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Which code does underlie multiplication? Evidences from a magnitude decision task with masked priming - ¿Qué código subyace a las Multiplicaciones? Evidencias de

Author(s): Jesús Damas López

Journal: Escritos de Psicología - Psychological Writings
ISSN 1138-2635

Volume: 2;
Issue: 3;
Start page: 27;
Date: 2009;
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Keywords: Masked priming | Single-digit multiplications | Magnitude decision task

Recent studies have shown that the prior masked presentation of a multiplication facilitates the naming of its solution. The different models of arithmetical processing that coexist today offer various explanations for this phenomenon, and it is not clear what is the locus (semantic or verbal) of this facilitation effect. In the present study we try to determinethe nature of the effect by keeping the same exposition sequence, but changing the naming verbal task to a magnitude decision task ("is the number displayed more or less than 18?"). We presented a series of target numbers preceded by a masked multiplication matching or non-matching the target number on which the magnitude judgementshould be done. The time to judge the magnitude of the matching targets was similar to that taken to judge the non-matching ones. Thus, the presentation of a masked multiplication does not appear to activate its solution at the semantic level, suggesting that the locus of the priming effects found in naming tasks has its origin in the verbal representations of the multiplication.
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