Etiology of reading difficulties as a function of gender and severity     

Jesse L. Hawke  Sally J. Wadsworth  Richard K. Olson  John C. DeFries 《Reading and writing》2007,20(1-2):13-25

To test the hypothesis that the etiology of reading difficulties may differ for males and females in more severely impaired samples, reading performance data from monozygotic (MZ), same-sex dizygotic (DZ_ss), and opposite-sex dizygotic (DZ_os) twin pairs were analyzed using a model-fitting implementation of the DeFries-Fulker (DF) model (Purcell & Sham, 2003, Behavior genetics, 33, 271–278). Five non-independent samples were selected using cut-offs of −1 (N = 737 pairs), −1.5 (N = 654), −2 (N = 468), −2.5 (N = 335), and −3 (N = 198) standard deviations (s) below the mean composite reading score of control twins. Male/female gender ratios for children with reading difficulties were significantly higher than 1.0 for all five samples and increased as a function of severity (viz., 1.15, 1.17, 1.40, 1.61, and 1.88, respectively). When the DF model was fit to the data, estimates of heritability (h _g²) and shared environmental influences (c _g²) were not significantly different for males and females in any of the groups. Consequently, the most parsimonious model that provided a good fit to the data at all five levels of severity equated the heritabilities and shared environmental influences for males and females, and fixed the DZ_os coefficient of genetic relatedness at 0.5. Thus, these results provide no evidence for a differential etiology of reading difficulties as a function of gender in more severely impaired samples, and suggest that the same genetic and environmental influences contribute to reading difficulties in males and females, irrespective of severity.  相似文献   

“I Want to Feel That I Live in China”: Imaginaries and Hospitality in International Students’ (mis-)Encounters at a Top Chinese University     

Fred DERVIN  Anu HÄRKÖNEN  Mei YUAN  Wan ZHANG  Ning CHEN 《Frontiers of Education in China》2020,15(4):588

Research on international students’ experiences abroad has tended to rely on models of adjustment, integration and/or acculturation to describe their (mis-)encounters with different kinds of people (e.g., co-nationals, locals and other international students). This paper proposes to use the more fluid concepts of imaginaries and hospitality, leaving behind stages and phases of adaption and acculturation, and focusing on the influence of the Structure on their experiences. Based on a discursive pragmatic analysis of interview data with 20 international students at a top Chinese university, the authors review how the students describe the kind of hospitality experienced at this institution and the influence that it has on their (mis-)encounters. Culturalist, differentialist and essentialist imaginaries (static and fixed views of Chineseness) are often used to justify the lack of encounters and the “segregation” and somewhat “positive discrimination” that they experienced. However, the paper shows that, amongst others, the institutional hospitality management for international students leads to closed contexts of encounters and feelings of exclusion. Although the study serves as a case study and cannot be generalized to the many and varied experiences of international students in other universities in China, some recommendations are made to solve, at least in part, misconceptions about what interculturality and hospitality entail in the internationalization of higher education.  相似文献   

The impact of video case content on preservice elementary teachers’ decision‐making and conceptions of effective science teaching     

Joanne K. Olson  Crystal N. Bruxvoort  Andrea J. Vande Haar 《科学教学研究杂志》2016,53(10):1500-1523

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Impact of Virtual Work Environment on Traditional Team Domains     

Gary D. Geroy  Jackie Hartman  Joel Olson 《Performance Improvement Quarterly》2002,15(3):11-42

An extensive literature review and a phenomenological heuristic case study examined a virtual work team to determine what were salient domains of the team and determine the effect the virtual work environment had upon these domains. The study determined that post‐modern philosophy and postindustrial society are linked to changes in the marketplace and the development of virtual work environments. Seven team domains were identified. The virtual work environment affects the communication domain of teams most strongly. This effect impacts the remaining domains. Decision processes were determined to be narrower and featured conformity. Effectiveness was shown to be diminished by the reduction of social facilitation and increase in social loafing. Leadership was affected by the change in the communication network from an all‐channel network to a wheel network. Relationship and trust were affected by erosion of trust. Roles changed with the team's reduced ability to resolve differences and execute detailed action. Purpose became more task‐oriented. Technology emerged in the study as the new virtual team domain. Factors involved in team members' satisfaction were related to personality, isolation, and team membership.  相似文献   

The Behavior Engineering Model at Work on a Small Scale: Using Task Clarification,Self‐Monitoring,and Public Posting to Improve Customer Service     

John Austin  Ryan Olson  Julie Ann Wellisley 《Performance Improvement Quarterly》2001,14(2):53-76

Gilbert's (1978/1996) Behavior Engineering Model (BEM) can enable the success of novice performance engineers by prompting appropriate front‐end analysis. This paper describes the third author's first performance improvement project conducted in the customer service department at an insurance agency. Front‐end performance analysis informed the design of an intervention package that addressed particular environment and person variables. This package included task clarification, employee self‐monitoring, and public posting of group performance. A multiple baseline design across behaviors was used to assess the effects of the intervention. The performance targets were: 1) the percentage of transactions where Customer Service Representatives (CSRs) used customer names, and 2) the percentage of transactions where CSRs suggested additional services available to customers. Average performance during intervention was more than 50% better than average baseline performance for both targets. Results are discussed in terms of the utility of the BEM as a front‐end analysis tool that can guide novice performance engineers to build simple and inexpensive, yet effective, performance improvement interventions.  相似文献   

Scenario educational software: Design and development of discovery learning     

Mark Keegan  David O. Olson 《Performance Improvement》1998,37(9):39-40

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SABCO—An experiential learning project for introductory managerial accounting     

Jodi Olson  Kimberly Shannon 《Decision Sciences Journal of Innovative Education》2023,21(3):144-166

This teaching brief presents a capstone project designed to provide students with a contextual understanding of introductory management accounting theories through hands-on, experiential learning. It also exposes them to cross-disciplinary roles from operations management. Using this capstone approach, students quickly learn to prepare financial projections, either manually or in Microsoft Excel, to secure financing for their start-up business (Sand Art Brownie Company or SABCO) to produce and sell brownie mix during the holiday season. Students then assemble ingredients and create jars of brownie mix to gather the necessary data to evaluate initial projections and problem-solve for future production. This role play contextualizes the elements of direct and indirect labor, fixed and variable costs, and their impact on profit and borrowing. Postproduction reflection on the manufacturing activities and discussion of actual results of operations emphasizes the improvement and decision-making responsibilities in the management process. Feedback demonstrates that students find the exercise challenging and valuable and that it deepens their understanding of managerial accounting and its purpose in a company's management process.  相似文献