Calvin, who is trying to impress his psychology professor with his knowledge of infant motor development, asks why some infants learn to roll over before they lift their heads from a prone position, while others develop these skills in the opposite order. What should Calvin's professor conclude from this question

Calvin's professor can conclude that Calvin has been an observational kid.

Explanation:

The observation Calvin makes is a rather arbitrary one but one that can invite broader concern nonetheless.

Some kids start bobbing their heads and raising them before they can ever turn while the other develop these skills in the opposite order.

It would remain to be seen if Calvin would think something can be inferred from this otherwise rather standalone observation of things or not as there may be a study on how far this can be taken in child psychology.

At any rate, he is an observational student and the professor can put that to use.

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