The same article showed up on my F-book feed. My original response is buried somewhere in the archives, but it was along these lines:
The phenomenon is the same one as "Diffusion of Responsibility" where no one wants to be the first to break ranks and act. Everybody assumes "the other guy" will deal with it. There's the aforementioned Kitty Genovese murder, where nobody wanted to step up and was content to the the "other guy(s)" handle it. Also, I have personally witnessed this in a situation where there was no doubt about the correct course of action, but only very few acted.
It was a fire alarm, that went off in the middle of the afternoon, at a hotel. I did the whole shoes, coat, briefcase, out the door, down the hall, down three flights of stairs, and out the emergency exit. Total time from when the alarm when off to leaving my room was probably about 90 seconds. Out of the hundred or so guests that were on my floor, only 3 of us headed for the exit. Everybody else was standing in their doorways asking if they should do something.
By the time the fire department shut off the alarm, 20 minutes later, all of the hotel staff had evacuated. But, only about 30 guests were standing in the parking lot. There were probably 300 people in the hotel at that time.
Now, I don't know if there is a more clearcut course of action, then when a fire alarm goes off in your hotel, but most of the guests failed to act.
I'm not going to say I acted flawlessly as I headed for the far stairwell instead of the one near my room. As I noted in previous posts, you get dumb when stressed.
What was interesting to note was that most of the hotel was filled with attendies for a Baptist convention. So, the makeup of the guests was unually homogenous (religious, and retires and families with multiple teenyboppers). I can't say how a more diverse group would have reacted, but "group think" was definitely a factor in this case.
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Hope for the best and prepare for the worst.
The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane