Consistent leverpress avoidance responding by rats

Burying as a defensive response in rats.

“…the size of the chamber so it isjj.ust^large: enough to accommodate the subject (Cahoon § Crosty 1 , 1969; .Azrin, . Hopwood f, Powell, 1-967).14) -providing, either exposure^or-access"-to • a 'safe' compart-important conclusion that can be drawn from these data is that no environmental variables-ha's been found that makes .bar-pressing to avoid shock as easy for a rat to learn,as jumping (Maatch, 1959) or running(Theios, 1963), Evennihatheemost successful studies-of bar-press avoidance (e.g.,Hull, Myer, $ Smith, 1975;Delprato $ Holmes, .. 1977…”