The Impact of Multidimensionality on Extraction of Latent Classes in Mixture Rasch Models          下载免费PDF全文

Yoonsun Jang  Seock‐Ho Kim  Allan S. Cohen 《Journal of Educational Measurement》2018,55(3):403-420

This study investigates the effect of multidimensionality on extraction of latent classes in mixture Rasch models. In this study, two‐dimensional data were generated under varying conditions. The two‐dimensional data sets were analyzed with one‐ to five‐class mixture Rasch models. Results of the simulation study indicate the mixture Rasch model tended to extract more latent classes than the number of dimensions simulated, particularly when the multidimensional structure of the data was more complex. In addition, the number of extracted latent classes decreased as the dimensions were more highly correlated regardless of multidimensional structure. An analysis of the empirical multidimensional data also shows that the number of latent classes extracted by the mixture Rasch model is larger than the number of dimensions measured by the test.  相似文献   

Pioneering a web-based science museum in Taiwan: Design and implementation of lifelong distance learning of science education     

Shelley Shwu-Ching Young  Yi-Long Huang  Jyh-Shing Roger Jang 《Educational technology research and development : ETR & D》2000,48(1):112-123

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Modeling and control of a piezoelectric actuator driven system with asymmetric hysteresis     

Ming-Jyi Jang  Chieh-Li Chen 《Journal of The Franklin Institute》2009,346(1):17-32

This study describes the high-precision positioning control of a system with asymmetric hysteresis. A switching system concept is adopted to describe the Preisach-type hysteresis, and a systematic modeling procedure is established to obtain the parameters of the system. A piezoelectric actuator system driven by a voltage amplifier is used to verify the modeling accuracy. A control structure, comprising a feedforward controller and a PD-type feedback controller, is used to realize the high-precision positioning control of the piezoelectric actuator driven stage. To enhance tracking control, a high-frequency modified term is incorporated into the hysteresis model. The experimental results confirm that the addition of this modified term reduces the tracking error and prevents the controlling energy from being saturated.  相似文献   

地方师范院校“数字逻辑”实验课的革新与研究     

姜云杰 《中国科技信息》2008,(22)

地方师范院校的"数字逻辑"实验课教学存在诸多问题.通过建立多层次的实验教学内容,更新实验教学理念,创新实验教学手段,改革考核方式等一系列措施,使得实验教学效果非常显著.  相似文献   

Reconsidering human performance technology     

Hwan Young Jang 《Performance Improvement》2008,47(6):25-33

This article discusses three perceived challenges in the field of human performance technology: a missing link from training to performance, limitations in gap analysis and cause analysis, and a lack of attention to business and organization performance. It then provides possible alternatives for each issue, such as instructional system development frameworks for organizational learning, a soft performance technology framework, and a proposed framework for four levels of performance.  相似文献   

Satisfying psychological needs on the high seas: explaining increases self-esteem following an Adventure Education Programme     

Damian Scarf  Sarah Kafka  Jill Hayhurst  Kyungho Jang  Mike Boyes  Ruth Thomson 《Journal of Adventure Education & Outdoor Learning》2018,18(2):165-175

A number of recent studies have revealed that taking part in a sail-training-based Adventure Education Programme elevates youths’ self-esteem. Across two studies, we sought to examine the extent to which youths’ sense of belonging contributed to this increase in self-esteem. Study 1 revealed that participants who completed the voyage showed an increase in self-esteem from the first to the last day of the voyage. Partial correlation revealed that group belonging made a unique contribution to this change. Study 2 replicated Study 1 and, further, demonstrated that the relationship between group belonging and self-esteem was not a function of self-efficacy or group esteem. Such findings suggest that an important contributing factor to the benefits of sail-training interventions is their potential to satisfy psychological needs, in this case the need to belong.  相似文献   

Two‐dimensional sectioned images and three‐dimensional surface models for learning the anatomy of the female pelvis     

Dong Sun Shin  Hae Gwon Jang  Sung Bae Hwang  Dong‐Hwan Har  Young Lae Moon  Min Suk Chung 《Anatomical sciences education》2013,6(5):316-323

In the Visible Korean project, serially sectioned images of the pelvis were made from a female cadaver. Outlines of significant structures in the sectioned images were drawn and stacked to build surface models. To improve the accessibility and informational content of these data, a five‐step process was designed and implemented. First, 154 pelvic structures were outlined with additional surface reconstruction to prepare the image data. Second, the sectioned and outlined images (in a browsing software) as well as the surface models (in a PDF file) were placed on the Visible Korean homepage in a readily‐accessible format. Third, all image data were visualized with interactive elements to stimulate creative learning. Fourth, two‐dimensional (2D) images and three‐dimensional (3D) models were superimposed on one another to provide context and spatial information for students viewing these data. Fifth, images were designed such that structure names would be shown when the mouse pointer hovered over the 2D images or the 3D models. The state‐of‐the‐art sectioned images, outlined images, and surface models, arranged and systematized as described in this study, will aid students in understanding the anatomy of female pelvis. The graphic data accompanied by corresponding magnetic resonance images and computed tomographs are expected to promote the production of 3D simulators for clinical practice. Anat Sci Educ 6: 316–323. © 2013 American Association of Anatomists.  相似文献   

Correction to: LGB identity and career decision-making self-efficacy among sexual minority college students     

Jang  Hansori  Smith  Carol K.  Duys  David K. 《International Journal for Educational and Vocational Guidance》2021,21(3):717-717

International Journal for Educational and Vocational Guidance - In the original article published, the first author’s affiliation is incorrect. The correct affiliation of the author Hansori...  相似文献