Which of the following expresses a true distinction regarding the current state of research into the effects of lead exposure on mental functioning and health?
a) High levels of lead exposure has been definitively linked to mental retardation, while the effects of low-level, asymptomatic exposure are more contradictory.
b) High levels of lead exposure has been definitively linked to mental retardation, while there is no evidence that low-level, asymptomatic exposure can harm intelligence.
c) High levels of lead exposure has been linked to mental retardation in children, while low-level, asymptomatic exposure has been linked to decrements in IQ in adults.
d) High levels of lead exposure has been linked to mental retardation, while low-level, asymptomatic exposure has been linked to behavioral problems.
Question 2
One distinction observed by Moore in her studies of adopted African-American children is that those adopted into white families
a) were more likely to spontaneously elaborate on responses than those adopted into African-American families.
b) were less more likely to spontaneously elaborate on responses than those adopted into African-American families.
c) were less likely to respond to a test demand than those adopted into African-American families.
d) scored lower on an IQ test than those adopted into African-American families.
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