate students was consistent with the interpretation that the OMTT improved performance on exams and increased interest in the field of neuroscience.     

On the Stability of Students'Rules of Operation for Solving Arithmetic Problems

The purpose o f this study was to examine the consistency with which students applied procedural rules for solving signed-number operations across identical items presented in different orders. A test with 64 open-ended items was administered to 161 eighth graders. The test consisted o f two 32-item subtests containing identical items. The items in each subtest were in random order. Students'responses to each subtest were compared with respect to the identified underlying rules o f operation used to solve each problem set. The results indicated that inconsistent rule application was common among students who had not mastered signed-number arithmetic operations. In contrast, mastery level students, those who use the right rules, show a stable pattern o f rule application in signed-number arithmetic. These results are discussed in light of the hypothesis testing approach to the learning process.     

Eliciting,Interpreting and Developing Teachers' Understandings of the Nature of Science

This paper covers three main areas : eliciting teachers' views of the nature of science; interpreting and understanding these views; and developing them in the context of initial or in-service teacher education. The three areas clearly overlap but we begin with eliciting : this section includes a look at past probes, and then presents the notion of critical incidents, with a range of examples. We argue throughout that critical incidents can be used partly as a means of probing teachers' views of science, but also have value as a tool for professional development. We then discuss interpreting and understanding teachers' responses to critical incidents, based on our research with over 300 teachers and student teachers who have worked with them. In the third section, on developing, we pursue the argument that teachers' understandings of the nature of science are located in their professional experience. We argue that if teachers' understandings are embedded within their professional practice this has important consequences for appropriate teacher education and professional development in the area of the nature of science.     

The university as agent of social transformation: The postmodern argument considered

This is an abridged version of an essay that will appear inThe Imperiled Academy, edited by Howard Dickman, to be published by Transaction this year.     

General Works on Mass Communications

Russel B. Nye's The Unembarrassed Muse: The Popular Arts in America (Dial Press, $12.50)

Otto Friedrich's Decline and Fall (Harpor & Row, $10.00)

“The Sociology of Mass Media Communicators,” The Sociological Review Monograph No. 13 (University of Keele, Staffordshire, England, January 1969, $4.60 including air mail costs)

Audio Visual Marketplace: A Multimedia Guide (Bowker, $12.25)

Jerry Della Femina's From Those Wonderful Folks Who Gave You Pearl Harbor (Simon and Schuster, $6.50)     

General Communication

COMMUNICATION AS CULTURE: ESSAYS ON MEDIA AND SOCIETY by James W. Carey (Winchester, MA: Unwin Hymen [formerly Allen & Wnwin], 1989—$12.95, paper, ISBN 0-04-445064-8, with a clothbound version available)

CHALLENGING GENDER VALUES edited by Pamela J. Creedon (Newbury Park, CA: Sage Publications, 1989—$16.95, paper, ISBN 0-8039-3448-3)

PROGRESS IN COMMUNICATION SCIENCES, VOLUME DC edited by Brenda Dervin and Melvin Voigt (Norwood, NJ: Ablex, 1989—$49.50 to institutions; $29.50 personal, ISBN 0-89391-474-6)

THE INFORMATION SOCIETY: ECONOMIC, SOCIAL & STRUCTURAL ISSUES edited by Jerry L. Salvaggio (Hillsdale, NJ: Lawrence Erlbaum Associates, 1989—$24.95, ISBN 0-8058-0103-0)

MEDIA, SPORTS & SOCIETY by Lawrence A. Wenner (Newbury Park, CA: Sage, 1989—$14.95, paper, ISBN 0-8039-3244-8, with a clothbound edition available)

THE GLOBAL VILLAGE: TRANSFORMATIONS IN WORLD LIFE AND MEDIA IN THE 21ST CENTURY by Marshall McLuhan and Bruce R. Powers (New York: Oxford University Press, 1989—$29.95, ISBN 0-19-505444-X)