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Examining Goal-directed Behavior Under Stress Using Olfactory Pavlovian-Instrumental Transfer
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Examining Goal-directed Behavior Under Stress Using Olfactory Pavlovian-Instrumental Transfer

Kieran Patrick Holmes
Master of Science (MS), Brandeis University
2026
DOI:
https://doi.org/10.48617/etd.1650

Abstract

Conditioning Decision making Goal-directed behavior Psychosocial stress Reward-guided behavior Stress-induction Behavioral psychology
The decisions we make can be influenced by our environment. Daily stress can impact our perception, cognition, and actions. The established model posits that acute stress diminishes goal-directed control during reward-guided decision making, fostering a shift toward habitual action and promoting suboptimal behavior. However, recent evidence contradicts this notion and calls into question whether goal-directed behavior can remain intact under stress. Here, we used the Maastricht Acute Stress Test (MAST) in conjunction with an olfactory-based Pavlovian instrumental transfer (PIT) task to evaluate goal-directed responding toward coffee and food rewards. Participants that underwent stress induction did not differ in their responding compared to non-stressed controls. Both groups demonstrated outcome-specific PIT, indicating goal directed behavior. This PIT effect appeared robust, signaling the efficacy of a PIT task with ecologically relevant stimuli and rewards. These results suggest that goal-directed control can be preserved under stress, and that the stress-habit link should be further reexamined to delineate any boundary conditions or contingencies regarding the effects of acute stress on decision making.
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