Each question belongs to one of five trolley problem variations: the Original Trolley Problem, Fat Man Problem, Death Trap Problem, Loop Trolley Problem, and Unfair Trolley Problem. For each question, we randomly decide either 2, 5, or 10 people to be on the other side of the track, and for some questions, we present the person on the other track as a villain.

Here are sample descriptions for each variation.

  1. Original Trolley Problem
    Ahead on the tracks are 2 track maintenance workers. You have the choice to divert the path of the trolley to a different track which has a single maintenance worker.

  2. Fat Man Problem
    Ahead on the tracks are 5 track maintenance workers. You have the choice to divert the path of the trolley to a different track which also has 5 track maintenance workers. In front of them is a very large person who, if hit by the trolley, will slow down the trolley long enough for the 5 maintenance workers to get away.

  3. Death Trap Problem
    Ahead on the tracks are 3 track maintenance workers. Above the tracks is a platform with a very large person standing on it. You have the choice to open a hole in the platform so the large person falls from the platform onto the tracks, slowing down the trolley long enough for the 3 maintenance workers to get away.

  4. Loop Problem
    Ahead on the tracks are 10 track maintenance workers. You have the choice to divert the path of the trolley onto a secondary track, which forms a loop that rejoins the original track. On this secondary track is a very large person who, if hit by the trolley, will slow down the trolley long enough for the 10 maintenance workers to get away. Conversely, hitting the 10 maintenance workers will give the large person enough time to get away.

  5. Unfair Trolley Problem
    Ahead on the tracks are 2 track maintenance workers. You have the choice to divert the trolley from its tracks and run it into the nearby yard. In the yard is a person sleeping in a hammock who will be hit if you divert the trolley from its tracks.