The Mullers have just had a baby. Both parents must now adapt to the new demands of caring for an infant. This will require the form of intelligence that Sternberg calls

A professional counselor tests a hunch that government counselors older than 60 years are far happier in their positions than their counterparts in private practice. The researcher interviewed 100 older workers from both occupations and found that indeed government counselors were happier than those in private practice in their later years. What additional information might indicate a history threat of internal validity?

a. The government counselors had recently received a raise b. The private practice counselors were from one geographic region c. Several of the participants do not speak English as their first language d. The survey was too long

The brain growth that occurs in postnatal growth spurts is mostly due to

A) absence of the myelin sheath. B) proliferation of glial cells. C) decreases in the blood vessels to the brain. D) uninsulated axons.