Emotionally anesthetized: media violence induces neural changes during emotional face processing

Area of Science:

• Neuroscience
• Psychology
• Media Studies

Background:

• Media violence exposure is linked to increased aggression and reduced prosocial behavior.
• This desensitization may stem from altered emotional face processing after media violence exposure.

Purpose of the Study:

• To investigate the neural correlates of emotional face processing after media violence exposure.
• To examine how media violence affects event-related potentials (ERPs) associated with face perception.

Main Methods:

• Scalp electroencephalography (EEG) was used to record neural activity.
• Participants viewed either a violent or nonviolent film clip.
• Following the film, participants completed a gender discrimination stop-signal task using emotional faces.

Main Results:

• Exposure to media violence did not alter the early visual P100 component.
• A decrease in N170 and P200 amplitudes was observed after viewing violent films, indicating suppressed holistic face and emotional processing.
• Increased frontal N200/P300 amplitude was noted in participants exposed to violent media.

Conclusions:

• Media violence exposure appears to suppress neural responses related to holistic face processing and implicit emotional understanding.
• Increased frontal N200/P300 suggests that media violence may lead to cognitive desensitization, reducing the resources needed for behavioral inhibition.