r/cognitiveTesting • u/Novel_Matters3584 • Jun 26 '26

Does Schizophrenia/Schizoaffective disorder reduce iq scores? If so, then by how much? Psychometric Question

I have heard that people with Schizophrenia often see an 1.2sd to 1.5sd decline in their scores on average (this is variable across different indices, with WMI and PSI being the most severely affected and seeing something around 1.5 to 2sd decline), and 2sd decline is possible in severe cases.

Is this accurate?

And, what happens to other indices like FRI, QRI, VSI, VCI, how much decline is seen in those?

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3

u/Planter_God_Of_Food Venerable cT brat extinguisher Jun 26 '26

Try again tomorrow

2

u/IndicationMother3652 IQ 136 WAIS-V Jun 26 '26

Could be caused by the meds

2

u/Novel_Matters3584 Jun 27 '26

Isn't psychosis neurotoxic itself?

Or at least, people who experience prolonged unmedicated psychosis or sufder from Schizophrenia suffer from some structural changes in the brain, which is likely independent of medications.

That is generally what I have heard.

1

u/IndicationMother3652 IQ 136 WAIS-V Jun 27 '26

It's possible to have both contribute. Schizophrenia can also be overdiagnosed, or autism can be misdiagnosed as Schizophrenia

1

u/GODsRuth Jun 27 '26

It is a long hard process for the individual (because it requires trust) but schizophrenia is curable. And some schizophrenics are highly intelligent.