Poor prenatal care is an environmental factor that hinders intelligence

Which of the following statements about individual differences in cognitive declines is true?

A) Cognitive declines occur earlier in people with complex occupations. B) People with flexible personalities are likely to maintain mental abilities well into late adulthood. C) There is no known correlation between SES and intellectual decline. D) Early retirement, whether forced or by choice, contributes to rapid intellectual decline in older adults.

Reliability of a test is affected by

a) the characteristics of the people taking the test b) the method used to estimate reliability c) the intended use of the test scores d) all of the above