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. 2020 Mar 17;12:74. doi: 10.3389/fnagi.2020.00074

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Copyright © 2020 Higgen, Heine, Krawinkel, Göschl, Engel, Hummel, Xue and Gerloff.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Summary of threshold estimations for visual and tactile stimulus intensities. Graphs depict the mean stimulus intensity (y-axis) per trial (x-axis) during the course of the adaptive staircase over all participants (younger group = blue; older group = red) with standard deviations (SDs; colored areas). The number of trials equals trials in shortest threshold estimation procedure, i.e., trials common to all participants. (A) Visual threshold estimation in younger participants. (B) Tactile threshold estimation in younger participants. (C) Visual threshold estimation in older participants. (D) Tactile threshold estimation in older participants.