
Subliminal messaging may have been a factor, as a child states on his terminal that he was hearing high-pitched noises, and so were his friends.

The main purpose of the Vault's experiment was to induce paranoia through non-chemical and non-violent means. Vault 19 was unique in that it had two overseers, one for the Red Sector, one for the Blue Sector. The inhabitants of Vault 19 were segregated into two different colored sectors, red and blue, with limited contact between them.
