Grammatical morphology in aphasia: a case of errata or reader misinterpretations?

As convincing as the discussion presented by Elizabeth Bates, Angela Friederici and Beverly Wulfeck on grammatical morphology in aphasia in three languages may seem, we were at loss when trying to reconstruct the quantitative basis of their argumentation (see Bates et al., 1987, Grammatical morphology in aphasia: Evidence from three languages. Cortex, 23: 545-575). With the present notice we would like to lessen the possibility of reader misinterpretations that may easily confuse the thread of the argument of this article in the form in which it was originally presented.