The example experiment contained the following lines:
oopsButton = 0 0 0 0 "" ""
This means that that experiment did not have an oops button. To add an oops button in the lower left corner of the screen, you do something like
oopsButton = 0.05 0.2 0.05 0.15 "oops" ""
If you supply a right edge (here 0.2) that is greater than the left edge (here 0.05), Praat will know that you want to show an oops button.
If you include an oops button, it will become visible to the participant for every stimulus except the first, and it will also be visible on the pause (break) screens and on the final screen.
If the participant clicks the oops button, Praat will forget everything the participant did with the current stimulus and the previous stimulus. The experiment will continue with playing the previous stimulus again and waiting for the participant's choice.
© ppgb, December 5, 2005