Fig. 2
From: Many-faceted rasch calibration of the foot function index-revised short form
Facet map of the FFI-RS. The distribution displays the logit measures for foot function item difficulty, subscale difficulty, and foot function level. The logit scale on the middle of the map shows the FFI-RS question number and on the right of the map indicates the FFI-RS subscale. The logit scale on the left of the map, indicated by “*” signs, displays the foot function level of persons