Personality tests suggest that which of the following has increased from one cohort to the next?

The neurotoxin, 6-hydroxydopamine (6-OHDA) selectively destroys

A) neurons that release dopamine or norepinephrine. B) axons. C) cell bodies. D) multipolar neurons. E) the hypothalamus.

The undermining of intrinsic interest through the introduction of extrinsic reward is also known as the _________________ effect

Fill in the blank(s) with the appropriate word(s).