Reliability and Validity
The twin pillars of educational measurement — and the single largest block of marks in the 2022 paper.
Measurement & Evaluation: Foundations
In the 11 December 2022 Vice Principal paper, Educational Measurement & Evaluation supplied about 36 of 120 questions — roughly 90 of 300 marks. It was the largest single block in the paper, larger than language and reasoning combined.
This chapter covers the conceptual half of that block: what measurement and evaluation are, how tests are judged, and the twin pillars of validity and reliability. Chapters 2 and 3 cover item analysis/test construction and educational statistics respectively.
Questions from the 2022 paper answered by this chapter alone: Q69, Q73, Q74, Q76, Q97, Q98, Q99, Q100, Q103, Q104, Q105 — eleven questions, 27.5 marks, from one chapter.
Every one of those eleven is reproduced in the question bank at the end, marked [PYQ 2022].