What process is commonly used to check for test-retest reliability?

Test-retest reliability refers to the consistency of a measure over time. To assess this reliability, researchers typically administer the same test to the same group of participants on two or more different occasions. This approach allows for the examination of whether scores are stable across time, indicating that the measurement is reliable. High correlation between the scores from the first and subsequent tests suggests good test-retest reliability, as it implies that the test yields similar results under consistent conditions.

The other methods mentioned do not specifically measure test-retest reliability. A pilot study is primarily used to test the feasibility of a research design, identify potential issues, and refine methodologies rather than to assess reliability over time. Implementing a coding system might help in organizing data but does not assess measurement stability. Lastly, using a single observation lacks the necessary temporal comparison that test-retest reliability requires, as it only provides a snapshot rather than examining consistency over time.