On page 72 of the article by Ahlstrom et al. in the January/February 2014 issue of Ear and Hearing, the key words listed are incorrect. The key words should be as follows: Spatial separation, Amplification, Hearing-aid benefit, and Listening effort.
Ahlstrom J. B., Horwitz A. R., Dubno J. R.. Spatial separation benefit for unaided and aided listening. Ear Hear. (2014);35:73–85