What is a perceptual object? The theory of early topological perception, which highlights that topological properties constitute a formal description of fundamental perceptual organizations (such as parsing visual scenes into potential objects, and other global, Gestalt-like operations), ties a formal definition of object to invariant properties over topological transformation. Graduate School and Institute of Biophysics, Chinese Academy of Sciences, Beijing, China Our experience on how we have overcome these problems, and completed the CAT system will be presented and discussed with some of our research data.ĥ003.1: Wholes, holes, and objects in selective attentionĬhen, L. We faced few problems in the developing, and the operating stages of this CAT system. More than eighty thousand people, ranged from junior high to college students and business workers, have taken CASEC, a test adapted at their level of English proficiency using IRT. The Japan Institute for Educational Measurement, Tokyo, JapanĬASEC, Computerized Assessment System for English Communication is, perhaps, the first computerized adaptive testing system, which succeeded in practical use for testing English abilities of Japanese test takers. The Japan Institute for Educational Measurement, Tokyo, Japan 5002.1: Practical use of computerized adaptive testing in Japan: Development and operation of 'CASEC'
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