Nudge theory: when your smart gadgets nag you

Are constant reminders from home and health gizmos effective in changing behaviours? Silicon Valley would like you to think so

Does nagging work? My mother would say so, and indeed her reminders to wear a helmet when cycling probably saved me a cracked skull a few years back. But what if the pokes and prods to do better and be better are coming not from someone who truly cares for your well being, but from a gadget programmed in Silicon Valley?

That's the promise - and threat - of the internet of things, from wearable devices such as fitness bands to smart home gadgetry including connected scales and fridges. Here's the idea: that fitness band will count your steps and inspire you to walk more. Or, in the future, your scales will tell your fridge you're above your goal weight, and suggest a salad for dinner rather than pizza - even if the latter is exactly the mood-boosting treat you need after a stressful day.