Key Release crashes experiment

MattHudson

screenshot.jpg

Hi all,

I am new to Open Sesame, and I have been building an experiment with the GUI. I have a problem in that I want to have a keyrelease toward the end of the trial, and Opensesame crashes. My trial sequence is as follows (please also see attached screenshot):

·        hold_spacebar: A sketchpad with the instruction to hold the spacebar

·        new_keyboard_response: records space keypress to start the next part of the trial

·        new_sampler: plays an audiofile, duration 0

·        audio: sketchpad that displays image whilst audio is playing

·        frame 1 – 5: five sketchpads showing different images (83ms each)

·        test: sketchpad of a test image.

·        release_spacebar: participants should release the spacebar

·        new_mouse_response: the cursor is shown, and participants respond by moving the mouse to a position on the ‘test’ sketchpad.

·        logger

The aim is for participants to hold the spacebar down at the start of the trial, and keep it pressed until the test image is shown, after which they release the spacebar, and respond with the mouse. The timing of the spacebar press, release, and mouse response should also be recorded.

However, OpenSesame returns an error when the release_spacebar item is encountered:

 

File "C:\Program Files (x86)\OpenSesame\Lib\site-packages\openexp\_keyboard\keyboard.py", line 227, in get_key_release

   raise NotImplementedError()

 

If the setting is set to keypress, then it is ok.

Any help to resolve this problem would be much appreciated.

Thank you in advance,

MH

 

eduard

Hi Matt,

Which backend are you using? Keyrelease is only implemented in Expyriment and Legacy. If you use the Psycho backend, you can't use this functionality. See here:

https://osdoc.cogsci.nl/3.3/manual/python/keyboard/#function-keyboardget_key_releaseresp_args

Eduard

MattHudson

Hi,

thanks for your quick response! I changed the backend, and now it is working.

Thanks again,

Matt