Analysis Mode is a state which hosts enter and leave on command. Showrunner Lisa Joy likens Analysis Mode in the hosts to the unconscious mind in humans. While in Character Mode, hosts seem unaware of what has transpired when they were in Analysis Mode.
This mode is used by staff to maintain, adjust, and to diagnose problems with hosts. In this mode, hosts can answer questions and perform actions, but do not appear to initiate conversation or actions.
While in Analysis Mode, hosts often do not appear to make eye contact, or seem as if they are completely unfocused. However, there are also numerous times when hosts in Analysis Mode do make eye contact with their interviewers.