Melodic and harmonic chromatic interval processing by pigeons (Columba livia)

Area of Science:

• Comparative psychology
• Animal cognition
• Bioacoustics

Background:

• Human musicality's origins are unclear.
• Studying nonhuman animals offers insights into musicality's evolution.
• Pigeons possess advanced auditory capabilities.

Purpose of the Study:

• Investigate pigeons' ability to discriminate chromatic scale intervals.
• Determine if pigeons perceive musical consonance and dissonance.
• Explore the evolutionary basis of music perception.

Main Methods:

• Auditory go/no-go same/different task with four trained pigeons.
• Discrimination of varying semitone intervals using cello, organ, and pure tones.
• Testing in successive melodic and simultaneous harmonic contexts.

Main Results:

• Pigeons discriminated pitch interval distances.
• Little evidence for human-like perception of musical consonance (e.g., perfect fifth, octave).
• Limited evidence for perception of musical dissonance (e.g., tritone, major seventh).

Conclusions:

• Pigeons are sensitive to pitch but lack core music perception capacities.
• Findings suggest limitations in the evolutionary origins of music perception.
• Pigeons demonstrate sophisticated auditory processing beyond prior assumptions.