Bystander Effect

The Street by Baltus

Here is a famous painting by Baltus who is French, 1908-2001 (it is available to see at MoMA in NY). Although at first glance it looks like just a beautiful painting, there is something wrong to happen in the painting. On the left side, the man is doing sexual aggression to the girl wearing a red cloth, but none of the people seem to notice it (or I guess they pretend not to).

This is a good example for the bystander effect (the large number of people witnessing the tragedies militated against anyone's helping). The reason that it occurs is that the people assume as the reasonableness and appropriateness of not helping by the other people do not help. In the above case, if we do not know what the man is doing, we may assume that is appropriate or even may not notice the weirdness.