Abstract
This chapter continues the discussion of Wright maps by considering two related issues in detail. First, the examination of person measures and item measures simultaneously is introduced. In particular, readers are presented with examples enabling them to interpret a person measure given the item measures. Following this discussion, the chapter moves on to plotting groups (e.g., male and female) and pre-/post-measures and how to interpret those measures in light of item measures. Readers learn how to express the specific differences between comparison groups by noting the items which fall between the comparison groups on the Wright map. The chapter finishes with a summary discussion between our two students, 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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Additional Readings
A very good discussion of the types of validity that can be evaluated with Rasch analysis. Many of the examples relate to the use of Wright Maps.
Baghaei, P. (2008). The Rasch model as a construct validation tool. Rasch Measurement Transactions, 22(1), 1145–1146.
An article demonstrating how Wright Maps can be used.
Pesudovs, K., Garamendi, E., Keeves, J. P., & Elliott, D. B. (2003a). Maps for diagnosis. Rasch Measurement Transactions, 17(3), 935.
An article in medical research in which a Wright Map was used.
Pesudovs, K., Garamendi, E., Keeves, J. P., & Elliott, D. B. (2003b). The activities of daily vision scale for cataract surgery outcomes: Re-evaluating validity with Rasch analysis. Investigative Ophthalmology & Visual Science, 44(7), 2892–2899.
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Boone, W.J., Staver, J.R., Yale, M.S. (2014). Wright Maps: Second Steps. In: Rasch Analysis in the Human Sciences. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-6857-4_7
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DOI: https://doi.org/10.1007/978-94-007-6857-4_7
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