Student Learning about Biomolecular Self-Assembly Using Two Different External Representations     

Gunnar E. H?st  Caroline Larsson  Arthur Olson  Lena A. E. Tibell 《CBE life sciences education》2013,12(3):471-482

Self-assembly is the fundamental but counterintuitive principle that explains how ordered biomolecular complexes form spontaneously in the cell. This study investigated the impact of using two external representations of virus self-assembly, an interactive tangible three-dimensional model and a static two-dimensional image, on student learning about the process of self-assembly in a group exercise. A conceptual analysis of self-assembly into a set of facets was performed to support study design and analysis. Written responses were collected in a pretest/posttest experimental design with 32 Swedish university students. A quantitative analysis of close-ended items indicated that the students improved their scores between pretest and posttest, with no significant difference between the conditions (tangible model/image). A qualitative analysis of an open-ended item indicated students were unfamiliar with self-assembly prior to the study. Students in the tangible model condition used the facets of self-assembly in their open-ended posttest responses more frequently than students in the image condition. In particular, it appears that the dynamic properties of the tangible model may support student understanding of self-assembly in terms of the random and reversible nature of molecular interactions. A tentative difference was observed in response complexity, with more multifaceted responses in the tangible model condition.  相似文献   

Perceptions and practices regarding M.A. capstone options and PH.D. admission decisions: A survey of communication M.A. and PH.D. program representatives     

Kathryn M. Olson  Renee A. Meyers  Kristi L. Wilkum 《Communication Studies》2013,64(2):188-195

In terms of positioning a student for Ph.D. admission, the decision to complete a thesis or comprehensive exams as one's M.A. capstone is based on much speculation, but little systematic study. This study surveyed M.A. and Ph.D. Communication program representatives about doctoral programs' admission preferences and practices regarding applicants holding M.A.s from other institutions, as well as perceptions of their institution's students' actual capstone choices. In nearly half the cases, doctoral program representatives were unaware of whether students admitted with M.A.s had elected the thesis, comprehensive exams, or some other capstone option. Additionally, the results show that Ph.D. programs prioritize students' writing samples, statements of reasons, and GRE scores when deciding admission. There were discrepancies between M.A. program representatives' perceptions of what information weighed most heavily with doctoral admissions committees and the priorities reported by Ph.D. program representatives.  相似文献   

“If you hit me again,I'll hit you back:” Conflict management strategies of individuals experiencing aggression during conflicts     

Loreen N. Olson  Dawn O. Braithwaite 《Communication Studies》2013,64(2):271-285

In interpersonal relationships characterized by aggression, the negotiation of conflict is especially significant. The present study examined the conflict management strategies used by 31 individuals who had experienced verbal and/or physical aggression during conflicts with their partners. Sillars’ (1986) conflict tactics coding system was used as a framework to analyze 960 pages of transcribed data. The results of this deductive content analysis indicated that the participants reported using primarily Distributive conflict strategies. Analytic induction was also used to interpret nonverbal forms of conflict management, revealing three common tactics: crying, nonverbal avoidance, and aggression. Implications for using these conflict strategies in interpersonal relationships characterized by aggression are discussed.  相似文献   

Beyond family structure: The family in domestic comedy     

William Douglas  Beth M. Olson 《广播与电子媒介杂志》2013,57(2):236-261

This inquiry examined the portrayal of family relationships in domestic comedy. Participants were randomly assigned to view and evaluate samples of thirteen programs, selected for the study on the basis of their popularity during the period 1950‐1990. Separate discriminant function analyses of spousal and parent‐child relations showed that spousal relations were defined in terms of receptiveness and expressiveness while parent‐child relations were defined in terms of the effectiveness of child socialization and the affective tone of the relationship. Further examination provided strong evidence that the development of the television family has occurred as a stepwise process in which successive generations have been characterized by changed levels of relational openness and a general trend toward increased expression of affect in spousal relations. The study yielded no support for the claim that family life and family relations have deteriorated across time in the television family although there was evidence that working‐class families are seen to be less functional than higher socio‐economic status families. The limitations and implications of these findings are discussed.  相似文献   

Makeover TV: Selfhood,Citizenship, and Celebrity     

Beth M. Olson Ph.D. 《广播与电子媒介杂志》2013,57(2):277-278

A survey conducted in McAllen, Texas, a largely Hispanic area, examined whether exposure to Spanish-language cable news had an agenda-setting effect. Results show that level of exposure was associated with agenda-setting effects for Spanish cable news, but perceived media credibility and media reliance were not related to the strength of agenda-setting effects. Exposure, credibility, and reliance were also not associated with agenda- setting effects for English-language newscasts-perhaps because English speakers had more news options in the survey area.  相似文献   

A case study of integration and destreaming: Teachers and students in an Ontario secondary school respond     

Christine L. Robertson  Barry Cowell  John Olson 《课程研究杂志》2013,45(6):691-717

The direction that secondary school reform should take has become a contested question in the province of Ontario, Canada, during the 1990s. This case study of one secondary school examines some of the issues surrounding the transition years. Two policies, destreaming and integration, mandatedbythe OntarioMinistryof Education in 1993, and fully implemented by 1995, are examined by means of interview and survey. Administrators, teachers and students commented on the transition from elementary to secondary school. We discuss questions related to destreaming (especially how teachers contend with mixed-ability classes) and integration (with a particular focus on mathematics, science and technology).  相似文献   

A Quantitative Procedure for the Identification of Effective Schools     

William J. Webster  George H. Olson 《Journal of Experimental Education》2013,81(4):213-219

This paper outlines a quantitative procedure for identifying effective schools. Effective schools are defined as those schools that produce student test performance that departs markedly, in an upward direction, from pre-established school and district trends. The methodology for this procedure is described, and correlations of procedure results with important student enrollment and attendance statistics, teacher background variables, and previous and concurrent absolute levels of student achievement are discussed. Finally, the use of this procedure for rewarding outstanding schools is described.  相似文献   

I Am Your Sister: Collected and Unpublished Writings of Audre Lorde,by Rudolph P. Byrd,Johnnetta Betsch Cole,and Beverly Guy-Sheftall     

Lester C. Olson 《Quarterly Journal of Speech》2013,99(3):338-342

  相似文献   

Executing Democracy: Volume 1: Capital Punishment & The Making of America, 1683–1807     

Lester C. Olson 《Quarterly Journal of Speech》2013,99(2):250-253

The Nature of Literature: Its Relation to Science, Language and Human Experience. By Thomas Clark Pollock. Princeton: the Princeton University Press, 1942; pp. 218 + xxvi. $3.00.

Roosevelt's Foreign Policy, 1933–1941: Franklin D. Roosevelt's Unedited Speeches and Messages. Compiled and collated by Douglas Lurton. New York: Wilfred Funk, Inc., 1942; pp. xv + 634. $3.75.

Voices of History: Great Speeches and Papers of the Year 1941. Edited by Franklin Watts with an introduction by Charles Beard. New York: Franklin Watts, Inc., 1942; pp. xix + 669. $3.50.

Playwrights Present. By H. H. Giles and Robert J. Cadigan. New York: Harper and Brothers, 1943; pp. xiii + 290. $1.60.

A Theory of Meaning Analyzed. General Semantics Monographs, Number III. Chicago: Institute of General Semantics, 1942; pp. xvi and 46. $1.50.

Speech Correction on the Contract Plan. By Ruth Manser. Rev. ed. New York: Prentice‐Hall, Inc., 1942; pp. xix + 381. $3.00.

Speech in a Democracy. By Herold T. Ross and Clarence C. Shoemaker. Boston: Expression Co., 1942; pp. 276. $2.50.  相似文献   

Felipe Guaman Poma de Ayala's Primer Nueva Corónica y Buen Gobierno and the Practice of Rhetorical Theory in Colonial Peru     

Christa J. Olson  Rubén Casas 《Quarterly Journal of Speech》2013,99(3):459-484

This essay takes up Felipe Guaman Poma de Ayala's Primer Nueva Corónica y Buen Gobierno as an artifact of early colonial Peruvian rhetoric and an evocative example of American rhetorical theory. Our analysis illuminates how Guaman Poma theorizes transcultural colonial communication from an Andean perspective. We highlight three key elements in his theory: its ethical copia, its concern with the insufficiency of the available genres, and its assumption that communication will fail. In the end, we suggest, Guaman Poma provides a generative, if incomplete, theory that helps account for the complexities of colonial rhetorical practice.  相似文献