Which of the Following Describes a Risk Associated with Cross-Sectional

question 61

Multiple Choice

Which of the following describes a risk associated with cross-sectional research on IQ?

• A)In a cross-sectional study that compares IQ scores,the difference in IQ scores of 25-year-olds and 45-year-olds is due to differences in educational attainment.
• B)In a cross-sectional study that compares IQ scores,the difference in IQ scores of 25-year-olds and 45-year-olds is due to the 45-year-olds having taken the same test at several points in time.
• C)In a cross-sectional study,the participants may move or die before the study has been completed.
• D)In a cross-sectional study,the researchers incur significant expenditure of time as he or she waits for the participants to get older.

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Definitions:

Small Intestine

A long, coiled tube in the digestive system where most of the absorption of nutrients and minerals from food takes place.

Duodenum

The first section of the small intestine immediately beyond the stomach, which receives partially digested food from the stomach and begins the absorption of nutrients.

Jejunum

The middle section of the small intestine between the duodenum and ileum, where most of the nutrients from food are absorbed.

Ileum

The final and longest segment of the small intestine, important in the digestion and absorption of nutrients.