Piaget suggested that individuals reach the ability to think abstractly around the age of 9

Here is a reasoning problem: If Mary is a psychology major at your college, then she must take statistics. Mary graduates from your college without taking statistics. Therefore, Mary is not a psychology major. What kind of problem is this?

a. analogy b. conditional reasoning problem c. the crystal-ball technique d. syllogism

When Myers and Sperry severed the corpus callosum in cats, they found that:

a. one side of the brain did not know what the other side was doing. b. abnormal eating behaviors occurred because the cats could not regulate hunger. c. the left side of the cats' bodies were not affected by this operation. d. disorganized electrical activity spread from one hemisphere to the other.