Lateral asymmetry of impression formation.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Social Psychology

Background:

• Complex cognitive functions are often asymmetrically represented in the human brain.
• Cerebral hemisphere activation patterns may influence social perception and impression formation.

Purpose of the Study:

• To investigate if relative activation of cerebral hemispheres affects impressions of others.
• To explore the role of attentional orientation in modulating hemispheric activation and social judgment.

Main Methods:

• Manipulating selective brain hemisphere activation through induced lateral orientation of attention.
• Assessing impression formation in right-handed individuals based on attentional direction.
• Replicating findings in a main experiment after a pilot study.

Main Results:

• A pilot study showed right-handers formed significantly more positive impressions when their right hemisphere was activated via leftward attentional orientation.
• This effect was successfully replicated in the main experiment, confirming the initial findings.
• Hemispheric activation correlated with attentional focus: left hemisphere activation enhanced self-attention, while right hemisphere activation boosted external attention.

Conclusions:

• Relative cerebral hemisphere activation, modulated by attentional orientation, significantly influences the formation of social impressions.
• Findings support the link between hemispheric asymmetry, attentional processes, and social cognition.
• The study provides evidence for the differential roles of brain hemispheres in processing self versus external information.