__________ are the persistent sensations of color followed by the perception of the complementary color when the first color is removed

Piaget is a cognitive constructivist theorist. Vygotsky is a _____

a. behaviorist b. social constructivist c. Freudian theorist d. learning theorist

Parents of infants should be concerned about all of the following except

a. failure to thrive b. weight at the 95th percentile c. dental decay d. tripling birth weight by the age of 12 months