Experiential deprivation and later behavior.

Our experiments on the effects of experimental deprivation upon later behavior of dogs have dealt with four major areas. The programming of life histories has involved the scheduling of breaks in isolation and the introduction of specific stimuli to isolation cages. Biweekly breaks, of less than 10 minutes each, largely counteract the effects of isolation. An opportunity for the animal to look out of the isolation cage has some counteracting effect, but the presence of playthings or rearing with a companion does not.