Hi, I’m using Psychopy 3.03 standalone on windows10. I would like to write a feedback routine which tells the participant, whether they responded correctly in a 2back-experiment (different positions are shown sequentially and one should hit space if the position is the same as two pictures before)…

I already realized that I have to change my “corr” column in the excel file to empty instead of 0 und to ‘space’ instead of 1. Still I have problems programming the feedback routine. Thanks for any help.

Search this forum for “ n back task” and you’ll find a number of threads that should help. eg [image] Building a n-back test Builder Hi. I am trying to design n-back test using builder view. I read the previous topics related to n-back and it was somehow unclear. I crea…

Thank you @Michael , I read the threads you mentioned. My main problem is the programming in python. I don’t have any experience with that. I tried something like this: [grafik] Thank you for any programming help!

[image] fragmag: I tried something like this: I’m left wondering why you didn’t try the code as suggested in the posted link (and related threads), instead of the code above (which simply won’t scale for anything other than a single trial). If you look through that thread, you’ll see that so…

Hello Michael, as I understand the thread you mention is about coding what the correct response ist (y/n if a 2-back occured or not) and about feedback in a 1-back experiment. I don’t need code for the correct responce as I have it in my trials file (sequential presentation). I just don’t know how…

OK, yes, that code is for the general case where stimuli are randomised and so the n-back values need to be calculated. If you have sequential conditions and your own “correct” variable, then your problem is indeed simpler. Part of the reason why your code above is failing is that you are referring…

Hello Michael, I tried this code now and I get a syntax error. if key_resp_4.keys == '' and corr == 'space' msg = 'Das wäre ein Treffer gewesen!' if key_resp_4.keys == 'space' and corr == 'space' msg = 'Richtig! Die vorletzte Position war gleich.' if key_resp_4.keys == 'space' and corr == …

Please always include the full text of the error message, but in this case I think the issue is likely that you have simply forgotten the : at the end of each if and else condition.

Hi, I’m getting a feedback now (although not specific enough), but it’s always delayed by one trial i.e. if I make a mistake it gets reported one trial later, at the wrong time. That doesn’t make sense to me as I collect the information at the beginning of the feedback routine… AG-Test.psyexp (73.1 …

Any help within the next two hours much appreciated, I’m testing tomorrow :grimacing:

Feedback Routine in 2back experiment

Coding

Michael February 8, 2019, 10:50am 3

Search this forum for “ n back task” and you’ll find a number of threads that should help.

Topic		Replies	Views
How to build a 2-back task with feedback? Builder	4	1126	July 4, 2021
The feedback of every trial is always “Wrong!” Builder feedback , n-back	39	1827	July 11, 2021
Building a n-back test Builder	39	9548	August 20, 2020
Error giving feedback after a trial Builder	4	2008	March 22, 2021
Delayed feedback Coding	0	409	April 3, 2019

Feedback Routine in 2back experiment

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