Studies have shown that about __________ new neurons are created each hour in the hippocampus of adult animals?

A test designed to measure the degree to which knowledge has been learned would be referred to as a(n) ______ test

a. matrices b. achievement c. aptitude d. normative

Yuri received a score of 115 on his IQ test and as a result is a part of the 84th percentile. In terms of his score compared to the population, this result means that:

a. 84% of the population's scores are lower than Yuri's score. b. 84% of the population's scores are higher than Yuri's score. c. 16% of the population's scores are equivalent to Yuri's score. d. 84% of the population's scores are equivalent to Yuri's score.