>The study was published this week in the October issue of Autism Research and created with collaborators from the University of Toronto. The research participants -- employed individuals, 33 with autism and 34 neurotypical -- were asked to weigh in on hypothetical scenarios involving everything from inefficiencies to inequalities to quality concerns. It's a survey of 67 people. Could have been online even. Nothing I…
Mind you, this is assuming that the sample has been taken in an unbiased manner (nigh impossible in a voluntary survey like this) and that any conclusions you draw are applied only to the population you took the sample from (e.g., if your sample is undergrad psychology students at a particular university, your results apply only to undergrad psychology students at that particular university, not to the general population).
The issue is not the sample size. It's the sampling method. Even if you do a study on 1 billion people, your are liable to get an incorrect result if you don't take the sample correctly.
Of course, the other issue here is that we are claiming something that the study didn't actually cover. The researchers did not look at whether the subjects succumbed to the bystander effect or not: they just looked at how the subjects answered questions. These are two extremely different things! This is bad experiment design.