Earlier quoted context omitted.
Societal norms are constantly evolving; what is normal today might have been unthinkable in the past when these studies were conducted.
Also; awareness of the bystander effect may have led to increased pro-activeness. This is really something that would need to have data going further back to figure out if the original effect existed. See another post in this thread where someone has recieved specific training to counteract the bystander effect.
nobody else is doing anything and therefore I won't do anything
but if society has changed and somebody does get involved, it would be more like that other guy is doing something and therefore I will get involved too
because we are social animals and we do what feels right, what we see others doing. So, although the outcomes might have changed, the process is still the same.I remember reading a book some years ago (Lauren Slater, Opening Skinners Box) about some of the psychological experiments which had been done in the past. One of the general conclusions of those experiments that stood out to me seemed to be that only about 30% of people would actively take initiative if given the chance, but that generall people would follow social leads. I remember passing this book around at work to a couple of friends who both said that they felt that reading about this concept made them feel as if they were more aware of the social pressures to not act in situations and that they would therefore be more likely to step up as a result.