Neuronal substrate of choice

How do animals make choices in a changing and uncertain environment? In this project, we look at the ways animals assess a choice after it has been made in terms of the expected outcome. In a discrete trial paradigm we look for the neuronal and behavioural correlates of choice confidence. Rats initiate each trial which consists of a choice between two drinking spouts that differ in their probability of delivering a sucrose solution. Critically, sucrose is delivered after a variable delay – this introduces a moment-by-moment uncertainty in reward presentation and allows us to characterise the behavioural profile during the window between the time of choice and its outcome. The post-choice lick-response profiles reveal that rats spend more time at the spout with the higher reward probability and exhibit a sparser lick pattern.