The tonic immobility reaction in chickens: Response characteristics and methodology
@article{Gallup1971TheTI,
title={The tonic immobility reaction in chickens: Response characteristics and methodology},
author={Gordon G. Jr. Gallup and Richard F. Nash and Alan M. Wagner},
journal={Behavior Research Methods \& Instrumentation},
year={1971},
volume={3},
pages={237-239}
}A total of 379 chickens were run in five studies to assess the effect of different procedures on tonic immobility and to measure some of the response components of the reaction. The optimal period of manual restraint, by way of producing the most durable immobility response, was found to be 15 sec, and pretest holding conditions were shown to exert a significant influence on the reaction in naive birds. Birds who defecated during immobility or shortly after termination, remained immobile longer…
68 Citations
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Chicks exhibiting short immobility durations vocalized significantly more than chicks exhibiting longer durations, which supports earlier reports that vocalizations can be inhibited by heightened arousal or fear.
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Group-reared chicks manually restrained in the presence of an unrestrained conspecific remained immobile for less time than birds restrained in isolation. On the other hand, chicks restrained in…
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