scholarly journals Temporal integration and attentional selection of color and contrast target pairs in rapid serial visual presentation

2019 ◽  
Vol 196 ◽  
pp. 56-69 ◽  
Author(s):  
Aytaç Karabay ◽  
Elkan G. Akyürek
Keyword(s):  
Rapid Serial Visual Presentation ◽  
Temporal Integration ◽  
Visual Presentation ◽  
Attentional Selection ◽  
Selection Of

scholarly journals Temporal integration and attentional selection of color and contrast target pairs in rapid serial visual presentation

2019 ◽  
Author(s):  
Aytaç Karabay ◽  
Elkan G. Akyurek
Keyword(s):  
Rapid Serial Visual Presentation ◽  
Temporal Integration ◽  
Visual Presentation ◽  
Identification Accuracy ◽  
Color Condition ◽  
Temporal Attention ◽  
Contrast Condition ◽  
Different Color ◽  
Dual Target ◽  
Selection Of

Performance in a dual target rapid serial visual presentation task was investigated, dependent on whether the color or the contrast of the targets was the same or different. Both identification accuracy on the second target, as a measure of temporal attention, and the frequency of temporal integration were measured. When targets had a different color (red or blue), overall identification accuracy of the second target and identification accuracy of the second target at Lag 1 were both higher than when targets had the same color. At the same time, increased temporal integration of the targets at Lag 1 was observed in the different color condition, even though actual (non-integrated) single targets never consisted of multiple colors. When the color pairs were made more similar, so that they all fell within the range of a single nominal hue (blue), these effects were not observed. Different findings were obtained when contrast was manipulated. Identification accuracy of the second target was higher in the same contrast condition than in the different contrast condition. Higher identification accuracy of both targets was furthermore observed when they were presented with high contrast, while target contrast did not influence temporal integration at all. Temporal attention and integration were thus influenced differently by target contrast pairing than by (categorical) color pairing. Categorically different color pairs, or more generally, categorical feature pairs, may thus afford a reduction in temporal competition between successive targets that eventually enhances attention and integration.

scholarly journals 'Pseudoextinction': Asymmetries in simultaneous attentional selection

2016 ◽  
Author(s):  
Patrick T. Goodbourn ◽  
Alex O. Holcombe ◽  
Charlie Ludowici
Keyword(s):  
Visual Field ◽  
Rapid Serial Visual Presentation ◽  
Visual Presentation ◽  
Mixture Modeling ◽  
Attentional Selection ◽  
Right Visual Field ◽  
Temporal Precision ◽  
The Right

We report robust visual field asymmetries associated with selectingsimultaneous targets. One letter embedded in a rapid serial visual presentation(RSVP) of letters was encircled by a white ring, cueing it as the target to report. In some conditions, 2 RSVP streams were presented concurrently, and targets appearedsimultaneously in both. When only 1 stream was cued, performance was similarregardless of whether it was in the left or right visual field. Cueing 2 streams barelyaffected performance in the left stream, but performance in the right stream sufferedmarkedly. We term this phenomenon pseudoextinction, by analogy to pseudoneglectwhereby observers bisect lines to the left of center. Such attentional asymmetries areoften believed to originate from a processing imbalance between the 2 cerebralhemispheres. But pseudoextinction also occurred with vertically arrayed streams, withhigher efficacy in the superior than in the inferior stream. Mixture modeling of errorsindicated that pseudoextinction did not affect the temporal precision or latency ofselection episodes; rather, only the efficacy of selection suffered. These findings leadus to suggest that pseudoextinction arises because perceptual traces are activatedsimultaneously in a visual buffer but must be tokenized serially. Observers succeed inselecting simultaneous targets because trace activation occurs in parallel. However,observers often fail to report both targets because tokenization proceeds serially:While 1 target is being tokenized, the other’s trace may decay below the activationlevel necessary for tokenization.

Conceptual short-term memory (CSTM) supports core claims of Christiansen and Chater

2016 ◽  
Vol 39 ◽  
Author(s):  
Mary C. Potter
Keyword(s):  
Working Memory ◽  
Rapid Serial Visual Presentation ◽  
Language Comprehension ◽  
Short Term Memory ◽  
Visual Presentation ◽  
Long Term Memory ◽  
Short Term ◽  
Term Memory ◽  
Use Of Knowledge

AbstractRapid serial visual presentation (RSVP) of words or pictured scenes provides evidence for a large-capacity conceptual short-term memory (CSTM) that momentarily provides rich associated material from long-term memory, permitting rapid chunking (Potter 1993; 2009; 2012). In perception of scenes as well as language comprehension, we make use of knowledge that briefly exceeds the supposed limits of working memory.

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