During which period in Canadian history did the use of Ritalin to treat ADHD increase by up to 4.5 times its previous use?

The first step in solving a problem is to ______

a. create a representation of the problem b. eliminate functional fixedness c. conduct a means end analysis d. decide on using either an algorithm or heuristic strategy

At 6 months of age, American infants sleep about 14 hours a day, whereas infants who are the same age in Kenya sleep about 12 hours a day, and infants in the Netherlands sleep about 16 hours a day. This variation is best described by ____

a. reflexive responses b. cultural practice c. innate preprogramming d. biological influence