Hold to keep the item visible · drop the orb into your answer
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Three example items, in the test's own interface: one verbal, one numerical and one abstract. Nothing here is scored and nothing is recorded; these are the practice items every candidate sees, and the live bank is not on this page.
Welcome. Here is your first section.
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Your clock is still running on the current item, and the item is hidden while you are here.
In a live sitting the items keep coming, each one chosen from the response before it, and the trace you just produced is read alongside the answers. Nothing from this page was scored or stored.
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The composite is a unit-weighted mean of the three scale θs, restandardised to the reporting metric assuming an inter-scale correlation of 0.55. Measurement errors are independent across separately-administered scales, so the composite is more reliable than any scale in it. Differential weighting needs a validated factor structure or criterion data, and until you have either, unit weights are the defensible choice. Reporting is floored at θ = −2.50: below that the scale carries no discrimination, so everyone reports STEN 1 and we say so rather than implying a difference that is not there.
The IAI in this prototype is an illustrative heuristic, not a validated classifier. In production it is a logistic model trained on labelled human and synthetic sessions, and it returns a review flag with reason codes, never an automatic determination. No candidate should be failed on telemetry alone.