The interview – body language skills
You finally have the interview. Therefore, it is important to remember that how you carry yourself during an interview is as equally important as to how you present yourself and answer questions during the interview process. During the interview you want to convey a sense of confidence, not arrogance or disinterest. Body language can send these messages to the interviewer regardless of what you are saying.
Follow these recommendations to project poise and confidence (not jitters and arrogance) during your next job interview.
The waiting room
You want to put on your confidence even before the interview commences. In the waiting area, have good posture while standing and sitting. Keep your back straight and your chin parallel to the ground. While you may not have met your interviewer at this point, it's still possible that the receptionist or potential future co-workers are observing you.
When you sit down to wait, place your briefcase or purse to the left side of your chair — that will reduce awkwardness when you have to shake the interviewer's hand, and grab your personal items.
The handshake
Most likely, the handshake will be your only moment of physical contact with the interviewer. Studies say that handshakes play a significant role in first impressions, so make it count.
Your shake should be neither bone crushing, nor limp fish. Aim for a firm handshake, and as you shake, make eye contact and smile.
During the interview
While first impressions do count for a lot, it's during your conversation the interviewers will have an extended time to get to know you a little better.
Your answers to questions are important, as is your stance while listening and responding. Keep these body language tips in mind:
Posture and sitting style: First and foremost: No slumping! Keep your back straight. Lean forward slightly to indicate interest. Do not recline back into the chair fully; this can make you seem bored or disengaged.
Avoid crossing your arms or placing items in your lap; these habits indicate defensiveness, nerves, and a need for self-protection, when what you'd ideally convey during an interview is confidence.
Tip: If you're offered a choice of seating, opt for the straight-backed chair —plush, cushioned chairs and couches may be comfy, but it's hard to sit gracefully within them.
Avoid crossing your legs: Crossing and re-crossing your legs will come across as fidgeting.
Suppress restless habits: Speaking of fidgeting…if you're a nail-biter, knuckle cracker, hair twirler, or leg tapper, don't allow these habits to make an appearance during the interview. All will appear unprofessional and convey nerves.
Use your hands: Do you naturally talk with your hands? Go ahead and let them move during the interview. Stopping the natural gestures may lead to an awkward appearance. Just make sure your motions don't become so enthusiastic that they distract from your words.
Eye contact: It's important to make eye contact during your interview, but don’t mistake that for a directive to make constant eye contact. That is disconcerting and aggressive. At the same time, avoiding eye contact entirely comes across as untrustworthy and distant — it could make it seem like your answers are dishonest. Balance it out: Aim to make eye contact as you listen and respond to questions, but allow it to break occasionally, and let your eyes wander. Remember that if there is more than one person in the interview, you need to make eye contact with all of them initially and whenever a question is posed to you from that person.
Adapted from: https://www.thebalance.com/body-language-tips-for-your-next-job-interview-2060576