Effects of spatial frequency bands on perceptual decision:It is not the stimuli but the comparison


Observers performed three between- and two within-category perceptual decisions with hybrid stimuli comprising low and high spatial frequency (SF) images. We manipulated (a) attention to, and (b) congruency of information in the two SF bands. Processing difficulty of the different SF bands varied across different categorization tasks: house–flower, face–house, and valence decisions were easier when based on high SF bands, while flower–face and gender categorizations were easier when based on low SF bands. Larger interference also arose from response relevant distracters that were presented in the “preferred” SF range of the task. Low SF effects were facilitated by short exposure durations. The results demonstrate that decisions are affected by an interaction of task and SF range and that the information from the non-attended SF range interfered at the decision level. A further analysis revealed that overall differences in the statistics of image features, in particular differences of orientation information between two categories, were associated with decision difficulty. We concluded that the advantage of using information from one SF range over another depends on the specific task requirements that built on the differences of the statistical properties between the compared categories.

Publication DOI: https://doi.org/10.1167/10.10.25
Divisions: College of Health & Life Sciences
Additional Information: Creative Commons Attribution Non-Commercial No Derivatives License
Uncontrolled Keywords: face perception,gender,ordinate categorization,subordinate categorization,hybrid stimuli,attention and congruency manipulations
Publication ISSN: 1534-7362
Last Modified: 08 Jan 2024 08:52
Date Deposited: 26 Oct 2018 15:03
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Related URLs: https://jov.arv ... ticleid=2121277 (Publisher URL)
PURE Output Type: Article
Published Date: 2010-08-24
Authors: Rotshtein, Pia
Schofield, Andrew (ORCID Profile 0000-0002-0589-4678)
Funes, Maria
Humphreys, Glyn

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