Pitch discrimination passes are set by binomial significance thresholds on a fixed trial count.

Evidence

A two-interval two-alternative forced choice paradigm was used. A single presentation consisted of two intervals in which the higher tone was randomly assigned to either the first or second interval, and the listener indicated which interval sounded higher in pitch. The 2 tones/pulses were presented sequentially with duration of 1000 ms and were 500 ms apart. Five pairs of tones/pulses were initially presented and responses recorded. If the participant got all five correct the pair was considered discriminable. If they scored less than five a further five presentations were given and scored. If the participant got eight out of ten presentations correct the pair passed. This was based on binomial significance at the p < 0.05 level (Skellam 1948 ). — Dijk, Pim van, Physiology, Psychoacoustics and…, 2080

Categorization

• XREF: The 8-of-10 binomial criterion pattern echoes the classic ABX and forced-choice discrimination criteria found across psychoacoustic methods literature.