A Study of Two Instructional Sequences Informed by Alternative Learning Progressions in Genetics     

Ravit Golan Duncan  Jinnie Choi  Moraima Castro-Faix  Veronica L. Cavera 《Science & Education》2017,26(10):1115-1141

Learning progressions (LPs) are hypothetical models of how learning in a domain develops over time with appropriate instruction. In the domain of genetics, there are two independently developed alternative LPs. The main difference between the two progressions hinges on their assumptions regarding the accessibility of classical (Mendelian) versus molecular genetics and the order in which they should be taught. In order to determine the relative difficulty of the different genetic ideas included in the two progressions, and to test which one is a better fit with students’ actual learning, we developed two modules in classical and molecular genetics and alternated their sequence in an implementation study with 11th grade students studying biology. We developed a set of 56 ordered multiple-choice items that collectively assessed both molecular and classical genetic ideas. We found significant gains in students’ learning in both molecular and classical genetics, with the largest gain relating to understanding the informational content of genes and the smallest gain in understanding modes of inheritance. Using multidimensional item response modeling, we found no statistically significant differences between the two instructional sequences. However, there was a trend of slightly higher gains for the molecular-first sequence for all genetic ideas.  相似文献   

The use (and misuse) of PISA in guiding policy reform: the case of Spain     

Álvaro Choi  John Jerrim 《比较教育学》2016,52(2):230-245

In 2013 Spain introduced a series of educational reforms explicitly inspired by the Programme for International Student Assessment (PISA) 2012 results. These reforms were mainly implemented in secondary education – based upon the assumption that this is where Spain's educational problems lie. This paper questions this assumption by attempting to identify the point where Spanish children fall behind young people in other developed countries. Specifically, by drawing data from multiple international assessments, we are able to explore how cross-national differences in reading skills change as children age. Consideration is given to both the average level of achievement and the evolution of educational inequalities. Our conclusion is that policy-makers have focused their efforts on the wrong part of the education system; educational achievement is low in Spain (and educational inequalities large) long before children enter secondary school. This study therefore serves as a note of caution against simplistic interpretation of the PISA rankings.  相似文献   

Structured Constructs Models Based on Change‐Point Analysis          下载免费PDF全文

Hyo Jeong Shin  Mark Wilson  In‐Hee Choi 《Journal of Educational Measurement》2017,54(3):306-332

This study proposes a structured constructs model (SCM) to examine measurement in the context of a multidimensional learning progression (LP). The LP is assumed to have features that go beyond a typical multidimentional IRT model, in that there are hypothesized to be certain cross‐dimensional linkages that correspond to requirements between the levels of the different dimensions. The new model builds on multidimensional item response theory models and change‐point analysis to add cut‐score and discontinuity parameters that embody these substantive requirements. This modeling strategy allows us to place the examinees in the appropriate LP level and simultaneously to model the hypothesized requirement relations. Results from a simulation study indicate that the proposed change‐point SCM recovers the generating parameters well. When the hypothesized requirement relations are ignored, the model fit tends to become worse, and the model parameters appear to be more biased. Moreover, the proposed model can be used to find validity evidence to support or disprove initial theoretical hypothesized links in the LP through empirical data. We illustrate the technique with data from an assessment system designed to measure student progress in a middle‐school statistics and modeling curriculum.  相似文献   

Understanding the Transfer Deficit: Contextual Mismatch,Proactive Interference,and Working Memory Affect Toddlers’ Video‐Based Transfer          下载免费PDF全文

Koeun Choi  Heather L. Kirkorian  Tiffany A. Pempek 《Child development》2018,89(4):1378-1393

Researchers tested the impact of contextual mismatch, proactive interference, and working memory (WM) on toddlers’ transfer across contexts. Forty‐two toddlers (27–34 months) completed four object‐retrieval trials, requiring memory updating on Trials 2–4. Participants watched hiding events on a tablet computer. Search performance was tested using another tablet (match) or a felt board (mismatch). WM was assessed. On earlier search trials, WM predicted transfer in both conditions, and toddlers in the match condition outperformed those in the mismatch condition; however, the benefit of contextual match and WM decreased over trials. Contextual match apparently increased proactive interference on later trials. Findings are interpreted within existing accounts of the transfer deficit, and a combined account is proposed.  相似文献   

Understanding the leadership qualities of a head of department coping with curriculum changes in a Hong Kong secondary school     

Angela Choi Fung Tam 《School Leadership & Management》2013,33(4):367-386

Little relevant research examining the leadership patterns of heads of department (HoD) coping with curriculum changes is found within the Chinese context. This article presents an exploratory case study which delineates the leadership qualities exhibited by a HoD as he overcomes the difficulties typically confronted in the process of school-based curriculum development (SBCD) in a Hong Kong secondary school. The findings showed that the challenges faced by the HoD included: (1) teachers' low receptivity of SBCD; (2) teachers' limited time and expertise in SBCD; and (3) a need for more effective collaboration in the department. The essential leadership patterns detected were: (1) personal charisma; (2) shared vision building; (3) empowerment of teachers; (4) changing beliefs and enhancing the capacity of teachers; and (5) fostering collegiality among teachers. This study suggests that unless the HoD is committed to making an innovation a priority, the potential of teachers to contribute to any curriculum change may not be realised.  相似文献   

Understanding gender inequality in central e-government: A Korean case study     

Yeon-Tae Choi  Sangin Park 《Government Information Quarterly》2013

In this study, we examine gender inequality in the use of the Korean central government website in 2010. Adapting the digital divide and the gender differentiation hypothesis, we analyze e-government users and the determinants of their demand for e-government websites. Specifically, after controlling for socio-economic factors and family characteristics as demand determinants, we test whether gender inequality in e-government access and usage persists across central government units that provide differentiated public services. Our regression results indicate (i) no persistent gender inequality, supporting the gender differentiation hypothesis, and (ii) the importance of family characteristics as a determinant of demands for e-government websites. However, we also find a persistent divide in access to and usage of central e-government services by education and occupation, which deserves more attention and further research.  相似文献   

Primacy of Broadcast News: A Mediation Analysis of Recall,Attitudes, and Voting Intentions     

Yun Jung Choi  Jong Hyuk Lee 《Journal of Applied Communication Research》2013,41(1):84-103

This study examines how the order and proportion of scene valence within a television news story influence viewers' processing of political information. The results of the study, based on structural equation modeling and Sobel's mediation analysis, suggest that, in a news story about a political candidate, positive information on the candidate is recalled better if he or she is praised at the beginning of the story and then criticized at the end than if he or she is criticized first and praised later. In addition, there was a strong proportion effect. Stories with a high proportion of positive scenes were more likely to increase the participant's recall of positive information and induce his or her favorable attitudes and voting intentions than those with a low proportion of positive scenes.  相似文献   

Scope of the Library Catalog in Times of Transition     

Jina Choi Wakimoto 《Cataloging & classification quarterly》2013,51(5):409-426

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Television,Gender Norms,and Tanning Attitudes and Intentions of Young Men and Women     

Hyunyi Cho  Jounghwa Choi 《Communication Studies》2013,64(5):508-530

This study investigated whether and how exposure to tanned images on television is related to tanning attitudes and intentions among men and women, using the influence of presumed influence model (Gunther & Storey, 2003 Gunther , A. C. , & Storey , J. D. ( 2003 ). The Influence of presumed influence . Journal of Communication , 53 , 199 – 215 .[Crossref], [Web of Science ®] , [Google Scholar]). The model showed a better fit with the male rather than female sample. In addition, among males, exposure to tanned-men images on television was directly associated with protanning attitudes and was indirectly associated with protanning intentions. Corresponding direct and indirect associations were not found among females. Instead, the results suggest females may project their own protanning intentions into the estimation of protanning norms among male and female peers. These results suggest the social perceptual processes underlying the link between television exposure and tanning tendencies of men and women may differ.  相似文献   

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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