Longer pre-change sampling durations speed auditory change detection.

Evidence

The ability of subjects to detect a change in stimulus statistics (Fig. 1a ) improved with the time they were allowed to listen to the initial statistics of the texture (Fig. 1d , progression along ordinate, performance measured as hit rate, p < 10‑6 , Friedman test). Hit rate increased monotonically to an asymptotic level for all change sizes (4 levels, [50, 80, 110, 140] %). Asymptotic hit rate depended on the change size, with bigger changes in marginal probability leading to greater asymptotic hit rate (Fig. 1d , different colours). Although asymptotic hit rate was above chance (26.6 %) for all change sizes, the increase with change size was large and significant (from 50 to 95 %, p < 10‑7 , Friedman test). Change size also influenced the shape of the dependence on change time, such that greater change sizes lead to improved hit rate already for shorter change times (Fig. 1d ). This translates to a combined steepening and leftward shift of the hit rate curves with change size. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3327

The ability of subjects to detect a change in stimulus statistics (Fig. 1a ) improved with the time they were allowed to listen to the initial statistics of the texture (Fig. 1d , progression along ordinate, performance measured as hit rate, p < 10‑6 , Friedman test). Hit rate increased monotonically to an asymptotic level for all change sizes (4 levels, [50, 80, 110, 140] %). Asymptotic hit rate depended on the change size, with bigger changes in marginal probability leading to greater asymptotic hit rate (Fig. 1d , different colours). Although asymptotic hit rate was above chance (26.6 %) for all change sizes, the increase with change size was large and significant (from 50 to 95 %, p < 10‑7 , Friedman test). — Dijk, Pim van, Physiology, Psychoacoustics and…, 3328

As a function of change time, the reaction time distribution changed in a qualitatively similar manner, however, less pronounced (Fig. 2e ). Median reaction times correlated negatively with change times, mirroring dependence of hit rate on change times (p < 0.001; Fig. 2f ). This dependence can already be seen in the raw data (Fig. 1c ), where hit trials (black) for longer change times exhibit shorter reaction times. Again the onset time decreased correspondingly with longer change time, suggesting more accurate estimation of the initial statistics. — Dijk, Pim van, Physiology, Psychoacoustics and…, 3285

Categorization

• corroborated: 3 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 3327; Dijk, Pim van, Physiology, Psychoacoustics and…, 3328; Dijk, Pim van, Physiology, Psychoacoustics and…, 3285