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Start with a standard-setting form and grow the pool

The advice. “Start with standard setting form – one set of scorable items and one set of non-scorable items (20 items). Once one test form has been administered to enough candidates, start production of next test form. Once non-scorable items are working enough, they go to scorable.”

Why. A concrete build sequence that resolves the low-incidence bind without waiving the 100-examinee equating threshold. Every administration does double duty: it produces scores from the scorable set and simultaneously field-tests twenty embedded items. Item statistics accumulate at the same rate examinees do, so the pool grows as a by-product of operating the programme rather than requiring a separate field test that low-incidence fields cannot fill.

Status. Open.

Related. MTTC Meaningfully Different Forms · Stick with 100 examinees per form, not 200