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Module 2 of 6 · about 65 min · Badge: Round Builder

Inside a PT round

The scheme plan, homogeneity and stability checks, and how a round runs.

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What you will learn

5 lessons and a case study

  1. 1

    Planning a round: the scheme plan

    Say what a scheme plan settles before a round starts, choose levels and a matrix that test real routine work, and explain why evaluation rules are fixed in advance.

    Animated lesson · notes · check · about 11 minFree account
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  2. 2

    Homogeneity: are all the items the same?

    Run the ISO 13528 Annex B homogeneity check, calculate sw, sx and ss from duplicate results, judge ss against 0.3 σpt, and choose what to do when the check fails.

    Animated lesson · notes · check · about 13 minFree account
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  3. 3

    Stability and transport

    Check that PT items keep their value through storage and transport using |ȳ1 − ȳ2| ≤ 0.3 σpt, choose between classical and isochronous designs, and act when a check fails.

    Animated lesson · notes · check · about 10 minFree account
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  4. 4

    Running the round

    Write instructions that let participants handle and report a PT item without avoidable errors, apply the closing date and late-result rules consistently, and keep participants' identities confidential.

    Animated lesson · notes · check · about 10 minFree account
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  5. 5

    Collusion, falsification and the participant report

    Design a round so that sharing or inventing results is hard and pointless, spot the patterns that suggest it, and check that a participant report contains what ISO/IEC 17043 expects.

    Animated lesson · notes · check · about 9 minFree account
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  6. C

    Case: a homogeneity check fails two weeks before dispatch

    A glucose round fails its homogeneity check two weeks before dispatch. Work out ss, find the cause, decide what to do, and see what it means for scores and for participants.

    Case study · about 8 minFree account
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Module 2: Inside a PT round | EqasOnline Academy