“Don't make them read it while you're saying it.”


Ever tried reading a dense slide while someone talks over it?
You remember neither.
That’s the split attention effect in action.

💡 ONE IDEA WELL

When text and narration compete, everyone loses.
Cognitive load increases. Retention disappears.
And your message gets buried in the noise.

This is the split attention effect - when visuals and speech demand attention at the same time, but don’t align.

And yet, most of us still do this without realising…


They show complete sentences and talk through them.
But your audience can’t read and listen at once.
So they don’t.


🧰 LESS MESS, MORE MESSAGE

Here’s how to fix it:

  • Don’t narrate your slidecomplement it
  • Use images or key words to reinforce what you’re saying
  • Let the slide support your voice, not compete with it

If you want people to remember what you said,
don’t make them read it while you’re saying it.


🧭 ASK YOURSELF THIS

Am I making them choose between my slides and my voice?


Because if they have to choose…
they won’t remember either.



Speak soon,

Andy

P.S. Want to go full nerd? Here's the original study that changed how we think about slide design:

Sweller, J., & Chandler, P. (1991). Cognitive load theory and the format of instruction. Cognition and Instruction, 8(4), 293–332.

TEACHING ISN’T A SCRIPT. NEITHER IS THIS.

One idea a week to help you teach and present with more clarity, confidence, and calm. No fluff. No scripts. Just practical tools that land.

Read more from TEACHING ISN’T A SCRIPT. NEITHER IS THIS.

I was sitting halfway back in a local cinema. My kids beside me, hands deep in bags of sweets. On screen, Mario and Luigi were racing through the desert.Bright. Loud. Familiar. The sound effects were all there.The cues I recognised instantly. But the voice wasn’t. Chris Pratt instead of Charles Martinet. It should have worked. It didn’t. Next to me, my kids were completely absorbed. I wasn’t. A few days later, I found myself leaning forward in the same seat. A quiet karaoke scene before...

Why are we so uncomfortable with silence? In presentations. In meetings.In conversations. The moment a room goes quiet, we rush to fill it. Another slide. Another example. One more clarification. As if silence were failure. It isn’t. 💡 ONE IDEA WELL There’s a Japanese concept called ma (間). It means “the space between.” Not empty space.Intentional space. A painting isn’t just pigment - it’s pigment framed by blank canvas.Music isn’t just sound - it’s sound punctuated by rest.A powerful...

I watched the recordings of my talks this week. It’s not a comfortable experience. You see things you’d rather not see.You notice moments that felt different in your head.You realise how unreliable your memory is. But it’s also one of the most useful things I’ve done. 💡 ONE IDEA WELL If you want to get better at presenting,you probably don’t need more tips. Most of us already have enough of those. What we lack is something else. A clear view of what we’re actually doing. Because presenting...