Odd-item search in pigeons: display size and transfer effects

Area of Science:

• Cognitive science and animal behavior.

Background:

• Pigeons (Columba livia) have demonstrated capabilities in visual search tasks.
• Understanding avian visual perception is key to comparative cognition studies.

Purpose of the Study:

• To investigate pigeon visual search performance with varying numbers of distractors.
• To determine if pigeons possess a general "oddity concept" in visual search.

Main Methods:

• Pigeons searched computer-presented arrays of small forms.
• Target and distractor forms were systematically varied across trials and experiments.
• Accuracy and search speed were measured in relation to distractor quantity and novelty.

Main Results:

• Search accuracy and speed improved as the number of identical distractor forms increased.
• Performance was above chance for novel targets and distractors only in large (24-item) displays, indicating significant transfer.
• No evidence supported a general "oddity concept" in pigeons.

Conclusions:

• Pigeon visual search performance is influenced by perceptual isolation of the target.
• Familiarity with target-distractor combinations significantly impacts odd-item performance in pigeons.
• Results suggest a more nuanced understanding of avian visual search strategies beyond a general oddity concept.