scholarly journals Selective Influence and Sequential Operations: A Research Strategy for Visual Search

2019 ◽  
Author(s):  
Kaleb A. Lowe ◽  
Thomas R. Reppert ◽  
Jeffrey D Schall
Keyword(s):  
Visual Search ◽  
Cognitive Processes ◽  
Experimental Approach ◽  
Research Strategy ◽  
Response Mapping ◽  
Stimulus Response ◽  
Singleton Distractor ◽  
Visual Encoding ◽  
Processing Architectures ◽  
Selective Influence

ABSTRACTWe introduce conceptually and empirically a powerful but underutilized experimental approach to dissect the cognitive processes supporting performance of a visual search task with factorial manipulations of singleton-distractor identifiability and stimulus-response cue discriminability. We show that systems factorial technology can distinguish processing architectures from the performance of macaque monkeys. This demonstration offers new opportunities to distinguish neural mechanisms through selective manipulation of visual encoding, search selection, rule encoding, and stimulus-response mapping.

scholarly journals Selective influence and sequential operations: A research strategy for visual search

2019 ◽  
Vol 27 (5-8) ◽  
pp. 387-415
Author(s):  
Kaleb A. Lowe ◽  
Thomas R. Reppert ◽  
Jeffrey D. Schall
Keyword(s):  
Visual Search ◽  
Research Strategy ◽  
Selective Influence

Cognitive processes in visual search

1976 ◽  
Author(s):  
John R. Bloomfield ◽  
John A. Modrick
Keyword(s):  
Visual Search ◽  
Cognitive Processes

Sensorimotor Locus of the Buildup Activity in Monkey Lateral Intraparietal Area Neurons

2010 ◽  
Vol 103 (5) ◽  
pp. 2664-2674 ◽  
Author(s):  
Joonkoo Park ◽  
Jun Zhang
Keyword(s):  
Neural Activity ◽  
Time Course ◽  
Temporal Dynamics ◽  
Neuronal Firing ◽  
Firing Activity ◽  
Motor Representation ◽  
Lateral Intraparietal Area ◽  
Response Mapping ◽  
Stimulus Response ◽  
Dot Motion

A study in 2002 using a random-dot motion-discrimination paradigm showed that an information accumulation model with a threshold-crossing mechanism can account for activity of the lateral intraparietal area (LIP) neurons. Here, mathematical techniques were applied to the same dataset to quantitatively address the sensory versus motor representation of the neuronal activity during the time course of a trial. A technique based on Signal Detection Theory was applied to provide indices to quantify how neuronal firing activity is responsible for encoding the stimulus or selecting the response at the behavioral level. Additionally, a statistical model based on Poisson regression was used to provide an orthogonal decomposition of the neural activity into stimulus, response, and stimulus-response mapping components. The temporal dynamics of the sensorimotor locus of the LIP activity indicated that there is no stimulus-response mapping-specific neuronal firing activity throughout a trial; the neural activity toward the saccadic onset reflects the development of the motor representation, and the neural activity in the beginning of a trial contains little, if any, information about the sensory representation. Sensorimotor analysis on individual neurons also showed that the neuronal activation, as a population, represent pending saccadic direction and carry little information about the direction of the motion stimulus.

Automated Stimulus-Response Mapping of High-Electrode-Count Neural Implants

2009 ◽  
Vol 17 (5) ◽  
pp. 504-511 ◽  
Author(s):  
A.M. Wilder ◽  
S.D. Hiatt ◽  
B.R. Dowden ◽  
N.A.T. Brown ◽  
R.A. Normann ◽  
...  
Keyword(s):  
Neural Implants ◽  
Response Mapping ◽  
Stimulus Response

scholarly journals Shifting Attention Between Visual Dimensions as a Source of Switch Costs

2017 ◽  
Vol 28 (4) ◽  
pp. 470-481 ◽  
Author(s):  
Heike Elchlepp ◽  
Maisy Best ◽  
Aureliu Lavric ◽  
Stephen Monsell
Keyword(s):  
Switch Cost ◽  
Task Switch ◽  
Relevant Stimulus ◽  
Color Classification ◽  
Perceptual Dimension ◽  
Response Mapping ◽  
Stimulus Response ◽  
Switch Costs ◽  
Residual Switch Cost ◽  
Letter Task

Task-switching experiments have documented a puzzling phenomenon: Advance warning of the switch reduces but does not eliminate the switch cost. Theoretical accounts have posited that the residual switch cost arises when one selects the relevant stimulus–response mapping, leaving earlier perceptual processes unaffected. We put this assumption to the test by seeking electrophysiological markers of encoding a perceptual dimension. Participants categorized a colored letter as a vowel or consonant or its color as “warm” or “cold.” Orthogonally to the color manipulation, some colors were eight times more frequent than others, and the letters were in upper- or lowercase. Color frequency modulated the electroencephalogram amplitude at around 150 ms when participants repeated the color-classification task. When participants switched from the letter task to the color task, this effect was significantly delayed. Thus, even when prepared for, a task switch delays or prolongs encoding of the relevant perceptual dimension.

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