Fig. 4: A Category Probability Curve for the OE, showing the probability of selecting each response category (Strongly Disagree, Disagree, Neutral, Agree, Strongly Agree) relative to item difficulty. | Humanities and Social Sciences Communications

Fig. 4: A Category Probability Curve for the OE, showing the probability of selecting each response category (Strongly Disagree, Disagree, Neutral, Agree, Strongly Agree) relative to item difficulty.

From: Rasch analysis in developing a questionnaire to measure self-efficacy beliefs of Omani preservice science teachers for teaching through engineering design

Fig. 4

The x-axis measures item difficulty, and the y-axis shows category probability. The curves (‘SD’ in red, ‘D’ in blue, ‘N’ in magenta, ‘A’ in black, ‘SA’ in green) intersect at various points. Note: SD=Strongly Disagree, D=Disagree, N=Neutral, A=Agree, SA=Strongly Agree. This curve is based on the full set of 30 OE items.

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