@article{ref1,
title="Is "left" always where the thumb is right?: stimulus-response compatibilities as a function of posture and location of the responding hand",
journal="Cognitive and behavioral neurology",
year="2005",
author="Leuthard, Jurg and Bächtold, Daniel and Brugger, P.",
volume="18",
number="3",
pages="173-178",
abstract="OBJECTIVE: To determine hand-centered coordinate systems for left-right discriminations in representational space, including scenes imagined behind one's head (&quot;backspace&quot;). METHOD: Thirty-two healthy men responded with the index or ring finger of their right (dominant) hand to numbers presented in the center of a screen. These indicated hours on the right or left half of a clock face. A decision &quot;earlier or later than six o'clock?&quot; was required. There were 4 response conditions: (1) pronated and (2) supinated hand in frontspace and (3) pronated and (4) supinated hand in backspace. RESULTS: &quot;Left&quot; and &quot;right&quot; were reliably and differentially associated with the 2 different fingers for all conditions except the pronated hand in backspace (conflict between body-centered and hand-centered reference frames). When backspace trials were analyzed as a function of individual strategies of the localization of the imaginary clockface (ie, around the stimulus number in frontspace versus around the response hand in backspace), it was found that the 2 strategies were associated with opposite right/left assignments. CONCLUSIONS: Together, these results indicate relatively universal left/right assignments to the fingers of a hand held in canonical postures and interindividually variable (but intraindividually consistent) assignments for less canonical postures. The task appears suitable for the quantification of representational neglect, especially in backspace.<p /> <p>Language: en</p>",
language="en",
issn="1543-3633",
doi="",
url="http://dx.doi.org/"
}