Physiological and behavioral binaural measures agree with each other but not with pitch matching.

Evidence

The general trends were: (1) Pairwise pitch comparison results highly depend on the participant’s clinical frequency-place fitting map. The matched pair indicates a similar frequency range in the map, except for one subject which was implanted only 9 months before the experiment. (2) Both BIC and IPTD based pairing results indicate a large 2–3 electrode mismatch for some subjects. There is clear correlation between the mismatches indicated by these two methods. (3) In line with Poon et al. ( 2009 ) there is no correlation between the pitch matched pairs and the IPTD matched pair and in line with He et al. ( 2012 ) there is no correlation between the pitch matched pairs and the BIC matched pair. — Dijk, Pim van, Physiology, Psychoacoustics and…, 1470

Categorization

• XREF: The dissociation between pitch-perception measures and binaural-physiology measures resonates with broader questions in auditory neuroscience about independent coding pathways.
• SEED: Potential article: why the clinical default of pitch-matching for bilateral implant pairing may be systematically wrong, and what a better evidence-based protocol could look like.