Neonates tend to lose about 10% of their birth weight. After how many days does the neonate begin to regain the lost weight?

Olaf can reason consistently about real and tangible things. However, he cannot yet reason about abstract ideas or situations. Olaf is probably in Piaget's ______ stage

rational logic preoperational formal operational concrete operational

People are often more aggressive in a crowd (e.g. at a football game) than they would be on their own. Which of the following psychological perspectives does this represent?

a. Behaviorist perspective b. Learning perspective c. Sociocultural perspective d. Biological perspective