Discuss why historical evidence is not sufficient to establish a scientific principle. Why are controlled studies needed for social psychological theory and conclusions?

A teacher provides positive reinforcement every two times Katherine waits until she is called on to answer a question. What type of reinforcement schedule is the teacher using?

a. Fixed ratio b. Variable ratio c. Fixed interval d. Variable interval

Personality plays a big role in, people high in the trait of ________report more medical problems and more visit to the doctor

a. conscientiousness c. extraversion b. open to experience d. neuroticism