Without taking into account  that many of the recruits tested were new immigrants to the United States who lacked formal education  or English language exposure, they created an erroneous  intelligence hierarchy of ethnic groups.
Nisu razmotrili da su brojni ispitanici tek nedavno migrirali u SAD te nisu učili engleski ili bili s njime u doticaju. Tako su stvorili pogrešnu hijerarhiju inteligencije različitih etničkih skupina.