Why is it wise to randomise?
We've had lots of questions about randomisation, so Professor Helen Minnis has made a video to explain why randomisation is both helpful and ethical. We've chopped the video into "bite size bits" (duration 45 seconds to 2 minutes), so you can watch it bit-by-bit or all at once, which is under 10 minutes.
"Bite size"
How does randomisation help with confounding?