Attentional capture by evaluative stimuli: gain- and loss-connoting colors boost the additional-singleton effect

Area of Science:

• Cognitive Psychology
• Neuroscience
• Visual Perception

Background:

• Attentional capture refers to the involuntary redirection of attention by salient stimuli.
• Previous research suggests negative stimuli may have a preferential effect on attention (negativity bias).
• Understanding factors influencing attentional capture is crucial for explaining human perception and behavior.

Purpose of the Study:

• To investigate whether stimuli with positive or negative valence capture attention more strongly than neutral stimuli.
• To test whether general stimulus relevance or a negativity bias primarily drives attentional capture.
• To examine the impact of task-irrelevant valenced stimuli on visual search performance.

Main Methods:

• Participants completed a valence induction task, associating colors with monetary gains (positive valence) or losses (negative valence).
• A visual search task was employed, with trials featuring task-irrelevant singletons of positive, negative, or neutral colors.
• Reaction times (RTs) to identify targets were measured to assess the additional-singleton effect.

Main Results:

• An additional-singleton effect was observed, with longer RTs when a singleton color was present compared to no singleton.
• This effect was significantly larger for both positive and negative valenced colors compared to neutral colors.
• No significant difference was found between the attentional capture effects of positive and negative valenced colors.

Conclusions:

• The findings support the hypothesis that general stimulus relevance, irrespective of valence, drives attentional capture.
• The results challenge the negativity bias hypothesis, indicating that positive valence is equally effective in capturing attention.
• Valenced stimuli, whether positive or negative, possess a heightened capacity to elicit attentional capture in visual search.