Having two examiners evaluate the same child's responses during an activity and then comparing their evaluations for consistency allows researchers to evaluate:

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By having two examiners evaluate the same child's responses during an activity and then comparing their evaluations for consistency, researchers are assessing interrater reliability, which measures the degree of agreement or consistency between different raters or observers. Test-retest reliability measures the consistency of test results over time, validity refers to the degree to which a test measures what it is supposed to measure, and cohort effects relate to the impact of a person's birth year or generation on their development.

Having Two Examiners Evaluate the Same Child's Responses During an Activity