Toraldo Alessio, Luzzatti Claudio
University of Pavia, Italy.
Brain Lang. 2006 Feb;96(2):154-6; discussion 157-70. doi: 10.1016/j.bandl.2005.08.013. Epub 2005 Oct 20.
Drai and Grodzinsky provide a valuable analysis that offers a way of disentangling the effects of Movement and Mood in agrammatic comprehension. However, their mathematical implementation (Beta model) hides theoretically relevant information, i.e., qualitative heterogeneities of performance within the patient sample. This heterogeneity is crucial in the variability debate.