What phenomenon has occurred when an operantly-conditioned response no longer occurs?

Which of the following is a contribution of Rene Descartes to modern psychology??

a. ?a mechanistic conception of the body. b. ?the theory of reflex action. c. ?mind-body interaction. d. ?localization of mental function in the brain. e. ?All of the choices are correct.

Eight-month-old Finnegan is playful and responds positively to changes. He generally has a happy mood, and he quickly developed a regular sleeping and feeding schedule. Based on this description from the New York Longitudinal Study, Finnegan would be categorized as a(n) child

a. pleasant b. secure c. positive d. easy e. slow-to-warm-up