Abstract
Rationale
Reward-associated cues can promote maladaptive behavior, including risky decision-making in a gambling setting. A propensity for sign tracking over goal tracking—i.e., interaction with a reward-predictive cue rather than the site of reward—demonstrates an individual’s tendency to transfer motivational value to a cue. However, the relationship of sign tracking to risky decision-making remains unclear.
Objectives
To determine whether sign tracking predicts risky choice, we used a Pavlovian conditioned approach task to evaluate the tendency of male rats to sign track to a lever cue and then trained rats on a rodent gambling task (rGT) with win-associated cues. We also tested the effects of d-amphetamine, quinpirole (a D2/D3 receptor agonist), and PD128907 (a D3 receptor agonist) on gambling behavior in sign tracker and goal tracker individuals.
Results
Increased sign tracking relative to goal tracking was associated with suboptimal performance on the rGT, including decreased selection of the optimal choice, increased selection of a high-risk/high-reward option, and increased impulsive premature choices. Amphetamine increased choices of a low-risk/low-reward option at the expense of optimal and high-risk choices, whereas quinpirole and PD128907 had little effect on choice allocation, but reduced impulsivity. Drug effects were similar across sign tracker and goal tracker individuals.
Conclusions
Cue reactivity, as measured by sign tracking, is predictive and may be an important driver of risky and impulsive choices in a gambling setting laden with salient audiovisual cues. Evaluating an individual’s sign tracking behavior may be an avenue to predict vulnerability to pathological gambling and the efficacy of treatments.
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Acknowledgements
We would like to thank Nicholas Simon and Mary Torregrossa for their helpful comments on the manuscript.
Funding
This work was supported by an award from the International Center for Responsible Gaming (ICRG), an award from the University of Pittsburgh Medical Center Competitive Medical Research Fund (CMRF), and National Institutes of Health grant R03DA045913.
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Swintosky, M., Brennan, J.T., Koziel, C. et al. Sign tracking predicts suboptimal behavior in a rodent gambling task. Psychopharmacology 238, 2645–2660 (2021). https://doi.org/10.1007/s00213-021-05887-8
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DOI: https://doi.org/10.1007/s00213-021-05887-8