Fig. 1: Discrimination distribution of item groups by cognitive levels. | Humanities and Social Sciences Communications

Fig. 1: Discrimination distribution of item groups by cognitive levels.

From: Two-stage polytomous attribute estimation for cognitive diagnostic models: overcoming computational challenges in large-scale assessments with many polytomous attributes

Fig. 1

The histograms display the cognitive diagnostic discrimination values for test items across four cognitive levels: memorizing (top left), understanding (top right), simple application (bottom left), and comprehensive application (bottom right). Each panel shows the frequency distribution of discrimination indices, with the x-axis representing CDM discrimination values and the y-axis representing the frequency of items. Mean, standard deviation (SD), minimum, and maximum values are provided in the top-left corner of each panel.

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