Evidence for implicit self-positivity bias: an event-related brain potential study

Area of Science:

• Cognitive Psychology
• Neuroscience
• Social Psychology

Background:

• The self-positivity bias describes the tendency to view oneself more positively than others.
• Implicit biases operate unconsciously and can be revealed through behavioral and neural measures.

Purpose of the Study:

• To investigate the implicit self-positivity bias in Chinese individuals using the prime paradigm.
• To identify neural correlates, specifically event-related potentials (ERPs), associated with this bias.

Main Methods:

• Participants performed emotional judgments on personality traits presented as self- or other-related primes.
• Reaction times and electroencephalography (EEG) data, focusing on event-related potentials (ERPs), were recorded.
• Analysis focused on P300 and N400 amplitudes in response to self- and other-related stimuli.

Main Results:

• Behaviorally, faster reaction times were observed for self-related positive and other-related negative adjectives.
• Event-related potentials (ERPs) demonstrated an interaction between prime and emotion at the P300 amplitude, with larger amplitudes for self-positivity congruent information.
• Increased N400 amplitudes were found for stimuli inconsistent with the self-positivity bias, suggesting greater processing difficulty.

Conclusions:

• The study provides behavioral and neural evidence for an implicit self-positivity bias in Chinese individuals.
• P300 and N400 amplitudes serve as reliable neuro-indexes for the implicit self-positivity bias.
• Self-related information processing is modulated by attentional resource allocation, consistent with the self-positivity bias.