It is not for nothing that the experts advise you to take interviews seriously. The seasoned interviewer will be continuously watching your moves closely to evaluate whether he can put his money on you, in spite of your good academic performance. Complacency, lack of knowledge, aptitude and all behavioral traits will be noticed without you being aware of it, and along with your hard skills they determine your selection (or not) for the job.
Your Speech Is Connected to Your Body Language
Statisticians agree that 55-65% of all communications between people is through body language. Of this, about 30-40% is transmitted through voice modulation. This leaves us with just about 10-15% for verbal communication. This set of statistics goes to emphasize that interviewers depend at least equally on what they see if not more than what they hear.
Interpreting non verbal behavior is a new but effective branch of science. If you didn't already know, it is the same science that detectives use in interrogations. Attempting to lie in interrogations or interviews will meet the same end because of your body language. No sooner than you attempt to lie, your body begins to give signals away of it via deceptive body language.
Body Manifestations and Their Interpretations
The manifestations of behaviors begin quickly in the form of restlessness and uneasiness of the subconscious mind. However, the physiology is such that it tends to oppose these abnormal stresses, resulting in a build-up of stresses inside you.
How will this manifest and will it show openly? The impulsive stresses begin surfacing as a non-stop shifting in your seat, avoiding eye contact with the interviewer, faint voice, changed facial expressions and finally a changed tone of voice. As failing in a promising interview is probably the last thing you want, you will not want to have any misconceptions or misguidance about the importance of your non-verbal behavior in job interviews.
