tyred said:I would say it's an almost impossible question to answer as each and every accident will be different.
I think we all wish to see some kind of NCAP testing of helmets, that would give us some better answers I suspect.
Oh and Scook, Risk Compensation is something we all do, everyday but it's not something you consciously make a decision about, it's just about adjusting subconsciously to continuous input from the environment around you. You may not compensate for wearing a helmet but others do on your behalf.
Also if you wear one all the time, leave it off one day. Does that slippy bend still feel the same sans helmet. I'd look hard at you if you told me it made no difference.
And just for the record, I do wear a helmet and I have fractured my skull in a bike accident but like most, I'm against compulsion and realistic about what a helmet will protect me from, or not.