Subscribe to The Chicago Manual of Style Online
Usage and Grammar
Q. I am working with a manuscript in which the faculties of reason and feeling are described as rationality and emotionality. Since emotionality is derived from emotional, it seems to me that it might convey an excessively emotional state rather than feeling. Kindly advise.
A. A quick internet search reveals that emotionality is a term used by psychologists. If the manuscript is in that area, the term could well be accurate and appropriate. It would be wise to query the author before changing anything; with a little more research you might save yourself the embarrassment of querying a basic term.