It has become much more socially acceptable to communicate ones emotions in the last few decades. This, added to the fact that female authors have tended to com

It has become much more socially acceptable to communicate ones emotions in the last few decades. This, added to the fact that female authors have tended to communicate differently (and I see no attempt to control for that in my admittedly quick scan of the write-up) makes me think that they may just be detecting a cultural trend in favour of honest emotional self-expression.