Look on the bright side: Positivity bias modulates interference effects in the simon task

Area of Science:

• Cognitive Psychology
• Social Psychology
• Neuroscience

Background:

• Facial emotion recognition involves distinct processing speeds for positive and negative stimuli.
• Previous research suggests faster detection of negative faces but slower categorization.
• The underlying mechanisms of this dissociation, particularly concerning attentional processes, require further investigation.

Purpose of the Study:

• To investigate stimulus- and response-related processes underlying the dissociation in processing positive and negative faces.
• To examine whether early attentional processes are influenced by emotional valence, specifically testing for a positivity bias.
• To determine the impact of emotional face processing on spatial attention using a Simon task.

Main Methods:

• Employed a Simon task paradigm to assess stimulus- and response-related effects.
• Utilized positive, negative, and neutral stimuli (faces and non-face stimuli like arrows).
• Measured reaction times and Simon effects to infer attentional and response processes.

Main Results:

• Negative faces elicited reduced Simon effects compared to positive faces.
• This reduction in Simon effects unexpectedly transferred to neutral stimuli associated with negative-face responses.
• Spatial attention was biased away from the response side linked to negative faces, indicating an early attentional bias.

Conclusions:

• Early attentional processes, similar to higher-level cognitive decisions, are subject to a positivity bias (Pollyanna effect).
• The findings suggest a modulation of spatial attention based on the valence of emotional stimuli.
• Emotional valence influences not only perception but also the fundamental mechanisms of spatial attention.