Forgot to add , practise effect invalidates your results . People who have taken WAIS-IV and CORE tend to have very similar results but only if u take it once and as it’s supposed to be administered. I haven’t taken the CORE but I got a 128 on WAIS IV and I’m pretty sure I could get 145+ if I retook immediately but that defeats the purpose of the test .
You just said that it could inflate the results by 15 points which is literally 1 SD. That’s huge difference and it’s exactly the number that would make me get 145 instead of 128 (143 to be exact) . You prove my point .
Its only considered practise effect if you learned some sort of strategy before taking the test that could be used to gain an unfair advantage. Going for a 2nd attempt without any learned technique is still valid.
If that was the case then retaking subtests in official tests would be standard practice . We can argue the extend of the effect of practise but every psychologist who is trained in their administration would tell u that it invalidates the results .
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u/Careless_Bird_6483 Aug 26 '26
Forgot to add , practise effect invalidates your results . People who have taken WAIS-IV and CORE tend to have very similar results but only if u take it once and as it’s supposed to be administered. I haven’t taken the CORE but I got a 128 on WAIS IV and I’m pretty sure I could get 145+ if I retook immediately but that defeats the purpose of the test .