Fatal attraction: ventral striatum predicts costly choice errors in humans

Area of Science:

• Neuroscience
• Behavioral Economics
• Decision Science

Background:

• Organisms exhibit approach behavior towards rewards and associated cues, even when disadvantageous.
• This innate tendency can persist even when detrimental to achieving primary goals.

Purpose of the Study:

• To investigate the biological underpinnings of financially costly approach behavior in humans.
• To determine if neural responses during reward learning predict future costly behaviors.

Main Methods:

• Subjects underwent a Pavlovian learning task to predict erotic rewards.
• Neuronal activity in the ventral striatum was recorded during the learning task.
• Approach behavior was assessed via an active choice task months later.

Main Results:

• Ventral striatum responses during learning stably predicted later financially costly approach behavior.
• Individual differences in approach behavior were identified.
• A link between reward learning neural signals and costly decisions was established.

Conclusions:

• Neural signals during reward prediction are linked to costly approach tendencies.
• Approach behavior may override rational decision-making, leading individuals to act against their own financial interests.
• Findings offer insights into the neurobiology of costly choices and self-interest.