| Abstract: | Symbolic and nonsymbolic numerosities produce similar behavioural effects and activate the same brain areas. These results have usually been interpreted in terms of a common, notation-independent magnitude representation. However, semantic priming between symbolic and nonsymbolic inputs has been somehow elusive (e.g., Koechlin, Naccache, Block, & Dehaene, 1999 Koechlin, E., Naccache, L., Block, E. and Dehaene, S. 1999. Primed numbers: Exploring the modularity of numerical representations with masked and unmasked semantic priming. Journal of Experimental Psychology: Human Perception and Performance, 25: 1882–1905. Crossref], Web of Science ®] , Google Scholar]). In Experiment 1, we looked at whether cross-notational semantic priming depends on exact numerical meaning. Dice faces and digits were mixed as prime and target. Semantic priming occurred when prime and target were in the same notation as much as when they were in different notation. In Experiment 2, we found cross-notation semantic priming even when the nonsymbolic numerosity was presented as a set of random dots. Priming, however, occurred only from sets of dots to digit, not vice versa. These data support the computational model recently proposed by Verguts and Fias (2004 Verguts, T. and Fias, W. 2004. Representation of number in animals and humans: A neural model. Journal of Cognitive Neuroscience, 16: 1493–1504. Crossref], PubMed], Web of Science ®] , Google Scholar]; Verguts, Fias, & Stevens, 2005 Verguts, T., Fias, W. and Stevens, M. 2005. A model of exact small-number representation. Psychonomic Bulletin & Review, 112: 66–80. Google Scholar]). |
