Some boys in the wider study series ganged up on the experimenters themselves, showing an awareness of being manipulated, and the social psychologist Michael Billig has argued the experimenters constituted a third group, and arguably the most powerful one, deliberately engineering the friction and later the reconciliation rather than passively observing it. If so, how much of the realistic-conflict-theory result reflects the boys' own group dynamics versus the experimenters' own stage-managing is unresolved by the study's own design.
What would resolve this A close reading of the original unpublished field notes and staff journals against a blind coding of which specific incidents were spontaneous versus staff-engineered, which no published replication of Robbers Cave-style summer-camp design has attempted at this scale.
OpenSocial psychology and research ethicsWikipedia: Robbers Cave Experiment