Two of the main indicators of physiological drug dependence are _____ and _____

In the Ebbinghaus's tradition, savings are __________

a. the amount of information saved from forgetting over time b. the reduction in confusion from preexisting knowledge c. a reduction in the number of trials to relearn a set of information d. an increase in the speed with which memories are recalled

. Researchers have discovered that children experiencing Attention Deficit Hyperactivity Disorder (ADHD) show improvements if they attend classes involving behavioral and social skills, compared to a group of ADHD children who did not attend the classes

The group of children who attended the classes constitute the a. experimental group. b. independent group. c. control group. d. placebo group.