What is a major difference between norm-referenced reliability and validity and criterion-referenced reliability and validity?

Criterion-referenced liability compare a person’s knowledge or skills against a predetermined standard, learning goal, performance level, or other criterion. With criterion-referenced tests, each person’s performance is compared directly to the standard, without considering how other students perform on the test. Criterion-referenced tests often use “cut scores” to place students into categories such as “basic,” “proficient,” and “advanced.”

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Norm-referenced measures compare a person’s knowledge or skills to the knowledge or skills of the norm group. The composition of the norm group depends on the assessment. For student assessments, the norm group is often a nationally representative sample of several thousand students in the same grade (and sometimes, at the same point in the school year).