Fig. 3
From: Refinement of an instrument measuring science teachers’ knowledge of language through mixed method
Wright map of 15 items in Language Survey. Notes: (1) Diamonds demonstrate items’ thresholds. For five-point Likert scale, there are four thresholds. Therefore, there are four sets of thresholds for 15 items distributing on the person’s ability. (2) Because LQ24R doesn’t have category 1 response, recode 0 category as 1, so there is continuous with category 2, 3, and 4