Aversiveness of the induction of tonic immobility in chickens (Gallus gallus).

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Abstract
Notes that, because of its sensitivity to various manipulations associated with either increases or decreases in aversive stimulation, tonic immobility seems to qualify as a fear reaction. The present experiments provided an independent assessment of the aversive properties of immobility induction. In Exp I, using 32 Production Red day-old chickens, a cue previously paired with onset of immobility suppressed activity in a stabilimeter. Similarly, in Exp II, with 24 Production Red day-old chickens, response-contingent immobilization produced punishmentlike effects in an instrumental conditioning paradigm. Taken together, results support the notion that the physical restraint involved in immobility induction is an aversive event. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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