Social feedback enhances learning in Williams syndrome

Area of Science:

• Neuroscience
• Genetics
• Cognitive Psychology

Background:

• Williams syndrome (WS) is a rare genetic disorder associated with significant social interest and intellectual disability.
• Individuals with WS may perceive social stimuli as having higher intrinsic reward value, but its impact on learning and decision-making remains unclear.
• Genes implicated in WS are linked to sociability, positioning WS as a model for studying the social brain.

Purpose of the Study:

• To investigate whether social feedback influences probabilistic reinforcement learning in individuals with Williams syndrome.
• To compare the effects of social versus non-social rewards on learning in WS and control groups.
• To explore the computational mechanisms underlying social feedback's impact on reward learning in WS.

Main Methods:

• Probabilistic reinforcement learning tasks were administered using either social or non-social rewards for correct choices.
• Learning performance was compared between individuals with Williams syndrome, typically developing controls, and individuals with other intellectual disabilities.
• Computational modeling was employed to analyze the effects of social feedback on reward processing and choice consistency.

Main Results:

• Social feedback significantly improved learning performance in individuals with Williams syndrome.
• Typically developing controls and individuals with other intellectual disabilities did not show similar improvements with social feedback.
• Computational models revealed that social feedback shifted reward processing towards greater weight on rewards over punishments and increased choice consistency in WS.

Conclusions:

• Reward learning in Williams syndrome is characterized by high volatility and a bias towards avoiding punishment over seeking rewards.
• Social feedback can partially normalize this learning pattern in WS, promoting more adaptive reward-based decision-making.
• These findings highlight the crucial role of social interaction in modulating learning and cognitive function in Williams syndrome.