i agree with another poster...if this individual has been dealing with full on Schizophrenia without long term treatment, any IQ estimate is going to be off base until they've been stabilized for a while.

it is worth noting that high doses of the older drugs (in particular) were/are linked to "tardive dementia," a measurable loss of intellectual capacity. many people with tardive dyskinesia also have varying degrees of loss of IQ, which is why some 'experts' think/thought of TD as a 'dementing disorder' (I don't know if this applies with atypicals...TD is less frequent and usually less severe than with, say, long term, high dose Prolixin).

and...you know how mothers are notorious, as a group, for making up frightening tales to scare young children into compliance? yeah...I think this tale of woe follows the same sort of theme... :-)