We had 3 predictions in this paper.
First, people’s behaviour might be delayed. If we looked at how people moved, and which circle they tended to touch, these measures would reflect the box position some time in the past. The sine waves fit to people’s behaviour would be behind the sine wave of the rotating box.
Second, people’s behaviour might be initially delayed, but they would use the little bit of extra time while moving their arm to update their predictions.
Third, people might just be really good at predicting how likely the left and the right circles would fill in. This suggests that people know exactly how long it takes for them to start moving after the beep, and are behaving as if the box was that far ahead of where it actually was. They are effectively living in the future. In this case, the sine waves fit to people’s behaviour would exactly match the sine wave of the rotating box.
Below are what the sine waves for reach area and accuracy would look like under each of these predictions.