The representational glue for incidental category learning is alignment with task-relevant behavior.

Area of Science:

• Cognitive psychology
• Auditory perception
• Machine learning

Background:

• Category learning is crucial for cognition, yet how it occurs incidentally in real-world settings remains unclear.
• Prior research shows incidental learning of auditory categories during visuomotor tasks, but factors influencing this are not fully understood.

Purpose of the Study:

• To investigate the factors supporting incidental auditory category learning.
• To examine how the alignment of auditory categories with visual features and motor responses affects incidental learning.

Main Methods:

• Three experiments manipulated the relationship between novel auditory categories and visual features (color/location) linked to a keypress response.
• Participants performed visuomotor tasks with varying degrees of alignment between auditory categories, visual features, and motor responses.

Main Results:

• Incidental auditory category learning was reliable when category exemplars consistently aligned with visuomotor demands.
• Learning failed when auditory categories were misaligned with the primary task's motor response or when participants passively observed or made generic responses.

Conclusions:

• Incidental category learning is strongly mediated by the nature of coincident behavior and task demands.
• Task-relevant feature-to-response mappings are critical for incidental category acquisition.