Results
REGRESSION
The data included 21 participants (11 female) who were randomized to listen with either a default map (Demographic information for electric–acoustic stimulation users listening with either a default map or a place-based map.
Unaided air-conduction pure-tone detection thresholds for each participant at initial activation and 1, 3, and 6 months postactivation. Individual thresholds are indicated by symbol shape and fill, as defined in 
Speech recognition as a function of electric frequency-to-place mismatch at 1500 Hz at initial activation and 1, 3, and 6 months postactivation. Performance was assessed for vowel recognition (left column) and consonant–nucleus–consonant (CNC) words recognition (right column), scored as the percent correct. Individual performance is indicated by symbol shape and fill, as defined in Regression coefficients from the linear mixed models that evaluated the main effects of interval (1, 3, and 6 months), absolute electric frequency-to-place mismatch at 1500 Hz, angular insertion depth (AID) of E1, and the interaction of interval and electric mismatch on speech recognition (rationalized arcsine units) for participants with default maps.
In a second set of analyses, these LMMs were expanded to include the data from the participants with place-based maps. Regression coefficients from the linear mixed models that evaluated the main effects of interval (1, 3, and 6 months), absolute electric frequency-to-place mismatch at 1500 Hz, angular insertion depth (AID) of E1, and the interaction of interval and electric mismatch on speech recognition (rationalized arcsine units) for participants with default maps and participants with place-based maps.
Additional analyses were conducted to evaluate other factors thought to affect performance in EAS users (i.e., LFPTA and age). No significant main effects were observed when the models that included the data from all participants were expanded to include LFPTA (