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. Author manuscript; available in PMC: 2018 Oct 1.
Published in final edited form as: Arch Phys Med Rehabil. 2017 Apr 21;98(10):1977–1983. doi: 10.1016/j.apmr.2017.03.021

Figure 1. Rasch Analysis Wright Person-Item Map.

Figure 1

The center vertical column is the measurement metric in logit units ranging from −6.00 to 5.00. Relative to this column, people are to the left and items are to the right. People are located along the metric according to their measures of person ability so that lower ability people (low person measures) are at the bottom of the map, and higher ability people (high person measures) are at the top of the map. Each item is located along the metric according to its measure of item difficulty. The easiest items are located at the bottom of the map and the more difficult items are located at the top of the map.