I'm pretty sure that article on masks and this article on Narrator/Taciturn are two separate theories. This one, at least, has to do with +/- of types which can be seen through the Model B. The latter just seems like a general purpose theory of accentuation.

Aiss, are you familiar with the functions of: Tt, Tn, St, Sn, Ft, Fn, Nt, Nn ?