| 312 | Wednesday, April 10, 2002 |
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| 3:00 PM-5:00 PM | San Diego Convention Center:Room 7A |
| Research Consortium |
| Measurement: Analysis of Compositional Data: Problems and Solutions |
| Compositional, or percentage, data have been commonly used in Kinesiology research. A teacher's time spent in a physical education class, for example, can consist of several proportions, such as instruction, management, and observation. The special and intrinsic characteristic of the compositional data is that the proportions of a composition are naturally subject to a unit-sum constraint. In the past, however, this intrinsic characteristic has been basically ignored, and general descriptive and inferential statistics (e.g., ANOVA), which were devised to un-compositional data, have been used directly and inappropriately to compositional data with consequences. The purpose of this symposium is to introduce a set of appropriate methods for both descriptive and inferential statistical analyses of compositional data. By presenting three application examples, how to analyze compositional data using these new methods is illustrated. Finally, the limitations of the methods and future research directions in this area will be described. |
Keyword(s): measurement/evaluation, research
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| Presiders: Yuanlong Liu, Western Michigan University, Kalamazoo, MI; and Weimo Zhu, University of Illinois at Urbana-Champaign, Urbana, IL |
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Speakers: |
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Simultaneous Analysis of Compositional Data: A Review
Yuanlong Liu, Western Michigan University, Kalamazoo, MI and Weimo Zhu, University of Illinois at Urbana-Champaign, Urbana, IL |
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A Comparison of Urban Black and White Women's Physical Activity Patterns
Weimo Zhu, University of Illinois at Urbana-Champaign, Urbana, IL, Barbara Ainsworth, University of South Carolina, SC and Yuanlong Liu, Western Michigan University, Kalamazoo, MI |
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Analysis of Dietary Composition of Fat, Protein, and Carbohydrates in Obese Women
Brian Ragan1, Weimo Zhu1 and Yuanlong Liu2, (1)University of Illinois at Urbana-Champaign, Urbana, IL, (2)Western Michigan University, Kalamazoo, MI |
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Compositional Data Analysis of Student Teachers' Time Usage in Physical Education Classes
Minsoo Kang1, Weimo Zhu1, Karen A. Kurz2 and Yuanlong Liu3, (1)University of Illinois at Urbana-Champaign, Urbana, IL, (2)Berry College, Mount Berry, GA, (3)Western Michigan University, Kalamazoo, MI |
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