==comment==This from an IMDb commenter:
This was one of the last science-fiction adventure relics from the 1950s to early 1960s before the JFK assassination changed the mood of this genre to something less innocent and more grim. Lovely Julie Adams portrays a psychologist who tests engineer William Lundigan to ascertain that he can lead a construction effort to build the world's first underwater metropolis. After completion, the couple plus several others, move down to the city, until it is discovered that it was built on a fault line, creating climactic chaos.Julie Adams as the scientist:
This, I presume, is part of the "testing" process:
Julie Adams was also in The Creature from the Black Lagoon