Hamm v. Smith · ¶138

Our case law has thus laid out three rules concerning IQ and Atkins claims. First, Atkins does not bar the execution of a defendant who fails to prove an IQ of 70 or lower. Second, when determining whether a defendant has met this 70IQ threshold, a court may not treat any one score as dispositive without considering a confidence interval based on the test's standard error of measurement. And third, courts may not use extrinsic, defendant-specific details to infer where his IQ falls within a given interval.

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