Fig. 2.
(a) The three thin lines show the probability of endorsing three severe symptoms of an underlying continuous construct (thick curve). Only individuals with very high scores on the construct have a non-zero probability of endorsing the items, and a large proportion of the population will score zero on all items. (b) The thick lines show two latent classes, a taxon and a complement. The thin lines reflect again the probability of endorsing symptoms, which are here spread over the range of the construct.