@article{ref1,
title="Both vision-for-perception and vision-for-action follow Weber's law at small object sizes, but violate it at larger sizes",
journal="Neuropsychologia",
year="2016",
author="Bruno, Nicola and Uccelli, Stefano and Viviani, Eva and de'Sperati, Claudio",
volume="91",
number="",
pages="327-334",
abstract="According to a previous report, the visual coding of size does not obey Weber's law when aimed at guiding a grasp (Ganel et al., 2008a). This result has been interpreted as evidence for a fundamental difference between sensory processing in vision-for-perception, which needs to compress a wide range of physical objects to a restricted range of percepts, and vision-for-action when applied to the much narrower range of graspable and reachable objects. We compared finger aperture in a motor task (precision grip) and perceptual task (cross modal matching or &quot;manual estimation&quot; of the object's size). Crucially, we tested the whole range of graspable objects. We report that both grips and estimations clearly violate Weber's law with medium-to-large objects, but are essentially consistent with Weber's law with smaller objects. These results differ from previous characterizations of perception-action dissociations in the precision of representations of object size. Implications for current functional interpretations of the dorsal and ventral processing streams in the human visual system are discussed.<br><br>Copyright © 2016 Elsevier Ltd. All rights reserved.<p /> <p>Language: en</p>",
language="en",
issn="0028-3932",
doi="10.1016/j.neuropsychologia.2016.08.022",
url="http://dx.doi.org/10.1016/j.neuropsychologia.2016.08.022"
}