If you saw an indisposed man stumble into an oncoming train and collapse onto the platform, would you do something? If you’re among the nearly 50 people who passed by a similar accident in a Montreal train station last winter, chances are, probably not. Most of us consider ourselves to be caring people who are willing to help others in need. So why is it that when tragedy strikes in the middle of a crowd, no one seems to do much of anything? The reason is a psychological phenomenon known as the bystander effect. To learn more, click here.