Get duration of a keypress from builder (python)

Builder
1

hello,

not sure if there is a weird thing going on, but i’m just trying to find the duration of a keypress from an in-person experiment created using the builder.

a keyboard is made in the routine (called response). the keyPress class is meant to have .name .rt .tDown and .duration methods to calculate (and return) these things, including the duration a button was pressed. I want to store this duration (interval reproduction task), but can’t access it at all. I can’t index it using the response.duration method which normally works when getting RTs. I thought this might be because the compiled code just doesnt store it, but even when i add in code to store this, it stores None

for example, if i do this in my code block:

print('first rt: ' + str(_response_allKeys[0].rt))
print('first key: ' + str(_response_allKeys[0].name))
print('first dur: ' + str(_response_allKeys[0].duration))

if len(response.keys) > 0:
    firstkey = _response_allKeys[0]
    intervals.addData('response.duration', firstkey.duration)
elif len(response.keys) == 0:
    intervals.addData('response.duration', -999)

if i do this, the rt and name of they key that were pressed will get printed, but duration comes out as None

Is there a way of getting the duration of a keypress from within the builder (i.e. stored as part of the keyPress class output from the builder compiled code calling keyboard.getKeys() or is that not possible?

Thanks!

2

looks like this doesn’t work unless waitRelease=True which the builder components don’t allow you to set (at least in 2022.2.4) – which means you need to manually edit the python compiled code from the builder, and also some trivial code to add the duration to the output csv file.