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Monetary reward magnitude effects on behavior and brain function during goal-directed behavior.
P Rosell-Negre1, J C Bustamante2, P Fuentes-Claramonte1
1Departamento de Psicología Básica, Clínica y Psicobiología, Universitat Jaume I, Castellón, Av. de Vicent Sos Baynat, s, /n 12071, Castelló de la Plana, Spain.
Brain Imaging and Behavior
|July 31, 2016
Summary
Monetary rewards enhance goal-directed behavior and cognitive control, particularly in the prefrontal cortex and striatum. Individual differences in reward sensitivity correlate with performance improvements, highlighting the role of incentives in executive functions.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Decision Science
Background:
- Reward processing influences goal-directed behavior and cognitive control.
- Individual personality traits, such as reward sensitivity, may modulate these effects.
- Understanding the neural mechanisms of reward modulation is crucial for cognitive enhancement.
Purpose of the Study:
- To investigate how varying monetary reward magnitudes affect brain activation and performance during goal-directed tasks.
- To examine the relationship between individual reward sensitivity and the modulation of cognitive control by monetary incentives.
Main Methods:
- fMRI (functional Magnetic Resonance Imaging) was used to scan 37 participants.
- A parametric design varied monetary reward magnitudes (€0, €0.01, €0.5, €1, €1.5) during a Stroop task.
- Behavioral performance and brain activity in the left dorsolateral prefrontal cortex (DLPFC) and striatum were analyzed.
Main Results:
- Brain activity in the left dorsolateral prefrontal cortex (DLPFC) and striatum showed modulation with increasing and decreasing reward magnitudes, respectively.
- Behavioral performance improved significantly with higher monetary rewards compared to no or minimal reward conditions.
- Performance improvements were correlated with individual differences in reward sensitivity.
Conclusions:
- Monetary incentives modulate cognitive control processes in brain regions like the DLPFC and striatum.
- The influence of monetary incentives on cognitive control overlaps with neural regions typically involved in executive functions.
- Individual reward sensitivity plays a role in how effectively monetary incentives enhance goal-directed behavior.
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