But then the psychologist determines that you're one of the types that would have normally have used an 'overview' perspective, branding you either 'too smart'

But then the psychologist determines that you're one of the types that would have normally have used an 'overview' perspective, branding you either 'too smart' or 'a manipulator', neither of which is good. For another failure mode: they should repeat the experiment such that some people in both groups are told in no uncertain terms that the other party thinks they are lying. How many of the 'truth speakers' would start drawing overview pictures in order to try and convince the other that they must have been there? Or for another variety: allow everyone to visit the location and have the talk, but tell one half to do everything to lie about it and introduce some stress. Some people crack so soon under stress that they will actually start believing their own lies. This entire line of investigation is useless.