Seems like this paper refutes other refutations about previous studies producing helmet disparaging data. Who to believe? I guess I'll just believe these conclusions until the next refutation comes along.
On a more serious note, I assume that conclusions about helmet safety predicated on motorist passing behavior (which I already pretty much just intuitively reject) could not be safely extrapolated to include much larger and more visible multi-person passenger bearing bikes. They are very different visually and culturally and motorists almost certainly behave differently around them, so I'm gonna require new data that takes these different psychological effects into account.
On a more serious note, I assume that conclusions about helmet safety predicated on motorist passing behavior (which I already pretty much just intuitively reject) could not be safely extrapolated to include much larger and more visible multi-person passenger bearing bikes. They are very different visually and culturally and motorists almost certainly behave differently around them, so I'm gonna require new data that takes these different psychological effects into account.