I kite ngā kaimātai tangata, ā, ko Leonard Lieberman rāua ko Fatimah Linda Jackson, "Ko ngā tauira koretake o te heterogeneity e kii ana i ngā korero mо̄ te taupori me te mea he о̄ritetanga matai iranga, he mea rānei kua ara mai nā ngā āhuatanga o te taiao ". "