Norm Group: A norm group is a representative sample used for comparison purposes to determine how an individual's scores compare to others.
Standard Deviation:Standard deviation measures how much variability there is within a set of scores. It helps determine where an individual's score falls compared to the average.
Bell Curve: The bell curve, also known as the normal distribution, represents the distribution of scores in many psychological tests. It shows that most scores fall near the average, with fewer scores falling further away from the average.