Comparing and modeling absolute auditory thresholds in an alternative-forced-choice and a yes-no procedure

Area of Science:

• Auditory Neuroscience
• Psychoacoustics
• Human Perception

Background:

• Sound detection in quiet is a fundamental auditory task.
• Mechanisms underlying auditory detection thresholds remain debated.
• Thresholds depend on sound properties and experimental procedures.

Purpose of the Study:

• To investigate how different psychophysical procedures influence auditory detection thresholds.
• To compare the efficacy of alternative-forced-choice versus yes-no procedures.
• To evaluate a Poisson-based signal detection model against experimental findings.

Main Methods:

• Measured human auditory detection thresholds for multi-burst sounds.
• Employed both alternative-forced-choice and yes-no procedures within the same sessions.
• Analyzed the influence of stimulus duration and false alarm rates on thresholds.

Main Results:

• Yes-no procedure thresholds were generally higher than alternative-forced-choice thresholds.
• The discrepancy between procedures diminished with increasing stimulus duration.
• Threshold differences varied across subjects and were influenced by false alarm probabilities.

Conclusions:

• A previously proposed Poisson-based signal detection model effectively explains the observed threshold variations.
• The model accurately predicts psychometric function shapes and accounts for procedural dependencies.
• Findings provide further validation for the proposed auditory detection model.