Behavior I - They Can’t Help It
Innate behavior: pre-determined, fixed “action program” stimulus ? innate releasing mechanism ? fixed action pattern
- Goose egg-rolling response does not change if
- egg is removed during recovery
- egg is replaced by artificial object (which is removed from nest as soon as egg-rolling response is completed)
- alternative objects of larger size are added and preferred (supernormal stimuli ? usually do not occur in nature)