One is a control group with normal cognitive performance, and three are groups with clinical conditions according to assessment guidelines (de Paula et al., 2013;McKhann et al., 1984;Winblad et al., 2004): Amnestic Mild Cognitive Deficit (aMCD), Multi-domain Mild Cognitive Deficit (mMCD) and Alzheimer's Disease (AD).
given a sequence of semantically related words, a large number of switches from one semantic class to another has been linked to clinical conditions.