scholarly journals Clustering based on multiple features in visual working memory

2019 ◽  
Vol 19 (10) ◽  
pp. 77b
Author(s):  
Gaeun Son ◽  
Sang Chul Chong
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Multiple Features

A Cortical Mechanism for Binding in Visual Working Memory

2001 ◽  
Vol 13 (6) ◽  
pp. 766-785 ◽  
Author(s):  
Antonino Raffone ◽  
Gezinus Wolters
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Phase Segregation ◽  
Verbal Working Memory ◽  
Long Term Memory ◽  
Limited Capacity ◽  
Multiple Features ◽  
Single Pattern ◽  
Individual Features

Luck and Vogel (1997) showed that the storage capacity of visual working memory is about four objects and that this capacity does not depend on the number of features making up the objects. Thus, visual working memory seems to process integrated objects rather than individual features, just as verbal working memory handles higher-order “chunks” instead of individual features or letters. In this article, we present a model based on synchronization and desynchronization of reverberatory neural assemblies, which can parsimoniously account for both the limited capacity of visual working memory, and for the temporary binding of multiple assemblies into a single pattern. A critical capacity of about three to four independent patterns showed up in our simulations, consistent with the results of Luck and Vogel. The same desynchronizing mechanism optimizing phase segregation between assemblies coding for separate features or multifeature objects poses a limit to the number of oscillatory reverberations. We show how retention of multiple features as visual chunks (feature conjunctions or objects) in terms of synchronized reverberatory assemblies may be achieved with and without long-term memory guidance.

scholarly journals The content of visual working memory regulates the priority to access visual awareness, including bound memoranda with multiple features

2019 ◽  
Vol 19 (10) ◽  
pp. 75
Author(s):  
Yun Ding ◽  
Andre Sahakian ◽  
Chris L. E. Paffen ◽  
Marnix Naber ◽  
Stefan Van der Stigchel
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Visual Awareness ◽  
Multiple Features

How retaining objects containing multiple features in visual working memory regulates the priority for access to visual awareness

2021 ◽  
Vol 87 ◽  
pp. 103057
Author(s):  
Yun Ding ◽  
Marnix Naber ◽  
Chris Paffen ◽  
Surya Gayet ◽  
Stefan Van der Stigchel
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Visual Awareness ◽  
Multiple Features

scholarly journals Working memory assessment in schizophrenia and its correlation with executive functions ability

2009 ◽  
Vol 31 (3) ◽  
pp. 219-226 ◽  
Author(s):  
Arthur A. Berberian ◽  
Bruna T. Trevisan ◽  
Tais S. Moriyama ◽  
José M. Montiel ◽  
José Ari C. Oliveira ◽  
...  
Keyword(s):  
Working Memory ◽  
Selective Attention ◽  
Executive Functions ◽  
Visual Working Memory ◽  
Inhibitory Control ◽  
Memory Deficits ◽  
Multiple Features ◽  
Brazilian Sample ◽  
Memory Assessment ◽  
New Strategies

OBJECTIVE: Working memory impairment is common in schizophrenia and is possibly a cause of multiple features of the disorder. However few studies have replicated such findings of impairment patterns in Brazilian samples. The main target of this study was to assess auditory and visual working memory in patients with schizophrenia, to assess if they work as separate systems, and to correlate working memory deficits with executive functions. METHOD: Twenty subjects with schizophrenia and twenty healthy subjects matched by gender, age, and schooling have participated. The abilities assessed were auditory and visual working memory, selective attention, inhibitory control, cognitive flexibility, and planning. RESULTS: Patients showed declines in all measures evaluated, except for a measure reaction time of inhibitory control. Auditory working memory was correlated to selective attention, inhibition, flexibility and planning while Visual working memory to planning and flexibility. CONCLUSION: The present study suggests that working memory and executive functions deficits are present in patients with schizophrenia in the Brazilian sample evaluated. Alterations in executive functions may lead to incapacity of operation of processes of working memory. These findings may contribute to delineate and develop new strategies of schizophrenia treatment in the Brazilian population.

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