K. Warner Schaie's longitudinal data from his research in 1994 shows that spatial orientation and numeric ability _____ in late adulthood

In experimental research, the independent variable is

a. the response made by the subject b. the group receiving the placebo c. actively manipulated by the experimenter d. the control group

The DSM-5

A) ?has multiple axes to make a distinction between disorders. B) ?uses axes to make notations about physical illnesses, stressors, and global functioning. C) ?uses a dimensional approach. D) ?uses a categorical approach.