What is the probability of getting three tails in three flips of a coin?

Juan thinks that the idea "birds of a feather flock together" has more merit than "opposites attract." So he designs an experiment to test his hypothesis. Juan is most likely a

a. personality psychologist. b. social psychologist. c. sociologist. d. journalist.

Piaget suggested that the development of conservation, as applied to specific tasks, is sequential. Which of the following tends to develop first?

a. Conservation of mass b. Conservation of weight c. Conservation of volume d. Conservation of depth