Effect of local fluency gradient of objects creates search asymmetry

Search asymmetry is a phenomenon in which search efficiency in a visual-search task differs for searching for an X target among Y distractors from search for a Y target among X distractors. Previous research shows that search asymmetry is mainly produced by a difference in the whole signal strength...

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Bibliographic Details
Published in:Attention, perception & psychophysics perception & psychophysics, 2019-01, Vol.81 (1), p.71-84
Main Authors: Yamashita, J., Kumada, T.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Asymmetry
Attention
Attention - physiology
Behavioral Science and Psychology
Cognition - physiology
Cognitive Psychology
Efficiency
Experimental psychology
Eye Movements
Eye Movements - physiology
Familiarity
Female
Humans
Male
Pattern Recognition, Visual - physiology
Photic Stimulation - methods
Psychology
Reaction Time
Reaction Time - physiology
Recognition (Psychology) - physiology
Stimuli
Visual Perception - physiology
Young Adult
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Description
Summary:Search asymmetry is a phenomenon in which search efficiency in a visual-search task differs for searching for an X target among Y distractors from search for a Y target among X distractors. Previous research shows that search asymmetry is mainly produced by a difference in the whole signal strength of items or a difference in item familiarity. This study reports that a difference in the local fluency within items also affects search efficiency and generates search asymmetry. Fluency is a value that correlates with the processing efficiency of an item. In particular, five experiments reveal that search efficiency for two part items depends on whether a fluent part is the top or bottom portion of a target (vs. distractor). We argue that this type of search asymmetry implicates the operation of an unknown mechanism that detects local fluency gradient in visual processing.
ISSN:1943-3921
1943-393X
DOI:10.3758/s13414-018-1576-x