AUTHOR=Finke Sabrina , Kemény Ferenc , Clayton Francina J. , Banfi Chiara , Steiner Anna F. , Perchtold-Stefan Corinna M. , Papousek Ilona , Göbel Silke M. , Landerl Karin TITLE=Cross-Format Integration of Auditory Number Words and Visual-Arabic Digits: An ERP Study JOURNAL=Frontiers in Psychology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2021.765709 DOI=10.3389/fpsyg.2021.765709 ISSN=1664-1078 ABSTRACT=

Converting visual-Arabic digits to auditory number words and vice versa is seemingly effortless for adults. However, it is still unclear whether this process takes place automatically and whether accessing the underlying magnitude representation is necessary during this process. In two event-related potential (ERP) experiments, adults were presented with identical (e.g., “one” and 1) or non-identical (e.g., “one” and 9) number pairs, either unimodally (two visual-Arabic digits) or cross-format (an auditory number word and a visual-Arabic digit). In Experiment 1 (N=17), active task demands required numerical judgments, whereas this was not the case in Experiment 2 (N=19). We found pronounced early ERP markers of numerical identity unimodally in both experiments. In the cross-format conditions, however, we only observed late neural correlates of identity and only if the task required semantic number processing (Experiment 1). These findings suggest that unimodal pairs of digits are automatically integrated, whereas cross-format integration of numerical information occurs more slowly and involves semantic access.