Percentile rank refers to the proportion of scores that fall below a particular score.

In psychology, the term "percentile rank" refers to the percentage of scores in a distribution that are lower than a given score. Percentile rank is often used as a way of comparing an individual's score on a test or measure to the scores of others in the same population.

For example, if an individual's score on a test is in the 85th percentile, it means that 85% of the scores in the distribution are lower than their score and 15% of the scores are higher. Percentile ranks can be useful for understanding how an individual's score compares to others and for identifying patterns or trends in a group's performance.

Examples of how percentile rank might be relevant in psychology include:

  • A psychologist might use percentile ranks to compare an individual's test scores to norms or standards for their age or other relevant demographic factors.
  • A researcher might use percentile ranks to compare the performance of different groups on a test or measure, such as to explore differences in ability or achievement.
  • A therapist might use percentile ranks to help a client understand their performance on a test or measure and how it compares to others.
  • A person might talk about their percentile rank on a test as a way of describing their relative standing or performance compared to others.

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