Research on lead exposure during childhood reveals that
A) middle-SES children are more likely than low-SES children to experience lead exposure.
B) use of iron and zinc supplements increases lead concentration in the blood.
C) persistent childhood lead exposure is linked to diabetes in adulthood.
D) a stressed, disorganized home life seems to heighten lead-induced damage.
Answer: D
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The bystander effect does not tend to occur when the bystanders are
a. all friends. b. all strangers. c. only in one's mind. d. on the Internet.
At 23 weeks of gestation, a baby's foot will appear
a. the same as full term but much smaller. b. malformed but nearly as large as full term. c. unlike a foot. d. without five distinct toes.
Which psychic structure motivates a hungry infant to suck his/her thumb while waiting for a bottle to be prepared?
a. id c. superego b. ego d. none of these
Social learning theory emphasizes:
cooperation with others. observation and imitation. reinforcers. understanding how one's behavior affects other people.