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N-back task

edited July 21 in OpenSesame

Hi!

Is there an openly available version of the N-back task in OpenSesame online? I've run across the N-back with lures (https://github.com/berrygrant/OpenSesame), but I was wondering if there was one without lures.

I'd also be very grateful if anyone would like to share their N-back task with me :-)

Thanks in advance!

Comments

  • Hi Paula,

    I am not aware of a complete version, but I wouldn't be surprised if you stumble over on if you browse the forum or the web (e.g. OSF?). For example, here is a thread that had an (almost) working n-back task: https://forum.cogsci.nl/discussion/4389/n-back-task-problem There will probably be more.

    Hope this helps.

    Eduard

    Buy Me A Coffee

  • edited July 22

    Thank you for the reply!

    I am trying to create my own task relying on multiple examples and also your code in the linked thread. I'm happy to share it here once it works.

    I also want to log the 'false alarms', that is, when participants press the response button even if they should not. How can I do that?

    For now, I have a fixation of duration 0 after every stimulus. The challenge is counting a 'timeout' as a 'correct' answer... Edited: found a thread on this issue: https://forum.cogsci.nl/discussion/875/solved-set-timeout-as-correct-answer-on-a-go-nogo-task

    Do you have any thoughts on how to do that?

  • I also want to log the 'false alarms', that is, when participants press the response button even if they should not. How can I do that?

    You could code the correct_response per trial (None for nogos, and the response key for gos), and the actual response (var.response) per trial. If there is no response, it will be coded as None , so then it is as easy as comparing the correct_response and response variable and see whether they are not the same and the correct_response is None , et voila, you have your false alarms.

    Buy Me A Coffee

  • edited July 22

    I ran into a different challenge: how can I verify that (x-3)th letter in the first block is not the same as the xth of the second block?

    For example, for a 3 back task:

    if block 1 contains B, M, N, V, C, in this order, and

    if block 2 contains H, J, K, C, F in this order,

    then the C in block 1 and the C in block 2 are the same letter, but the programming (in the other thread) does not account for this...

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