Copyright © American Speech-Language-Hearing Association From: Analysis of Performance on Cognitive Test Measures Before, During, and After 6 Months of Hearing Aid Use: A Single-Subject Experimental Design Am J Audiol. 2016;25(2):127-141. doi:10.1044/2016_AJA-15-0067 Legend: Percentage of correctly recalled words on the Listening Span Test as a function of hearing aid trial session. Each panel represents an individual study participant. Vertical dashed division lines separate the data by experimental phase: unaided baseline test scores (white squares), aided treatment test scores (black squares), unaided withdrawal test score (white square). Gray-shaded regions display the 95% critical difference (CD) of the three baseline scores (baseline CD). Date of download: 9/27/2017 Copyright © American Speech-Language-Hearing Association