Using the average score to describe a sample is an example of inferential statistics

Based on Shepard and Metzler's research on mental rotation, which of the following

statements is TRUE? a. Humans are not very accurate in judging whether pairs of geometrical shapes are the same or different. b. Decision times decreased when one of the shapes was rotated. c. The rotation of one of the shapes produced more correct answers than rotation of the other shape. d. As the degree of rotation of the shapes increased, decision times increased. e. The degree of rotation had no effect on decision time; only the difference in size affected decision time.

_____ is the neurotransmitter released during REM sleep that is responsible for increasing blood pressure, heart rate, and respiration

Fill in the blank with correct word