Reviews: Theories of Visual Perception, Neuronal Communications. Physiological Society Study Guide Number 4, Visual Search. Proceedings of the First International Conference on Visual Search

Perception ◽  
1991 ◽  
Vol 20 (4) ◽  
pp. 555-558
Author(s):  
R J Watt ◽  
V Walsh ◽  
J J Kulikowski ◽  
J E Calvert
Keyword(s):  
Visual Search ◽  
Visual Perception ◽  
Study Guide ◽  
International Conference

Interference in Visual Perception by Verbal and Spatial Cognitive Activity

2011 ◽  
Vol 14 (2) ◽  
pp. 556-568
Author(s):  
Elisa Pérez-Moreno ◽  
Ángela Conchillo ◽  
Miguel Ángel Recarte
Keyword(s):  
Visual Search ◽  
Visual Perception ◽  
Cognitive Processing ◽  
Search Task ◽  
Visual Search Task ◽  
Verbal Task ◽  
Cognitive Tasks ◽  
Imagery Task ◽  
Mental Load ◽  
Spatial Imagery

In two experiments we tested the hypothesis that cognitive processing based on spatial imagery produces more deterioration of visual perception than cognitive processing based on verbal codes. So, we studied the effect on visual perception of two cognitive tasks, one of spatial imagery and the other a verbal task. In the first one, with 30 participants, we analyzed the mental load and ocular behaviors in both cognitive tasks. In the second experiment, with 29 participants, we studied the effect of both tasks on a visual search task, using a dual-task experimental paradigm. The verbal task presented higher mental load than the imagery task when both tasks were carried out with visual search task, and there was more deterioration in stimulus detection with the verbal task. We can conclude that: (1) cognitive tasks produce important deterioration in the capacities of visual search and identification of stimuli; (2) this deterioration has two components: (a) an inefficient search, associated with alterations of the gaze patterns while performing cognitive tasks, and (b) a general interference, nonspecific to spatial codes, in the process of identification of looked-at stimuli; (3) this cognitive interference is related to the mental load or effort required by the cognitive task.

scholarly journals Visual memory and visual perception: when memory improves visual search

2011 ◽  
Vol 39 (6) ◽  
pp. 1094-1102 ◽  
Author(s):  
Benoit Riou ◽  
Mathieu Lesourd ◽  
Lionel Brunel ◽  
Rémy Versace
Keyword(s):  
Visual Search ◽  
Visual Perception ◽  
Visual Memory

scholarly journals Metacognitive asymmetries in visual perception

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Matan Mazor ◽  
Rani Moran ◽  
Stephen M Fleming
Keyword(s):  
Visual Search ◽  
Visual Perception ◽  
Default Reasoning ◽  
Visual Features ◽  
Default State ◽  
Presence And Absence ◽  
Object Feature ◽  
Different Levels

Abstract People have better metacognitive sensitivity for decisions about the presence compared to the absence of objects. However, it is not only objects themselves that can be present or absent, but also parts of objects and other visual features. Asymmetries in visual search indicate that a disadvantage for representing absence may operate at these levels as well. Furthermore, a processing advantage for surprising signals suggests that a presence/absence asymmetry may be explained by absence being passively represented as a default state, and presence as a default-violating surprise. It is unknown whether the metacognitive asymmetry for judgments about presence and absence extends to these different levels of representation (object, feature, and default violation). To address this question and test for a link between the representation of absence and default reasoning more generally, here we measure metacognitive sensitivity for discrimination judgments between stimuli that are identical except for the presence or absence of a distinguishing feature, and for stimuli that differ in their compliance with an expected default state.

scholarly journals Stage 1 Registered Report: Metacognitive asymmetries in visual perception

2021 ◽  
Author(s):  
Matan Mazor ◽  
Rani Moran ◽  
Stephen M Fleming
Keyword(s):  
Visual Search ◽  
Visual Perception ◽  
Default Reasoning ◽  
Visual Features ◽  
Default State ◽  
Presence And Absence ◽  
Object Feature ◽  
Stage 1 ◽  
Different Levels

People have better metacognitive sensitivity for decisions about the presence compared to the absence of objects. However, it is not only objects themselves that can be present or absent, but also parts of objects and other visual features. Asymmetries in visual search indicate that a disadvantage for representing absence may operate at these levels as well. Furthermore, a processing advantage for surprising signals suggests that a presence/absence asymmetry may be explained by absence being passively represented as a default state, and presence as a default-violating surprise. It is unknown whether metacognitive asymmetry for judgements about presence and absence extend to these different levels of representation (object, feature, and default-violation). To address this question and test for a link between the representation of absence and default reasoning more generally, here we measure metacognitive sensitivity for discrimination judgments between stimuli that are identical except for the presence or absence of a distinguishing feature, and for stimuli that differ in their compliance with an expected default state.

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