ITD sensitivity is not explained by basic temporal-structure processing efficiency.

Evidence

The thresholds for the HUGGINS task showed a significant positive correlation with those for the TIME task (r = 0.50, p = 0.004), but not with those for the ITD task (r = 0.11, p = 0.553). This suggests that the performances of the TIME and HUGGINS tasks capture inter-individual variation of the efficiency of temporal-structure processing, but that of the ITD task is determined primarily by other factors. … The HUGGINS and ITD tasks are similar in that both require interaural comparison of temporal-structure information, but differ in the perceptual domain in which listeners are expected to respond (i.e., pitch versus laterality). — Dijk, Pim van, Physiology, Psychoacoustics and…, 1026

Categorization

• QUESTION: What other factors then determine ITD sensitivity? The paper suggests something beyond monaural temporal coding.