| Using addition to solve large subtractions in the number domain up to 20. | |
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MedLine Citation:
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PMID: 19963199 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study examined 25 university students' use of addition to solve large single-digit subtractions by contrasting performance in the standard subtraction format (12-9=.) and in the addition format (9+.=12). In particular, we investigated the effect of the relative size of the subtrahend on performance in both formats. We found a significant interaction between format, the magnitude of the subtrahend (S) compared to the difference (D) (S>D vs. S<D), and the numerical distance between subtrahend and difference. When the subtrahend was larger than the difference and S and D were far from each other (e.g., 12-9=.), problems were solved faster in the addition than in the subtraction format; when the subtrahend was smaller than the difference and S and D were far from each other (e.g., 12-3=.), problems were solved faster in the subtraction than in the addition format. However, when the subtrahend and the difference were close to each other (e.g., 13-7=.), there were no significant reaction time differences between both formats. These results suggest that adults do not rely exclusively and routinely on addition to solve large single-digit subtractions, but select either addition-based or subtraction-based strategies depending on the relative size of the subtrahend. |
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Authors:
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Greet Peters; Bert De Smedt; Joke Torbeyns; Pol Ghesqui?re; Lieven Verschaffel |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-12-05 |
Journal Detail:
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Title: Acta psychologica Volume: 133 ISSN: 1873-6297 ISO Abbreviation: Acta Psychol (Amst) Publication Date: 2010 Feb |
Date Detail:
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Created Date: 2010-01-27 Completed Date: 2010-04-08 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370366 Medline TA: Acta Psychol (Amst) Country: Netherlands |
Other Details:
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Languages: eng Pagination: 163-9 Citation Subset: IM |
Copyright Information:
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Copyright 2009 Elsevier B.V. All rights reserved. |
Affiliation:
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Centre for Instructional Psychology and Technology, Katholieke Universiteit Leuven, Belgium. Greet.Peters@ped.kuleuven.be |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Cognition* Female Humans Male Mathematics* Middle Aged Problem Solving Reaction Time Task Performance and Analysis Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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