Goal-directed attention transforms both working and long-term memory representations in the human parietal cortex.

Area of Science:

• Cognitive Neuroscience
• Neuroimaging

Background:

• Distractors pose a challenge to cognitive processing capacity.
• The neural mechanisms of selective attention in reducing interference and supporting memory are not fully understood.

Purpose of the Study:

• To investigate how selective attention modulates neural representations to reduce interference and enhance memory.
• To compare the effects of perceptual attention and reflective attention on memory performance and neural representations.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to collect neural data during a selective attention task.
• Participants performed a memory recognition task the following day.
• Multiple-voxel pattern analysis (MVPA) was applied to fMRI data to analyze neural representations.

Main Results:

• Perceptual attention improved target memory and reduced distractor memory compared to reflective attention.
• Perceptual attention led to more robust target representations and weaker distractor representations in working memory.
• Neural representations shifted from visual to parietal cortex under perceptual attention, with reduced pattern similarity between simultaneously presented items.

Conclusions:

• Selective attention plays a critical role in transforming memory representations to minimize interference.
• Perceptual attention is more effective than reflective attention in leveraging neural mechanisms for improved long-term memory performance.