par Guillaume, Mathieu 
;Nys, Julie ;Content, Alain
Référence Journal of cognitive psychology, 24, 7, page (836-843)
Publication Publié, 2012
;Nys, Julie ;Content, Alain Référence Journal of cognitive psychology, 24, 7, page (836-843)
Publication Publié, 2012
Article révisé par les pairs
| Résumé : | A recent study revealed that adults frequently start to add two two-digit numbers from the larger one, suggesting that addend magnitudes are compared at an early stage of processing. However, several studies showed that symbolic number comparison involves compatibility effects: Such numerical comparison is easier when the larger number also contains the larger unit (48-25) than in the opposite, incompatible case (45-28). In this context, whether the compatibility between tens and units across operands affects the execution of arithmetic-solving strategies remains an open question. In this study, we used two kinds of verbal protocols to assess how addend compatibility influences the implementation of magnitude-based strategies. We observed that participants started their computations from the larger operand more frequently when solving compatible additions than they did when solving incompatible ones. The presence of a compatibility effect extends the view that multidigit number processing is componential rather than holistic, even in an arithmetic task that did not explicitly require a number magnitude comparison. Further, the findings corroborate the notion that number magnitude is used in mental calculation and influences the way calculation strategies are implemented. © 2012 Psychology Press. |
