Your Hands Are Part of the Message: The Science of Gesture, Credibility and Presence

Most people think gestures are the garnish of communication: something you add once the real message is sorted.

But the research says the opposite. Gestures are part of the message. When people can see your hands, they understand you more easily. And when your ideas feel easier to grasp, they see you as more competent and persuasive.

That’s why gesture on video is about cognition, credibility, and cultural fluency – all happening in the frame of your webcam or in-person.

Are Your Hands On The Dagger?

We trust people more when we can see their hands. There’s a simple evolutionary reason: hands signal intent. If we can’t see them, our brain does a tiny threat‑assessment loop.

Are you resting your hand on your sword?  Are you about to club me with a stone?  It’s all very primal. We may know our ‘please and thanks yous’ now but the old brain is very much there.

On video, that absence is louder because the frame is already a constraint.

So if your hands never appear, your audience subconsciously registers:

• “I don’t have the full picture.”
• “Something’s missing.”
• “I’m not fully sure what they’re signalling.”

If you’re speaking in a meeting, on stage or in a video presentation, the visibility of your hands and gestures is essential to presence as much as it is to meaning.

Ensure they’re seen.

Here’s what the behavioural science and cross‑cultural communication research tell us about gestures.

Why Gesture Level And Size Shapes Your Credibility

The expansiveness of your gestures influences whether you’re moving excessively or not enough. How much space you take up can increase or shrink your presence as a communicator.

Expansive gestures signal confidence, competence, and cognitive ease

A body of research shows that when presenting in-person, speakers who use gestures above the waist – inside what some researchers call the “power sphere”, audiences rated them as more confident, more authoritative, and more persuasive.

The study centred on CEOs delivering IPO roadshows is a perfect example.

When 900 people rated the credibility and trustworthiness of CEOs without hearing a word they said, the leaders who used more gesture were consistently judged as more competent and it was those CEOs whose companies received higher valuations.

When your gestures are hidden, or compressed into your lap, your presence shrinks with them. When your gestures are open, visible, and meaningfully expansive, your presence expands.

Gesture Height And The Credibility Risk

Here’s the nuance most people miss. When someone doesn’t already know your credibility – new client, new team – gestures that rise above your chin can read as:

• overly dramatic
• uncontained
• emotionally unregulated
• “trying too hard”

(There’s a visual here showing non-verbal communication differences between an uncomfortable, friendly and authoritative approach.)

On video, the camera exaggerates vertical movement. A gesture that feels natural in person can look like a semaphore signal online. Hence, the power sphere is the optimal area in which to keep your gestures. Here’s your rule of thumb: keep gestures between your sternum and your chin when you’re establishing credibility. I show you exactly how to do that in the video here.

The Illustrative Purpose Of Gesture

One of the most important functions of gesture is illustration. We don’t just wave our hands around for emphasis; we use them to draw meaning in the air. And when listeners can see that meaning, comprehension jumps.

A study published in The Conversation analysed 200,000 segments of TED Talks and ran controlled experiments with 1,600 participants. The researchers found that speakers who used illustrative gestures — movements that visually map onto the idea being expressed — were consistently rated as:

• clearer
• more competent
• more persuasive

The reason is beautifully simple:

“When ideas feel easier to grasp, people tend to see the speaker as more competent and persuasive.” – The Conversation

This is why it’s so vital to keep your hands visible and in frame on video. When your gestures disappear below the camera line, your audience loses access to one of the most efficient meaning‑making tools you have.

So the goal isn’t “use your hands more.”

It’s use your hands to make your ideas easier to understand.

This is vital for those technical presentations – especially to mixed audiences – where you need your audience to understand what you’re saying.

Showing emotion without being emotional

Your hands underline meaning and emotion. It’s both possible and necessary to express emotion if you want others to act. And you can do this without getting emotional. I show you how here.

They Don’t Believe You: It’s Culture

Gesture height is deeply cultural.

In Northern European and Anglo cultures, lower‑to‑mid gestures signal professionalism and control: and the research backs this up.

The study by psycholinguist, Sotaro Kita delves into a cross‑cultural review of gesture behaviour showing how diverse cultures use different gesture spaces, in both width, and vertical height.

Some cultures naturally use higher, broader, more expansive gestures, while others prefer contained, lower gestures.

It’s a culturally patterning that will guide you when presenting in specific cultures.

I learned this the hard way when I was directing TV presenters in Turkey.

We were days away from a global broadcast when I was told that if one presenter wasn’t “reined in,” they’d replace him. Me, being all English and polite, tried to make my point with tidy, upper‑torso‑level gestures. The rehearsal made it clear this had absolutely no effect.

So I watched how the local team communicated: how they signalled seriousness, how they asserted authority. Then, I copied. The next time, I raised my gestures to eye level, held eye contact longer than any Anglo‑Saxon nervous system is designed for, and delivered the same message.

The presenter looked like he’d been tasered.

In that moment, I may have become the devil incarnate in his eyes, but the behaviour changed instantly.

Goodbye friendship, hello power.

Because from Italy to Iran, the meaning shifts:

• A gesture that stays low can look weak, uncertain, or emotionally flat.
• To show conviction, you raise the gesture — especially on emphatic phrases.
• Contained gestures can read as withholding or insincere.

In these cultures, gesture height = emotional truth.

So if you’re speaking to a Mediterranean or Middle Eastern audience and you keep your hands politely hovering at rib‑height, you’re unintentionally dampening your message.

In other words: What reads as “credible” in London can read as “lukewarm” in Tehran or Naples.

I show you what this looks like in the video here, (I was so horrified at what I did – and it’s not edited out. You’ll see I self-corrected).

Your Actions

Your hands underline meaning, and help your listeners understand your message more deeply: whether they’re technical or not.

Ensure your movement:

1. stays in the frame of the screen.
2. fills the power sphere in person and on line.
3. matches your message – in person and on-line.
4. creates that in-person and on- screen presence and authority (Get that two-finger salute right from the video above).
5. considers cultural expectations.

Apply this to meetings, presentations on screen or in real life to look more confident, more credible, less robot and more human.

Need to some help with communicating: either verbally or non-verbally? Speak so others want to listen, hop on to a free 15-minute Discovery Call here to see if we can work together. No strings attached.

Photo by Anna Shvets at pexels.com