Fig. 2

Items Characteristic Curve (ICC) (scale 0,1). The ordinate axis represents the probability of non-consumption (P(X = 0)) or consumption (P(X = 1)) and the abscissa axis represents the individual score or individual latent trait (Theta). The ICC describes how a change in latent trait level is related to a change in item response probability. Abbreviations: MPF = unprocessed/minimally processed foods; PF = processed foods; UPF = ultra-processed foods