Abstract
In many research projects, data are collected using a number of different rating scales (Yes/No, Strongly Agree–Agree–Disagree–Strongly Disagree, Often–Sometimes–Seldom–Never), but all the items involve measurement of the same trait. This chapter demonstrates the steps a researcher can take to use items from a number of rating scales (which measure the same trait) to compute a person measure. This technique provides many benefits for researchers, one of which is the possibility of utilizing a larger number of items to measure a respondent. Also, using a range of rating scales might allow different parts of a trait to be marked by an item. The chapter finishes up with a student dialogue, Keywords and Phrases, Quick Tips, Data Files, References, and Additional Readings. As in almost all chapters, sample analyses are used to reinforce the chapter topic.
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References
Wright, B. D., & Masters, G. (1982). Rating scale analysis. Chicago: Mesa Press.
Linacre, J. M. (2012) Winsteps (Version 3.74) [Software]. Available from http://www.winsteps.com/index.html
Additional Readings
Read the section of the Winsteps Manual devoted to the command line ISGROUPS.
Linacre, J. M. (2012) Winsteps (Version 3.74) [Software]. Available from http://www.winsteps.com/index.html
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Boone, W.J., Staver, J.R., Yale, M.S. (2014). Combining Scales. In: Rasch Analysis in the Human Sciences. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6857-4_19
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DOI: https://doi.org/10.1007/978-94-007-6857-4_19
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