A few years ago a colleague attended an event with a company of data specialists. The company was experimenting with personalised learning for professionals. As I understand it they had lots of interesting ideas about personalising online learning. For example, if you got an answer wrong about marketing, you’d be routed to an easier set of questions. All well and good.
But they company was really buzzing about a side project they’d done. The company had asked a cohort of business executives to record what they had for breakfast before taking tests over a period of some months. By the end of the course they claimed that they were able to predict the whether or not someone was going to pass based on what they ate for breakfast.
I’ve always thought this story was fishy, but had the opportunity to think about it recently. Now it’s possible that they did find the miracle effect of muesli, but they probably didn’t.