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Working memory in the chick: parallel and lateralized mechanisms for encoding of object- and position-specific
Lucia Regolin1, Beatrice Garzotto, Rosa Rugani
1Department of General Psychology, University of Padua, Via Venezia 8, 35131 Padova, Italy. lucia.regolin@unipd.it
Behavioural Brain Research
|December 25, 2004
Summary
Chicks use object and position cues in working memory. When cues conflict, the right hemisphere favors position, while the left favors objects, showing hemispheric specialization in chicks.
Area of Science:
- Neuroscience
- Animal Behavior
- Cognitive Science
Background:
- Working memory is crucial for decision-making.
- Understanding hemispheric specialization provides insights into cognitive processes.
Purpose of the Study:
- To investigate how chicks (Gallus gallus domesticus) utilize object- and position-specific information in working memory.
- To determine if there is hemispheric asymmetry in processing conflicting cues during a delayed-response task.
Main Methods:
- Chicks performed a delayed-response task involving a hidden goal behind one of two screens.
- Object and position cues were manipulated, sometimes presented in conflict or agreement.
- Monocular (left-eyed, right-eyed) and binocular vision conditions were tested.
Main Results:
- Chicks successfully used either object or position cues when presented alone or in agreement.
- When object and position cues conflicted, left-eyed and binocular chicks favored position, while right-eyed chicks showed mixed responses.
- Novelty preference was observed in monocular chicks, but not binocular chicks.
Conclusions:
- Both cerebral hemispheres in chicks process object- and position-specific information in working memory.
- Hemispheric specialization is evident during cue conflict: the right hemisphere prioritizes spatial/positional information, and the left hemisphere prioritizes object information.