Accuracy and consistency of absolute pitch

Area of Science:

• Auditory perception
• Psychoacoustics
• Music cognition

Background:

• Absolute pitch (AP) is the ability to identify or produce a specific musical note without a reference tone.
• Previous research indicated variability in AP judgments over time.
• Understanding the long-term stability and fluctuations of AP is crucial for auditory science.

Purpose of the Study:

• To assess the long-term accuracy and consistency of absolute pitch (AP) judgments.
• To investigate the persistence of previously observed drifts and cyclical variations in AP.
• To determine the underlying consistency of AP estimates after accounting for temporal fluctuations.

Main Methods:

• Longitudinal studies measuring AP judgments in multiple subjects over periods of up to forty years.
• Analysis of pitch perception variations within a day and across longer time scales.
• Calculation of AP consistency using standard deviation after removing temporal effects.

Main Results:

• Observed drifts and cyclical variations in AP judgments persisted across two decades.
• Similar cyclical variations in pitch perception were suggested in subjects studied over forty years.
• Daily variations in pitch judgments were noted, indicating nonrandom fluctuations.
• Underlying AP consistency, measured by standard deviation after removing temporal effects, ranged from 3.1 to 4.5 Hz.
• The consistency of AP judgments using an oscillator depended on the accuracy of those judgments.

Conclusions:

• Absolute pitch judgments are subject to persistent, nonrandom temporal variations, including daily and long-term cyclical patterns.
• The underlying consistency of AP, when temporal effects are controlled, is quantifiable and varies among individuals.
• The accuracy of AP judgments influences their consistency, particularly when using instrumental aids.