What is the definition of Test-Retest Reliability in educational assessments?

Test-Retest Reliability refers to the consistency of test scores when the same assessment is administered to the same group of students at different points in time. This concept is crucial in educational assessments as it helps determine whether a test provides stable and reliable measurements of student knowledge or skill over time. If a test is reliable, students should score similarly on the same test if it is given again after a certain period, assuming their knowledge or abilities have not changed.

This form of reliability is essential for ensuring that the results of assessments are dependable and that any changes in scores are due to actual differences in student performance rather than inconsistencies in the test itself. By demonstrating test-retest reliability, educators can be confident that the test is measuring what it intends to measure, giving credibility to the assessment results and their interpretation for making instructional or administrative decisions.