When we cannot speak: Eye contact disrupts resources available to cognitive control processes during verb generation

Area of Science:

• Cognitive Psychology
• Neuroscience
• Communication Studies

Background:

• Eye contact and verbal processing are crucial for communication but seem independent.
• Frequent eye aversion during conversation suggests underlying interference.
• This interference may stem from shared cognitive resources.

Purpose of the Study:

• To investigate the interference between eye contact and verb generation.
• To explore if eye contact influences cognitive resource allocation during verbal tasks.
• To test the hypothesis that both processes utilize a domain-general cognitive system.

Main Methods:

• Participants viewed movies of faces with either direct or averted eye gaze.
• Verb generation tasks (retrieval and selection) were performed simultaneously.
• Reaction times for verb generation were measured under different eye contact conditions.

Main Results:

• Direct eye contact significantly delayed verbal generation compared to averted gaze.
• This delay was pronounced specifically when both verb retrieval and selection demands were high.
• The findings indicate a shared cognitive resource limitation.

Conclusions:

• Eye contact shares domain-general cognitive resources with verb generation.
• Interference between verbal and non-verbal communication channels is significant.
• Understanding communication requires considering the interplay of verbal and non-verbal processing.