The outdated term for infant-directed speech is

_____ drug _____ results from the body's and brain's natural ability to protect itself against harmful substances

a) Psychological; tolerance b) Physical; dependence c) Emotional; addiction d) Physical; withdrawal

Marco, who has taken IQ tests at two different time periods, has declined in IQ. Research indicates that children like Marco often have parents who

A) use either very severe or very lax discipline. B) overstimulate them with extracurricular activities. C) apply great pressure to succeed. D) are overinvolved in their children's lives.