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VISUAL WORKING MEMORY - Coggle Diagram
VISUAL WORKING MEMORY
VWM CAPACITY: FROM PSYCHOPHYSICS AND NEUROBIOLOGY TO INDIVIDUAL DIFFERENCES
Why study?
Change Blindness
Change detection paradigm
Good pstychometric properties
Correlations
Broad cognitive function
Long-term memory
Neural activity
Controlateral delay activity
Plateu in IPS activity
What is?
Visual nature information
Active maintenance of information
Working on information
Role for vision
Eye movements
Brigde gaps
Connect pre-saccade and post-saccade representation
Bias in relation to current contents
Higher-level visual tasks
Searched template and long-term storing
Not only store information
Activation also if the object is present
Nature of VWM capacity limitation
Slot-based theories
Relation between precision and set size
Statistical distribution
Normal distribution (in-memory trials)
Uniform distribution (out-of-memory trials)
Consider probability to be in memory
Results
Precision improve <3item
Precision doesn't worse >3item
Why not Resource-base model?
Declined probability for invalid trials
Reducing precision, non increasing K(max)
Increasing delay activiy, increasing set size
Resource-base theories
Reducing precision as guessing strategy
New model with variable-precision resource
Individual and group differences
Impaired filtering
Reduced set size (Parkinson)
Hyperfocus on small number of item (Schizophrenia)
Neural mechanisms
Recurrent feedback loop
Synchrony of cell assembles
VISUAL WORKING MEMORY & INTERNAL ATTENTION
Experimental paradigm
Retro-cueing paradigm
Internal Attention helps WM
Reaction time and Accurancy
Quality of representation
Under control access to WM
Neural Control
fMRI
Overlapping
(Sensorimotor) parietal-frontal circuits
Additional brain areas depending on contex
Differences
Pre-cues
Parietal, temporal, occipital corteces
Retro-cue
Frontal corteces
ERPs
Nature of WM representations
Putative mechanisms
Spatial shortcut of WM representations
Inhibition of distracting informations
Adaptive mechanisms for attended locations