Differences in sleep patterns and symptoms among the various ethnic groups may reflect differences in

According to the textbook, if health researchers wish to continue the trend toward an improved quality of life, they must attempt to decrease deaths associated with

a. lifestyle factors. b. infectious disease. c. primitive civilizations. d. the lack of vaccines.

The NICHD Study of Early Child Care confirms that

A) the majority of babies in child care display a resistant attachment to their mothers. B) infants are not at risk for attachment insecurity due to inadequate child care. C) parenting quality exerts a more powerful impact on children's adjustment than does exposure to child care. D) regardless of quality, child care predicts long-term adjustment problems.