The "father of epidemiology" is considered to be

The kind of learning that applies to voluntary behavior is called __________________

a) operant conditioning b) classical conditioning c) effective based learning d) spontaneous recovery

Irina is a happy, cheerful baby who adjusts well to new situations. She sleeps, eats, and toilets on a regular schedule. Thomas and Chess would categorize Irina's temperament as

a. emotional. c. slow-to-warm-up. b. easy. d. difficult.