st pauli girl: I would also wonder how much of an outsized effect gifted children may have had on the study, because if parents of gifted children are frequently switching schools to find a reasonable fit, and they're not finding it, then that begs the question of causality - were the gifted children in this study more apt to develop psychotic symptoms because they were frequently switching schools, or was it because of the poor educational fit that triggered the frequent school switching?

The study cited "chronic marginalization and chronic exclusion" as the underlying causes... don't gifted children often find themselves confronted with those even when they stay in the same schools?