Fig 1.
Signal processing workflow to generate the channel interaction experimental conditions.
See text for further detail. 1. binaural broad (L12R12): Bilateral CI simulation with broad channel interaction within each ear but no inter-aural mismatch. 2. binaural limited (L48R48): Bilateral CI simulation with limited channel interaction within each ear and no inter-aural mismatch. 3. mixed-limited-broad (L48R12): Bilateral CI simulation with limited channel interaction within the left ear and broad channel interaction within the right ear.
Fig 2.
Speech recognition thresholds (SRTs) by listening condition.
Smaller SRTs, at higher positions on the y-axis, indicate better recognition of test material (i.e. at more challenging signal to noise ratios). Colored points represent individual listener responses; points are horizontally jittered for readability. Boxes indicate interquartile range and whiskers 1.5 x the interquartile range in each direction. Black horizontal lines indicate the median and notches represent 95% confidence intervals surrounding the median.
Fig 3.
SRTs by channel interaction condition.
Smaller SRTs, at higher positions on the y-axis, indicate better recognition of test material (i.e. at more challenging signal to noise ratios). Colored points represent individual listener responses; gray lines connect listener-level SRTs across masking conditions. Boxes indicate interquartile range and whiskers 1.5 x the interquartile range in each direction. Black horizontal lines indicate the median.
Table 1.
Descriptive statistics of SRTs (dB) by listening condition: Mean (SD) range.
Table 2.
Model predicting the effect of listening condition upon SRTs.
Fig 4.
SRM (diotic-dichotic) by channel interaction condition.
Higher values indicate greater benefit from dichotic over diotic listening conditions. Points represent individual listener responses; gray lines connect listener-level SRM values across channel interaction conditions. Boxes indicate interquartile range and whiskers 1.5 x the interquartile range in each direction. Black horizontal lines indicate the median and notches represent 95% confidence intervals surrounding the median.
Table 3.
Model predicting the effect of channel interaction condition upon SRM.