Volume 53, Issue 2, Pages 307-314 (January 2007) Notation-Dependent and -Independent Representations of Numbers in the Parietal Lobes  Roi Cohen Kadosh, Kathrin Cohen Kadosh, Amanda Kaas, Avishai Henik, Rainer Goebel  Neuron  Volume 53, Issue 2, Pages 307-314 (January 2007) DOI: 10.1016/j.neuron.2006.12.025 Copyright © 2007 Elsevier Inc. Terms and Conditions

Figure 1 Paradigm Design Six different conditions containing three different notations (pure digits, pure-number words, and mixed notations) appeared in the same quantity or different quantities in a single event. Each number was presented for 350 ms, with a time lapse of 1300 ms between the first and the second number. After 8 s or 4 s, a new trial began. Participants were encouraged to pay close attention to the stimuli in order to be able to answer several questions that were to follow the measurements. The font type and size of the second stimulus was never identical to the previous one, in order to exclude any low-level perceptual effect. An event was modeled by including the first and second stimulus in a pair as an event in the hemodynamic response function. Hence, a larger percent signal change for trials with different quantities than for trials with the same quantity would suggest an adaptation effect of quantity (see Kourtzi and Kanwisher, 2000, for a similar design for object processing). Neuron 2007 53, 307-314DOI: (10.1016/j.neuron.2006.12.025) Copyright © 2007 Elsevier Inc. Terms and Conditions

Figure 2 A Glass Brain with Each Participant's Cluster in the Left and Right Parietal Lobe Different colors depict clusters of different participants. Left column, lateral view; middle column, posterior view; right column, superior view. Neuron 2007 53, 307-314DOI: (10.1016/j.neuron.2006.12.025) Copyright © 2007 Elsevier Inc. Terms and Conditions

Figure 3 Quantity Adaptation in the Parietal Lobes Percent signal change (in comparison to nonevent scans) for the left (A) and right (B) parietal lobes as a function of notation and quantity (averaged across participants' ROIs). Trials start at time = 0 s and reach the peak around 6 s after stimuli presentation. The adaptation effect can be observed by a reduction in the percent signal change for the red curve, which indicates the presentation of similar quantity in the first and second stimulus in a given trial, compared to the green curve, which indicates the presentation of different quantities in the first and second stimulus in a given trial. Error bars depict one standard error of mean (SEM). Neuron 2007 53, 307-314DOI: (10.1016/j.neuron.2006.12.025) Copyright © 2007 Elsevier Inc. Terms and Conditions