Social conformity is due to biased stimulus processing: electrophysiological and diffusion analyses.

Area of Science:

• Cognitive Neuroscience
• Social Psychology

Background:

• Human decision-making is significantly influenced by others' opinions, even in simple perceptual tasks.
• The neurocognitive mechanisms underlying this social conformity effect require further elucidation, particularly regarding early perceptual processing.

Purpose of the Study:

• To investigate whether social influence biases early perceptual processes in decision-making.
• To uncover the neurocognitive underpinnings of social conformity in perceptual tasks using advanced analytical methods.

Main Methods:

• Utilized stimulus-evoked potentials and lateralized readiness potentials (LRPs) to examine neural activity.
• Employed diffusion model analysis on reaction time data to assess information processing.
• Investigated attentional resource allocation via N1-amplitude measurements.

Main Results:

• Diffusion model analysis indicated that social conformity stems from biased stimulus information uptake and more thorough processing.
• Increased N1-amplitudes demonstrated that social influence enhances early attentional resources for stimulus identification.
• Lateralized readiness potentials (LRPs) revealed processing biases even in non-conformity instances.

Conclusions:

• Social influence prompts individuals to selectively process stimulus information aligning with others' opinions, inducing conformity.
• This effect persists even when individuals engage in careful information processing rather than blind adherence to the majority.