What is the Role of Spatial Attention in Statistical Learning During Visual Search?

Area of Science:

• Cognitive psychology
• Neuroscience
• Visual perception

Background:

• Statistical learning allows us to infer environmental regularities.
• The role of attention in statistical learning is not well understood, with mixed findings.
• Learned distractor-location suppression is a phenomenon where distractors at high-probability locations are better ignored.

Purpose of the Study:

• To investigate the role of spatial attention in statistical learning.
• Specifically, to examine if attention is necessary for learned distractor-location suppression.
• To determine if attention influences the ability to learn distractor regularities during visual search.

Main Methods:

• A preregistered study involving visual search for a target and a singleton distractor.
• Manipulation of spatial attention using informative versus neutral precues during a learning phase.
• A test phase with equiprobable distractor locations and no cues to assess learned suppression.

Main Results:

• The neutral-cue group replicated previous findings of learned distractor-location suppression.
• The informative-cue group, with diverted attention during learning, showed minimal distractor interference.
• No statistical learning of distractor locations was observed in the informative-cue group during the test phase.

Conclusions:

• Statistical learning in visual search is dependent on attention.
• Attention is necessary for developing learned distractor-location suppression.
• Intertrial priming, not statistical learning, explained minor effects in the learning phase for the attentive group.