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. 2021 Apr 8;33(7):652–671. doi: 10.1037/pas0000870

Figure 3. Combined Option Response Functions and Item Information Functions for the Internet Addiction Test-10 in the Potential Problematic Users of the Internet USA Sample (N = 252).

Figure 3

Note. The horizontal axis is the latent trait (θ) of Problematic Usage of the Internet (PUI) measured in standard deviation units (M = 0, SD = 1). The scale on the left vertical axis is the probability of endorsing a response category at various points of the PUI continuum. The scale on the right axis is information provided by the item at various points of the PUI continuum. The option response functions indicate how well different item response categories discriminate at different levels of PUI. 0 = Rarely; 1 = Occasionally; 2 = Frequently; 3 = Often; 4 = Always; ..... = Information. See the online article for the color version of this figure.