Stew asks the question: what sort of comments will people leave and how often? From what I’ve seen so far, comments are not generating raging debate – there tend to be from zero to one for most articles. Why is this? It seems to me that biologists fall into two categories – those who love, enthuse over and promote online participation/collaboration (a tiny minority) and those who don’t (most). What is it about the second group that holds them back? Perceived lack of time/rewards, ignorance, lack of computer literacy, laziness? I’m sure that there’s something psychological at work but I can’t quite define it.