Derris is a research assistant in dr smiths psychology lab, when the participant asked him what the conditions of the study were Derris replied I do not know this is an example of a ____________ study.

What factor was not mentioned in the book as a variable that has long-lasting effects on infant

temperament? A) heredity B) environment C) intelligence D) maturation

Studies of brain functioning, cognition, and behavior in children with fragile X syndrome reveal that in single gene disorders, the effects of genes on behavior are

a. direct. b. mediated by both brain development and cognitive functioning. c. influenced more by the environment than by alterations in brain development. d. impossible to determine.