Body language research in interview contexts is frequently overstated and sometimes exaggerated. The famous claim that 93% of communication is nonverbal is not accurate and has been widely misrepresented.
What is well-supported: interviewers do form meaningful impressions from nonverbal signals, and those impressions do affect hiring outcomes. The signals that matter most are more specific than the general "power pose" advice that circulates online.
What Interviewers Actually Respond To
Eye contact, calibrated. Too little eye contact reads as evasion or low confidence. Too much reads as aggressive or socially unaware. The appropriate range is roughly 60-70% eye contact during conversation, with natural breaks when you are thinking or explaining something complex. This maps to how confident, engaged people behave in normal professional conversation.
Stillness under pressure. Candidates who move a great deal, shift in their chairs, play with their hands, or make frequent self-touching gestures (touching their face, neck, or hair) read as anxious. You do not need to be completely still. Small, natural movements are normal. Constant movement is not.
Posture that stays open. Crossed arms, a closed chest, or a forward hunch can read as defensive or disengaged, depending on context. A relaxed, upright posture signals that you are present and confident. Leaning slightly forward during key points signals engagement.
Nodding at appropriate moments. Brief nodding while the interviewer is speaking signals attention and comprehension. This is a small signal but interviewers notice it, because candidates who do not nod at all can seem disengaged.
For Video Interviews
The signals shift on video. Eye contact on video means looking at the camera, not the interviewer's face on screen. Facial expressions need to be slightly more expressive than in person, because compression and screen size reduce the clarity of small expressions.
Stillness matters even more on video, because small movements are amplified by the camera and more visually distracting in a small frame.
What to Actually Practice
Record yourself answering interview questions on video and watch the footage without sound. Pay attention only to what you see. This is the version of your performance that your interviewer is processing alongside everything else. Most people are surprised by the gap between how they think they look and how they actually look.
Signal's webcam analysis measures head stability, expressiveness, eye contact percentage, and blink rate across every practice session. The patterns that show up across multiple sessions are the ones most worth addressing.