| Generating nonsymbolic number stimuli. | |
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MedLine Citation:
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PMID: 21512872 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Studies investigating nonsymbolic numbers (e.g., dot arrays) are confronted with the problem that changes in numerosity are always accompanied by changes in the visual properties of the stimulus. It is therefore debated whether the visual properties of the stimulus rather than number can explain the results obtained in studies investigating nonsymbolic number processing. In this report, we present a program (available at http://titiagebuis.eu/Materials.html ; note that the program is designed to work with the Psychophysics Toolbox in MATLAB) that exports information about the visual properties of stimuli that co-vary with number (area extended, item size, total surface, density, and circumference). Consequently, insight into the relation between the visual properties of the stimulus and numerical distance can be achieved, and post hoc analyses can be conducted to directly reveal whether numerical distance or (some combinations of) the visual properties of a stimulus could be the most likely candidate underlying the results. Here, we report data that demonstrate the program's usefulness for research on nonsymbolic number stimuli. |
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Authors:
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Titia Gebuis; Bert Reynvoet |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-4-22 |
Journal Detail:
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Title: Behavior research methods Volume: - ISSN: 1554-3528 ISO Abbreviation: - Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-4-22 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101244316 Medline TA: Behav Res Methods Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Laboratory of Experimental Psychology, Katholieke Universiteit Leuven, Tiensestraat 102, 3000, Leuven, Belgium, Titia.Gebuis@psy.kuleuven.be. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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