NRT vs Rate preference
As mentioned in the introduction, besides T and C levels there are other parameters that could be important for performance and client satisfaction. An important one is the rate of stimulation, we know that faster is not always better and that one person can do better with an 1800 Hz map and another can do better with an 500 Hz map. Shpak et al. (2004) performed a study where they tried to correlate auditory nerve recovery times (measured with NRT) to rate preference. Indeed, it was observed that in two groups, one that preferred faster rates, and one that preferred slower rates, there was a significant difference in average recovery time between the two groups.
However, the group that preferred slower rates (N=6) contained 4 congenitally deaf recipients, and the faster group (N=5) contained none, this may mean that the correlation could be spurious, meaning that duration of deafness is the predictor for rate preference, not recovery. This needs further investigation.
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