Body Language Question:

The ability to maintain eye contact is another indicator of confidence, honesty and openness. Staring at the floor or ceiling will make you appear lacking in confidence, distracted and like you're not listening - or perhaps like you don't even care. Also be aware of too many sidelong glances, which can make you look shifty. Astute observers of body language can apparently detect liars from their eye movements (such as looking up and to the right), as well as other body language giveaways.
Eye contact can be maintained for up to 10 seconds, but it's important not to stare too intently - that will just creep your interviewer out.