@article{ref1,
title="Exploring attention-based explanations for some violations of Hick's law for aimed movements",
journal="Attention, perception and psychophysics",
year="2011",
author="Wright, Charles E. and Marino, Valerie F. and Chubb, Charles and Rose, Kelsey A.",
volume="73",
number="3",
pages="854-871",
abstract="Choice reaction time generally increases linearly with the logarithm of the number of potential stimulus-response alternatives, a regularity known as Hick's law. Two apparent violations of this generalization, which have been reported for aimed eye movements (Kveraga, Boucher, & Hughes, Experimental Brain Research, 146, 307-314, 2002), and arm movements (Wright, Marino, Belovsky, & Chubb, Experimental Brain Research, 179, 475-496, 2007), occurred when the indicator stimulus was an abrupt change at the location that was the target of the to-be-made movement. We report two experiments that examined and rejected the hypothesis that these abrupt-onset indicator stimuli triggered a shift in exogenous attention and that this led to unusually small uncertainty effects. Each experiment compared this indicator stimulus with a single alternative: Experiment 1 tested an indicator stimulus at all locations other than the target; Experiment 2 tested a central pointer to the target. Neither alternative led to an uncertainty effect for pointing responses that was of the size typically observed for other responses using the same stimuli.<p /> <p>Language: en</p>",
language="en",
issn="1943-3921",
doi="10.3758/s13414-010-0062-x",
url="http://dx.doi.org/10.3758/s13414-010-0062-x"
}