ANSD patients have triple the temporal gap detection thresholds of normal listeners

Evidence

Post hoc Tamhane’ T2 correction test analysis indicated that the mean TGD thresholds for both ears was significantly higher in the listeners with ANSD (11.9 ms) than in the listeners with SNHL (4.0 ms; p < 0.001) and in the NH (3.9 ms; p < 0.001) listeners; while the subjects with SNHL had the TGD thresholds close to normal. It is notable that the variability in TGD thresholds for the ANSD subjects was very large, ranging from normal limits to 10 times the norm. This result indicates that the SNHL subjects had normal temporal resolution as long as the audibility was compensated, but a majority of the subjects with ANSD had poor temporal resolution in the present study. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3393

Categorization

• XREF: The near-complementary dissociation — SNHL poor frequency/temporal normal, ANSD temporal poor/frequency normal — is a clean double dissociation pattern; echoes similar double dissociations in other sensory systems in my notes.