Table 2.

Correlation matrix for the linguistic measures and age.

Variable	Entropy	Frequency of Nouns (log)	Clauses per sentence	W.C. per 50s	Age
Entropy	1
Frequency of Nouns (log)	0.18∗∗∗	1
Clauses per sentence	0.19∗∗∗	0.15∗∗∗	1
W.C. per 50 s	0.33∗∗∗	0.27∗∗∗	0.48∗∗∗	1
Age	0.03	0.01	-0.01	-0.03∗	1

W.C. per 50 s, Word count per 50 s. ^∗p < 0.05, ^∗∗∗p < 0.001.