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This week, the Food and Drug Administration authorized a third dose of the Pfizer-BioNTech Covid vaccine for children ages 5 to 11. What proportion of children in this group have received the first two doses?

More than a quarter

Fewer than a third

Approximately half

Nearly three-quarters

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The Diagnostic and Statistical Manual of Mental Disorders lists 18 potential symptoms of A.D.H.D., many of which occur from time to time in all youngsters. How many criteria does the average “healthy” adult meet?

2

5

8

10

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Performing a push-up requires a cognizance of the body’s position from head to toe. What is the technical term for this kind of awareness?

Equilibrioception

Interoception