Subjective thirst moderates changes in speed of responding associated with water consumption

Article


Edmonds, C., Crombie, Rosanna and Gardner, Mark R. 2013. Subjective thirst moderates changes in speed of responding associated with water consumption. Frontiers in Human Neuroscience. 7, p. Art363.
AuthorsEdmonds, C., Crombie, Rosanna and Gardner, Mark R.
Abstract

Participants (N=34) undertook a CANTAB battery on two separate occasions after fasting and abstaining from fluid intake since the previous evening. On one occasion they were offered 500ml water shortly before testing, and on the other occasion no water was consumed prior to testing. Reaction times, as measured by Simple Reaction Time (SRT), were faster on the occasion on which they consumed water. Furthermore, subjective thirst was found to moderate the effect of water consumption on speed of responding. Response latencies in the SRT task were greater under the “no water” condition than under the “water” condition, but only for those participants with relatively high subjective thirst after abstaining from fluid intake overnight. For those participants with relatively low subjective thirst, latencies were unaffected by water consumption, and were similarly fast as those recorded for thirsty participants who had consumed water. These results reveal the novel finding that subjective thirst moderates the positive effect of fluid consumption on speed of responding. The results also showed evidence that practice also affected task performance. These results imply that, for speed of responding at least, the positive effects of water supplementation may result from an attenuation of the central processing resources consumed by the subjective sensation of thirst that otherwise impair the execution of speeded cognitive processes.

JournalFrontiers in Human Neuroscience
Journal citation7, p. Art363
ISSN1662-5161
Year2013
Publisher's version
License
CC BY
Web address (URL)http://dx.doi.org/10.3389/fnhum.2013.00363
Publication dates
PrintJul 2013
Publication process dates
Deposited11 Dec 2013
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