Substances which change the central nervous system include prescription illegal drugs?

According to the article, what are some of the drawbacks of traditional intelligence tests, and what is being done to rectify these issues?

Astudent who takes a multiple-choice test by reading the stem of each item, generating the correct response before looking at the choices, and then chooses the response closes to the answer is using a.a heuristic b.an algorithm c.vicarious problem-solving d.means-end analysis

What did executive order 9981 accomplish