Janie Is a 3-Month-Old Infant Participating in an Experiment

question 15

Multiple Choice

Janie is a 3-month-old infant participating in an experiment. She's lying in her crib with one end of a ribbon tied to her foot and the other end tied to a mobile dangling over her crib. She quickly learns that she controls the movement of the mobile with her kicking. One week later, the researchers return, tie the ribbon to her foot, and hang the mobile above her crib. Immediately, Janie starts vigorously kicking her leg. What does this experiment demonstrate?

• A) Three-month-olds can remember things for at least a week.
• B) Three-month-olds can relearn the kicking strategy very quickly at the second test.
• C) Kicking behavior is very easy to learn.
• D) Mobiles are very interesting to 3-month-olds.

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Definitions:

Basal Metabolic Rate (BMR)

Amount of energy used in a unit of time by a fasting, resting subject to maintain vital functions.

Nutrient Density

A measure of the amount of nutrients a food contains in comparison to the number of calories. Foods high in nutrient density provide a large amount of nutrients for a small amount of calories.

Urinary Sodium

Refers to the amount of sodium excreted in urine, used as an indicator of sodium intake and kidney function.

Calorie-Dense Fluids

Fluids that are high in calories, often used in dietary contexts to refer to beverages that provide a significant amount of energy but may lack nutritional value.