Abstract:
:Event-related potentials were recorded with 61 electrodes from 16 students who verified either the correctness of single-digit multiplication problems or the semantic congruency of sentences. Multiplication problems varied in size and sentence fragments in constraint. Both semantic and arithmetic incongruencies evoked a typical N400 with a clear parieto-central maximum. In addition, numerically larger problems (8x7), in comparison to smaller problems (3x2), evoked a negativity starting at about 360 ms whose maximum was located over the right temporal-parietal scalp. These results indicate that the arithmetic incongruency and the problem-size effect are functionally distinct. It is suggested that the arithmetic and the semantic incongruency effects are both functionally related to a context-dependent spread of activation in specialized associative networks, whereas the arithmetic problem-size effect is due to rechecking routines that go beyond basic fact retrieval.
journal_name
Psychophysiologyjournal_title
Psychophysiologyauthors
Jost K,Hennighausen E,Rösler Fdoi
10.1111/1469-8986.00119subject
Has Abstractpub_date
2004-01-01 00:00:00pages
46-59issue
1eissn
0048-5772issn
1540-5958pii
PSYP119journal_volume
41pub_type
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