Figure 1 from Smith, Madan, and Weinstein, E-xcellence in Teaching (in press)
Figure 1. The bystander effect explains one dimension that determines whether a person will help a victim in need. When more people are around, people are less likely to help, thought to be because of a diffusion of responsibility. This figure provides a visual sketch of the bystander effect, where the person by himself is willing to help but in a crowd is not willing to help in the same situation. Individual images were obtained from Pixabay.com, and are free to reproduce.