Uncertainty is associated with increased selective attention and sustained stimulus processing.

Area of Science:

• Cognitive Neuroscience
• Psychology
• Neuroscience

Background:

• Uncertainty regarding future threats is linked to overestimating threat probability.
• This overestimation is hypothesized to increase attentional allocation.
• Attentional dynamics under uncertainty are crucial for understanding defensive motivation.

Purpose of the Study:

• To investigate uncertainty-related dynamics in attentional allocation using event-related potentials (ERPs).
• To examine how uncertainty influences the brain's response to predictable and unpredictable stimuli.
• To understand the neural mechanisms underlying attentional prioritization driven by threat uncertainty.

Main Methods:

• Utilized event-related potentials (ERPs) for high temporal resolution analysis of attention.
• Employed a picture-viewing task with cues predicting subsequent picture valence (certain-neutral, certain-aversive, uncertain).
• Measured participants' subjective valence ratings and ERP components (P2, LPP) in response to cued pictures.

Main Results:

• Participants overestimated aversive picture frequency after uncertain cues, indicating expectancy and covariation biases.
• Subjective valence ratings for aversive pictures were lower following uncertain cues.
• Increased P2 and LPP amplitudes were observed for unpredictably cued pictures, particularly neutral ones, suggesting enhanced attention.

Conclusions:

• Uncertainty about future threat enhances early phasic and sustained attention for uncertainly cued targets.
• Defensive motivation related to threat uncertainty drives specific attentional dynamics.
• Prioritization occurs at various processing stages, especially for nonthreatening stimuli that violate expectations.