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Temporal-interval discrimination task: on each trial, listeners were required to choose in which of two presentations the time between two brief tone pips was longer. The duration between the pips was always a standard value (t) in one randomly selected presentation and a longer, comparison value in the other (t + Δt). The Δt at which listeners could discriminate the comparison from the standard stimulus on 79% of trials, termed “threshold,” was estimated using an adaptive technique.
