4 ms·

If you have adjusted the seat height yourself you know that the seat tube slides within the frame. So the first/left-most bicycle is wrong because the seat tube

If you have adjusted the seat height yourself you know that the seat tube slides within the frame. So the first/left-most bicycle is wrong because the seat tube is vertical and the frame tubes are at angles. Then you scan the four diagrams to find the one where the seat tube and one of the frame tubes form a straight line. None of them. At this point you give up and just answer randomly. The experimenter claims "People made lots of fundamental mistakes." but I think the experimenter made a fundamental mistake and his subjects lost interest in the experiment.

Frompo 10y ago
Well, if you read the description, the first task actually includes tacking on the bits of frame you think are missing. So with all the subjects rising to your level of pedantry crowding out the other people, the drawing task should have much lower error rates than the multiple choice test. However, it seems many people got so outraged by the wrong slant on the seat tube in the stick figure drawing they didn't draw a frame at all! (but did draw the chain and pedals in the correct place, presumably because the insult of the seat tube did not taint all of the bike)