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Pupillary Responses Reflect Dynamic Changes in Multiple Cognitive Factors During Associative Learning in Primates
Yange Zhang 张艳歌1, Tian Wang 王天1,2, Weifeng Dai 戴伟枫1
1State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research, Beijing Normal University, Beijing 100875, China.
Summary
Pupillary responses in macaques reveal cognitive changes during associative learning. Pupil dynamics objectively track learning, reward prediction, and rule understanding in animals.
Area of Science:
- Cognitive Neuroscience
- Animal Behavior
- Neuroscience
Background:
- Associative learning involves complex cognitive factors.
- Verbal articulation is limited in animal models like macaques.
- Behavioral outputs are traditionally used to infer cognitive states in animals.
Purpose of the Study:
- To use pupillary responses as an objective measure of cognitive changes during associative learning in macaques.
- To investigate how pupil dynamics reflect underlying cognitive factors in animal learning.
- To explore the utility of pupillary responses in understanding animal psychological states during learning.
Main Methods:
- Recorded dynamic pupillary responses in three male macaques.
- Utilized a classical Pavlovian paradigm with visual stimuli and reward size associations.
- Analyzed pupillary changes in relation to interday and intraday learning processes.
Main Results:
- Gradual changes in pupillary responses correlated with evolving cognitive states during long-term learning.
- Pupillary responses were explained by a linear combination of factors: visual stimulus impact, reward value prediction, and rule understanding.
- Observed clear patterns indicating enhanced current associations and weakened previous associations during learning.
Conclusions:
- Dynamic pupillary responses serve as an objective indicator of animal psychological changes.
- Pupil dynamics provide insights into the learning process and cognitive states of animals.
- This method offers valuable tools for exploring animal behavior during associative learning.
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