Percentile Rank

Definition

A percentile rank refers to the percentage of people in a norm group who scored lower than a particular individual on a test or assessment. For example, if you have a percentile rank of 75%, it means that you scored higher than 75% of the people in the norm group.

Related terms

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.