“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.

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