Perceptual distraction causes attentional but outdated information to intrude into working memory

Area of Science:

• Cognitive Psychology
• Neuroscience
• Attention Research

Background:

• Salient distractors impair attentional filtering into working memory (WM).
• A separate process, secondary selection, handles attended but outdated information in WM.

Purpose of the Study:

• To investigate if dynamic distraction by salient stimuli affects the memory selection of attended but outdated information.
• To explore the interplay between working memory and attentional control under distraction.

Main Methods:

• A combined working memory/visual search task was used.
• Participants maintained a colored square's location while performing a visual search.
• Salient distractors were presented on half the trials, paired with non-target memory items.

Main Results:

• Under salient distractor-absent conditions, memory colors did not cause attentional capture.
• With salient distractors present, the memory target color was incidentally encoded into WM.
• Incidental encoding of outdated information occurred during longer reaction times, indicating distraction's effect.

Conclusions:

• Perceptual distraction can disrupt WM encoding, allowing attended but outdated information to enter WM.
• This finding advances understanding of how working memory and attentional control interact dynamically.
• Dynamic distraction modulates the selection and updating of information within working memory.