Jackdaws form categorical prototypes based on experience with category exemplars.

Area of Science:

• Cognitive ethology
• Animal behavior and cognition

Background:

• Categorization is a fundamental cognitive ability crucial for efficient animal behavior.
• Corvids demonstrate advanced categorization skills, but their learning strategies require further elucidation.

Purpose of the Study:

• To investigate categorization learning strategies in jackdaws using artificial stimuli.
• To compare learning outcomes between category introduction via prototypes versus diverse exemplars.

Main Methods:

• Two jackdaws were trained on a delayed match-to-category task with novel "RUBubbles" stimuli.
• Two learning protocols were employed: low variability (central prototypes) and high variability (diverse exemplars).
• Categorization performance was analyzed based on stimulus similarity to category prototypes.

Main Results:

• Jackdaws consistently utilized a central category prototype to determine category membership, irrespective of the learning protocol.
• Prototype reliance emerged rapidly, even after minimal exposure to category exemplars.
• High stimulus variability prolonged initial learning without enhancing subsequent generalization.

Conclusions:

• Jackdaws employ an adaptive, efficient prototype-based strategy for categorization, inferring or utilizing central category representations.
• This study establishes jackdaws as a valuable model for studying category representation and learning in highly cognitive species.