A Researcher Measures the Amount of Time Older Adults Spend

Multiple Choice

A researcher measures the amount of time older adults spend each week engaging in mentally challenging activities and also the scores they earn on a test of intelligence.The researcher finds that the more time older adults spend engaging in mentally challenging activities,the higher their scores on the intelligence test.On the basis of this finding,which of the following conclusions would the researcher be justified in drawing?

A) Engaging in mentally challenging activities causes intelligence test scores to increase.
B) Spending too little time engaging in mentally challenging activities causes intelligence test scores to decline.
C) Amount of time spent engaging in mentally challenging activities and intelligence test scores are positively related (positively correlated) .
D) Amount of time spent engaging in mentally challenging activities and intelligence test scores are negatively related (negatively correlated) .