Try not to worry too much about how you are reading the response of any members of the interview panel as during the interview they are busy taking notes and interpreting your answers to see what sort of a person you are. Remember they are interviewing alot of people and do not want to give any false hopes to candidates earlier than decisions have been made.
After my interview I was far from confident but in the end it all turned out well. Anyone who sits a panel interview will always feel that they have alienated a member, must be a good cop, bad cop routine.
Best of luck
