'You don't feel judged': Why we buy more at self-service terminals

On an industrial estate on the outskirts of Birkenhead on Merseyside, an English company is helping to shape the future of shopping.

These are the offices of Evoke Creative, which makes self-service terminals, the sort of things you see popping up everywhere from McDonald's to your local library.

One of the reasons those large touchscreens, also called kiosks, have become so popular with restaurant chains is that they can significantly increase sales.

And that is down to behavioural science, the study of how humans behave, and what drives people to make the choices that they do.

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