# \#n-back

**URL:** https://discourse.psychopy.org/tag/n-back/69.md

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## [Randomized n-back with fixed number of targets not displaying stimuli (workshop demo missing info)](https://discourse.psychopy.org/t/randomized-n-back-with-fixed-number-of-targets-not-displaying-stimuli-workshop-demo-missing-info/29856)

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**Author:** [@Chelsie\_Hart](https://discourse.psychopy.org/u/Chelsie_Hart)\
**Replies:** 4\
**Last updated:** [August 11, 2023, 6:18pm UTC](https://discourse.psychopy.org/t/randomized-n-back-with-fixed-number-of-targets-not-displaying-stimuli-workshop-demo-missing-info/29856 "2023-08-11T18:18:51Z")

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Hello all, I’ve been working off of this tutorial to create an n-back with randomized stimuli in the PsychoPy builder with custom code; but this example doesn’t include all of the script needed. Essentially, it is sup…

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## [Button click N-back task](https://discourse.psychopy.org/t/button-click-n-back-task/33662)

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**Author:** [@Flora0105](https://discourse.psychopy.org/u/Flora0105)\
**Replies:** 0\
**Last updated:** [March 6, 2023, 11:01am UTC](https://discourse.psychopy.org/t/button-click-n-back-task/33662 "2023-03-06T11:01:00Z")

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What are you trying to achieve?: I am trying to do a 1-back task where participants need to click the button ‘same’ or ‘not same’ whether the letter presented before was identical to the current letter. I included the b…

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## [Move forward/backward based on Block accuracy (n-back task)](https://discourse.psychopy.org/t/move-forward-backward-based-on-block-accuracy-n-back-task/25681)

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**Author:** [@PILAR\_FM](https://discourse.psychopy.org/u/PILAR_FM)\
**Replies:** 2\
**Last updated:** [March 6, 2023, 9:38am UTC](https://discourse.psychopy.org/t/move-forward-backward-based-on-block-accuracy-n-back-task/25681 "2023-03-06T09:38:49Z")

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Hi everyone, I’m working on an adaptative n-back task for working-memory training. In this task, participants have to press the keyboard every time a letter matches the one presented n trials ago. Participants start com…

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## ["IndexError: list index out of range" when trying to read values from an appended list](https://discourse.psychopy.org/t/indexerror-list-index-out-of-range-when-trying-to-read-values-from-an-appended-list/30370)

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**Author:** [@Chia-Chuan\_Yu](https://discourse.psychopy.org/u/Chia-Chuan_Yu)\
**Replies:** 1\
**Last updated:** [August 13, 2022, 7:31pm UTC](https://discourse.psychopy.org/t/indexerror-list-index-out-of-range-when-trying-to-read-values-from-an-appended-list/30370 "2022-08-13T19:31:05Z")

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OS: macOS Big Sur 11.5.2 Psychopy standalone version: 2022.2.2 Hi, I’m adapting an n-back task published by Rebecca Hirst on this site. My goal is to include three different conditions in this task (i.e., 0-back, 1-ba…

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## [The feedback of every trial is always “Wrong!”](https://discourse.psychopy.org/t/the-feedback-of-every-trial-is-always-wrong/23887)

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**Author:** [@JX.Long](https://discourse.psychopy.org/u/JX.Long)\
**Replies:** 39\
**Last updated:** [July 11, 2021, 8:35am UTC](https://discourse.psychopy.org/t/the-feedback-of-every-trial-is-always-wrong/23887 "2021-07-11T08:35:59Z")

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OS: win10 PsychoPy version: 2021.1.4 Hi everyone, I am conducting a basic two-back task with feedback messges. Now I am facing a problem that the feedback of every trial is always “Wrong!”. I have no idea what went w…

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## [N-back task: present stimuli on x% of trials](https://discourse.psychopy.org/t/n-back-task-present-stimuli-on-x-of-trials/4995)

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**Author:** [@ethayer2](https://discourse.psychopy.org/u/ethayer2)\
**Replies:** 0\
**Last updated:** [August 3, 2018, 5:00pm UTC](https://discourse.psychopy.org/t/n-back-task-present-stimuli-on-x-of-trials/4995 "2018-08-03T17:00:09Z")

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macOS 10.13.4 PsychoPy v1.90.2 Standard Standalone Goal: n-back task (2-back) with 8/48, or 16.67%, targets (2-back) and 40/48, or 83.33%, foils (other) Current status: n-back task with the text, keyboard, and code c…

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## [Playing randomised audio files through independently randomised trial loops](https://discourse.psychopy.org/t/playing-randomised-audio-files-through-independently-randomised-trial-loops/3768)

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**Author:** [@scholefj](https://discourse.psychopy.org/u/scholefj)\
**Replies:** 17\
**Last updated:** [January 28, 2018, 9:17pm UTC](https://discourse.psychopy.org/t/playing-randomised-audio-files-through-independently-randomised-trial-loops/3768 "2018-01-28T21:17:31Z")

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Hi there Sorry in advance for the lengthy post, I’m just trying to avoid any ambiguity so any readers can get right down to the question at hand. I’m in the process of constructing an N-back task, and am attempting to …

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## [Creating an n-back task in builder view](https://discourse.psychopy.org/t/creating-an-n-back-task-in-builder-view/2000)

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**Author:** [@kod25](https://discourse.psychopy.org/u/kod25)\
**Replies:** 26\
**Last updated:** [December 15, 2017, 2:23pm UTC](https://discourse.psychopy.org/t/creating-an-n-back-task-in-builder-view/2000 "2017-12-15T14:23:07Z")

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Hello everyone - I am new to Psychopy, and was wondering if anyone would be able to give me some advice on how to create an n-back task with pictures in builder view on PsychoPy version 1.84.2. I’m looking to create a 2…