In a well-known study conducted by Schachter and Singer, wherein participants were injected either with a stimulant or a placebo and were then exposed to a highly emotional stimulus, it was found that participants showed the strongest emotional reactions when ____
a. they were injected with a stimulant (and knew it)
b. they were injected with a stimulant (but didn't know it)
c. they were injected with a placebo (and knew it)
d. they were injected with a placebo (but didn't know it)
B
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Extremely low-birth-weight infants are
a. defined as having a birth weight of less than three pounds. b. unlikely to have medical issues that last beyond childhood. c. at risk for blindness, deafness, and autism. d. becoming significantly rarer.
Molecules that can cross the blood-brain barrier are usually ____
a. large, uncharged molecules, such as lactose b. large, charged molecules c. neurotransmitters, such as dopamine d. molecules that can dissolve in the fats of the capillary walls
What is a challenge to using physiological measures when conducting developmental research? Use an example to support your answer.
What will be an ideal response?
Shyness in the extreme is called social anxiety, or
a. biological predisposition b. social phobia c. pathological avoidance d. social unfamiliarity