Assessing Knowledge Integration in Science: Construct,Measures, and Evidence     

Ou Lydia Liu  Hee-Sun Lee  Carolyn Hofstetter  Marcia C. Linn 《Educational Assessment》2013,18(1):33-55

In response to the demand for sound science assessments, this article presents the development of a latent construct called knowledge integration as an effective measure of science inquiry. Knowledge integration assessments ask students to link, distinguish, evaluate, and organize their ideas about complex scientific topics. The article focuses on assessment topics commonly taught in 6th- through 12th-grade classes. Items from both published standardized tests and previous knowledge integration research were examined in 6 subject-area tests. Results from Rasch partial credit analyses revealed that the tests exhibited satisfactory psychometric properties with respect to internal consistency, item fit, weighted likelihood estimates, discrimination, and differential item functioning. Compared with items coded using dichotomous scoring rubrics, those coded with the knowledge integration rubrics yielded significantly higher discrimination indexes. The knowledge integration assessment tasks, analyzed using knowledge integration scoring rubrics, demonstrate strong promise as effective measures of complex science reasoning in varied science domains.  相似文献   

Selective Parent Participation: Structural and Cultural Factors that Influence School Participation Among Korean Parents     

Soyoung Lee 《Equity & Excellence in Education》2013,46(4):299-308

This study examines the process of parent participation for a group of Korean parents in a Korean English two-way immersion program who were labeled “uncooperative.” It adopts Ogbu's cultural ecological theory as the theoretical framework for examining the phenomenon and thus it examines both the environmental as well as the cultural forces that underlie the parents' patterns of participation. Over the course of an academic semester, eight parents and three staff members were interviewed and observed during PTA meetings and other parent involvement events. Findings indicate that the Korean parents practiced “selective participation.” Findings also point to the importance of acknowledging institutional barriers and cultural differences in parents' school participation patterns.  相似文献   

TEXAS TECH PREP ENVIRONMENTAL SCAN OF PARTNER OPINIONS: AN ASSESSMENT OF EFFECTIVENESS     

Sharon Kay Waller  Lee “Rusty” Waller 《Community College Journal of Research & Practice》2013,37(7):625-635

Tech Prep is a federal education initiative funded by the Carl D. Perkins Vocational and Technical Education Act initially authorized in 1990 then reauthorized in 1998. Texas HB 2401 subsequently established the parameters for the operation of Tech Prep in Texas. Texas has 26 regional consortia that coordinate the delivery of services between secondary school districts and two-year colleges under the leadership of consortium directors. The research reported in this paper examined the effectiveness of these consortia based upon an opinion survey administered to Texas Tech Prep consortia directors, community college technical administrators, and secondary technical program directors.  相似文献   

Science,Technology, Engineering,and Mathematics (STEM) Pathways: High School Science and Math Coursework and Postsecondary Degree Attainment     

Will Tyson  Reginald Lee  Kathryn M. Borman  Mary Ann Hanson 《Journal of Education for Students Placed at Risk》2013,18(3):243-270

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CROSS-CULTURAL COMPARISON OF PERCEPTIONS ON THE GLOBAL SCIENTIFIC LITERACY WITH AUSTRALIAN,CHINESE, AND KOREAN MIDDLE SCHOOL STUDENTS     

Mun  Kongju  Lee  Hyunju  Kim  Sung-Won  Choi  Kyunghee  Choi  Sung-Youn  Krajcik  Joseph S. 《International Journal of Science and Mathematics Education》2013,13(2):437-465

In this study, we explored the extent to which Australian, Chinese, and Korean middle school students perceived themselves to have scientific literacy as global citizens and attempted to identify differences and/or commonalities in their perceptions. A total of 655 middle school students (8th and 9th grades; 358 girls and 297 boys) from the three countries participated in the study. We used Global Scientific Literacy Questionnaires (GSLQ) as a survey instrument to assess the students’ perceptions. The GSLQ was developed based on a conceptual framework of Scientific Literacy suggested by Choi, Kim, Lee, Mun, Choi, Krajcik & Shin (2011) and Choi, Lee, Shin, Kim & Krajcik (Journal of Research in Science Teaching, 48(6), 670–697, 2011) for citizenship education in the 21st century. The results indicated that most of the students from the three countries showed a tendency toward higher scores for Science as human endeavor; the lowest scores were in Meta-cognition and self-direction. A pattern of gender difference was also examined among the three countries. We suggest future research questions based on a cross-cultural perspective in order to explore the reasons for the existence of these similarities and differences.

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Utilizing local evidence for blog feed search     

Yeha Lee  Seung-Hoon Na  Jong-Hyeok Lee 《Information Retrieval》2012,15(2):157-177

Blog feed search aims to identify a blog feed of recurring interest to users on a given topic. A blog feed, the retrieval unit for blog feed search, comprises blog posts of diverse topics. This topical diversity of blog feeds often causes performance deterioration of blog feed search. To alleviate the problem, this paper proposes several approaches based on passage retrieval, widely regarded as effective to handle topical diversity at document level in ad-hoc retrieval. We define the global and local evidence for blog feed search, which correspond to the document-level and passage-level evidence for passage retrieval, respectively, and investigate their influence on blog feed search, in terms of both initial retrieval and pseudo-relevance feedback. For initial retrieval, we propose a retrieval framework to integrate global evidence with local evidence. For pseudo-relevance feedback, we gather feedback information from the local evidence of the top K ranked blog feeds to capture diverse and accurate information related to a given topic. Experimental results show that our approaches using local evidence consistently and significantly outperform traditional ones.  相似文献   

The era of incremental change in the technology innovation life cycle: An analysis of the automotive emission control industry     

Jaegul Lee  Nicholas Berente 《Research Policy》2013

According to the life cycle model of technological evolution, after the emergence of a dominant design, technological product industries undergo an “era of incremental change.” This era of incremental change is not well understood in the existing literature. Although the period is typically characterized in terms of stability and minimal innovation, we find that the era of incremental change can be actually quite dynamic. Through our research into the period of time following the emergence of a dominant design in automotive emission control systems, we find that the overall product innovation in the industry did not decline immediately following the dominant design, and increased throughout the era of incremental change. Further, we find that firms maintain their attention on the same core components that they innovated upon before the dominant design, but that these components make up less of the overall proportion of total innovation throughout the era of incremental change. Finally, we found that the concentration of innovating firms in the industry increases immediately following the dominant design, and this concentration decreases over time throughout the era of incremental change. Findings imply a pattern of contraction and expansion in the era of incremental change that extends previous work on the technological product life cycles and helps to characterize the era of incremental change in a novel way.  相似文献   

A mixed methods approach to electronic word-of-mouth in the open-market context     

So-Hyun Lee  Seung-Eui Noh  Hee-Woong Kim 《International Journal of Information Management》2013

Electronic word-of-mouth (eWOM) has been identified as a key factor affecting online sales. However, the factors leading to eWOM in the open-market context are not fully understood. Since many Internet vendors have adopted the open-market business model, it is essential to understand the factors for eWOM leading to the success of open-market business. This study investigates factors affecting eWOM in the open-market context based on a sequential combination of qualitative and quantitative research methods. The exploratory findings in the qualitative study form the basis for the quantitative study survey research. The findings from this mixed methods study indicate the significance of three new factors (information-sharing desire, self-presentation desire, and open-market reward) and two established factors (open-market satisfaction and open-market loyalty) affecting eWOM directly and indirectly. This study makes a useful contribution to the broader literature on eWOM. These findings also inform open-market providers as to how to promote and manage eWOM for online business success.  相似文献   

The role of governance effectiveness in explaining IT outsourcing performance     

Yong Jin Kim  Jong Man Lee  Chulmo Koo  Kichan Nam 《International Journal of Information Management》2013

Recent studies on IT outsourcing have examined the effect of contract specification and relationship strength on IT outsourcing performance in a separate manner. Previous studies, however, ignored the importance of the governance effectiveness that bonds contractual control and relationship strength together to deliver expected outcomes in IT outsourcing exchange. In this paper, we propose a model of IT outsourcing management where governance effectiveness mediates the effect of both contractual control and relationship strength on IT outsourcing performance. We collected data from 143 client companies of IT outsourcing and analyzed it using the PLS method. Our findings show that both contract specification and relationship strength significantly influence governance effectiveness, although contract specification carries the more effect on governance effectiveness than relationship strength does. The governance effectiveness in turn mediates the effect of contract specification and relationship strength on three sub-dimensions of outsourcing performance: cost efficiency, performance improvement, and overall satisfaction. The results and implications are further discussed.  相似文献   

Selective dynamic concentration of peptides at poles of cation-selective nanoporous granules     

Hsiao-Ping Chen  Chia-Chun Tsai  Hung-Meng Lee  Shau-Chun Wang  Hsueh-Chia Chang 《Biomicrofluidics》2013,7(4)

The authors exposed a non-equilibrium dynamic counterion and coion analyte concentration to an AC electric field to selectively concentrate peptides at the poles of a cation-selective granule. The counterion polarization results from the focusing of the electric field show a discontinuous drop in the intra-granule counterion electromigration flux at the pole. The coion concentration polarization is due to the combined external convective and electromigration fluxes toward the pole that neutralize the accumulating counterions. Because the electromigration mobility of the peptide anion analyte depends on the pH, the authors determined a 20 000-fold high concentration factor for a near-neutral pH of 6.0 to 7.7. Because the peptide is protonated at the acidic pole and its absolute charge ranges from −0.3 to −1.9, the concentration factor scales exponentially with the absolute charge, thus allowing extremely selective concentrations of various peptides, which is demonstrated by fluorescein isothiocyanate tagged angiotensin I (pI ∼ 5.8) and Texas red tagged avidin (pI ∼ 10.5). This dynamic concentration effect can substantially enhance the sensitivity of bio-assays.  相似文献