I am currently trying to program an experiment with Coder. I would like to add a global key to end the trial if the participant presses a specific key. My trials consist of visual stimuli that get updated at every screen refresh, their autoDraw state is set to True at the beginning of the trial and to False at the end.
To add the global key, I do the following, which works fine (i.e., the print statement works correctly)
finished = False def myfunc(finished): finished = True print('key was pressed', finished) event.globalKeys.add(key='b', func=myfunc, func_args= [finished])
However, my trials are built as below:
for trial in trials: while (finished == False) : print(finished) # Here goes the content of my trial # condition to end the while loop if condition_to_break_while_loop: finished = True
My problem seems to be that my setting
finished = True through the global event key does not seem to have effect within the while loop. While in my output I get the correct statement printed “key was pressed, True” after the b key was pressed, the
print(finished) statement within the loop always returns False, until the condition_to_break_while_loop is met and the trial finishes.
Any suggestion on how to get the global key event to work correctly in this context, or other strategies to achieve my goal?
Thanks a lot for any input!