Figure 4

Bilateral advantage for speech perception. (a) Mean ± SE bilateral speech perception accuracy was greater in quiet than in noise for all groups. Simultaneous bilateral cochlear (CI) implant users were more accurate than bimodal users (post-hoc Tukey HSD comparison p < 0.05). (b) Bilateral advantage was calculated as: bilateral - unilateral speech perception. Mean ± SE bilateral advantage is provided. In quiet, all groups experienced bilateral benefit over listening with only one ear. There was a group x ear interaction in bilateral advantage. The bilateral advantage to speech perception was greater compared with HA/CI2 alone versus CI1 alone for bimodal and sequential users. The bilateral advantage over HA/CI2 was greater for bimodal and sequential users than both simultaneous and older simultaneous groups. Gray lines indicate significant post-hoc Tukey HSD comparisons (p < 0.05). (c) The bilateral advantage over listening with only CI1 was greater in noise than quiet across groups (main effect of condition only).