Pointing out that words like 'always' and 'any helmet' are overly broad. It was one study on car driver behaviour. It was on roads I use. Most experiments on

Pointing out that words like 'always' and 'any helmet' are overly broad. It was one study on car driver behaviour. It was on roads I use. Most experiments on helmet use shows increase in risk behaviour of the wearer. Observational studies are less important for decision making.