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Table 3 

Top five features, by absolute correlation with TIB class, in data from people without and with dementia. For example, “S1 → SQ” is a count of sentential structures that are also interrogative, and DT, NN, and PRP are determiners, nouns, and personal pronouns, respectively. Imageability and familiarity are scores obtained from the Bristol norms (Stadthagen-Gonzalez and Davis 2006).

Control FeaturesDementia Features
S1 → SQ (interrogative) Num. of PRPs :: Num. NNs + Num. PRPs 
Num. DTs Num. NNs 
Num. DTs :: Num. words Num. NNs :: ( Num. NNs + Num. VBs) 
Mean imageability NP → PRP (personal pronoun) 
Mean familiarity Mean NN imageability 
Control FeaturesDementia Features
S1 → SQ (interrogative) Num. of PRPs :: Num. NNs + Num. PRPs 
Num. DTs Num. NNs 
Num. DTs :: Num. words Num. NNs :: ( Num. NNs + Num. VBs) 
Mean imageability NP → PRP (personal pronoun) 
Mean familiarity Mean NN imageability 
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