Based on years of research, what can we comfortably assert about IQ and reliability?
A) Score at age 6 correlates with score at age 18.
B) The older we get, the dumber we become, as measured by IQ.
C) There is no correlation between childhood IQ and IQ in adulthood.
D) IQ tests are valid but not reliable.

Question

Quizplus · Accepted Answer

Based on years of research, we can comfortably assert that score at age 6 correlates with score at age 18, indicating a high level of IQ reliability over time.

Answer: B and C are incorrect. 
 There is no evidence to support the claim that the older we get, the dumber we become, nor is there evidence to support the claim of no correlation between childhood IQ and IQ in adulthood. These claims are not supported by research.

Answer: D is incorrect. 
 IQ tests have been shown to be valid and reliable measures of cognitive ability.

Based on Years of Research, What Can We Comfortably Assert