title: A computational modeling approach on three-digit number processing.
abstract: Recent findings indicate that the constituting digits of multi-digit numbers are processed, decomposed into units, tens, and so on, rather than integrated into one entity. This is suggested by interfering effects of unit digit processing on two-digit number comparison. In the present study, we extended the computational model for two-digit number magnitude comparison of Moeller, Huber, Nuerk, and Willmes (2011a) to the case of three-digit number comparison (e.g., 371_826). In a second step, we evaluated how hundred-decade and hundred-unit compatibility effects were moderated by varying the percentage of within-hundred (e.g., 539_582) and within-hundred-and-decade filler items (e.g., 483_489). From the results we predict that numerical distance as well as compatibility effects should indeed be modulated by the relevance of tens and units in three-digit number magnitude comparison: While in particular the hundred distance effect should decrease, we predict hundred-decade and hundred-unit compatibility effects to increase with the relevance of tens and units.
authors: Knowledge Media Research Center, Tuebingen. s.huber@iwm-kmrc.de
authors: Stefan
authors: S
authors: Huber
authors: Korbinian
authors: K
authors: Moeller
authors: Hans-Christoph
authors: HC
authors: Nuerk
authors: Klaus
authors: K
authors: Willmes
mesh_terms: D003198:Computer Simulation; D003210:Concept Formation; D006801:Humans; D055641:Mathematical Concepts; D008962:Models, Theoretical; D011340:Problem Solving; D011930:Reaction Time; D012106:Research