Answer :
Final answer:
The cohort effect, in relation to IQ test scores, refers to the systematic differences between generations. Today's 20-year-olds tend to score higher than today's 60-year-olds. This does not imply that younger generations are more intelligent, but rather reflects changes in education, nutrition, and other factors that may have influenced the scores. the correct answer is C) There are systematic differences between the generations
Explanation:
The cohort effect refers to the systematic differences between generations. In the case of IQ test scores, it means that today's 20-year-olds score higher than today's 60-year-olds. This does not necessarily mean that younger generations are more intelligent, but rather it reflects changes such as improvements in education, nutrition, and access to information that may have influenced the scores. Therefore, option C) There are systematic differences between the generations, is the correct answer to the question.
Learn more about cohort effect here:
https://brainly.com/question/7580591
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