Sign tracking predicts suboptimal behavior in a rodent gambling task

Area of Science:

• Neuroscience
• Behavioral Science
• Addiction Research

Background:

• Reward-associated cues can drive maladaptive behaviors like risky decision-making in gambling.
• Sign tracking, a tendency to interact with reward cues over reward sites, indicates motivational value transfer to cues.
• The link between sign tracking and risky decision-making is not well understood.

Purpose of the Study:

• To investigate if sign tracking predicts risky choice behavior.
• To examine the effects of dopaminergic drugs on gambling behavior in sign-tracking versus goal-tracking rats.

Main Methods:

• Rats were assessed for sign tracking using a Pavlovian conditioned approach task.
• Rats were trained on a rodent gambling task (rGT) with reward-predictive cues.
• The effects of D-amphetamine, quinpirole, and PD128907 on gambling behavior were evaluated.

Main Results:

• Higher sign tracking correlated with poorer performance on the rGT, including more high-risk choices and impulsive decisions.
• D-amphetamine altered choice allocation, while quinpirole and PD128907 reduced impulsivity.
• Drug effects on gambling behavior were consistent between sign-tracking and goal-tracking rats.

Conclusions:

• Sign tracking, a measure of cue reactivity, is a significant predictor of risky and impulsive choices in cue-rich gambling environments.
• Assessing sign tracking behavior could help identify individuals susceptible to pathological gambling.
• Sign tracking may also predict treatment effectiveness for gambling disorders.