Reward positivity affects temporal interval production in a continuous timing task.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Computational Neuroscience

Background:

• Neural circuits for reward processing and interval timing are interconnected.
• Previous research primarily explored reward's effect on interval perception, not production.
• The impact of performance-contingent reward on temporal interval production remains unclear.

Purpose of the Study:

• To investigate if performance feedback, a form of reward, biases interval production.
• To examine the neural mechanisms underlying reward's influence on timing behavior.

Main Methods:

• Recorded electroencephalography (EEG) from 20 participants during a continuous drumming task.
• Participants performed 1728 trials at realistic tempos, receiving immediate color-coded feedback.
• Utilized regression-based EEG analysis to isolate the reward positivity (RewP) response.

Main Results:

• Reward positivity (RewP) amplitude significantly predicted timing behavior for the subsequent beat.
• This effect demonstrates a performance-biasing influence of reward feedback on interval production.
• The findings highlight the necessity of continuous paradigms for observing such rapid effects.

Conclusions:

• Fluctuations in reward-related anterior cingulate cortex activity impact timing.
• The study provides evidence for the functional intertwining of reward processing and interval production.
• Continuous tasks are crucial for revealing the dynamic interplay between reward and timing.