Discourse coherence by patients with aphasia and neuro-typical controls. Violin plots showing the distribution of data and the probability density of discourse coherence produced during three discourse tasks among groups of neuro-typical adults (N = 20) and patients with aphasia (N = 46). Straight red lines refer to the group median, top dotted lines refer to the third quartile, and bottom dotted lines refer to the first quartile. The differences between the two groups on each discourse task was statistically significant (P < 0.001)