Abstract
The experiment investigated the effects of 60-, 70-, 80-, or 90-dB, 250-Hz tones presented at 30-sec intervals during tonic immobility (TI) on the duration of the response. Results indicated that all birds in the 90-dB condition terminated TI with tone onset, 60% of the birds in the 80-dB condition showed the maximal response (1800 sec), and 30% terminated with tone onset. Two parallel responses were hypothesized to result from such stimulation: (l)fear, which increases TI duration and (2) a startle reaction, which terminates TI.
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This paper is based on a Master’s thesis submitted to the Graduate School, Western Washington State College by Daniel C. Hatton.
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Hatton, D.C., Thompson, R.W. Termination of tonic immobility in chickens by auditory stimulation. Bull. Psychon. Soc. 5, 61–62 (1975). https://doi.org/10.3758/BF03336705
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DOI: https://doi.org/10.3758/BF03336705