# Online experiments

**URL:** https://discourse.psychopy.org/c/online/14.md

[Latest](https://discourse.psychopy.org/latest.md) · [Categories](https://discourse.psychopy.org/categories.md) · [Tags](https://discourse.psychopy.org/tags.md)

---

## [Older PsychoJS 3.2.4 experiment suddenly stopped initializing – all library imports return 404](https://discourse.psychopy.org/t/older-psychojs-3-2-4-experiment-suddenly-stopped-initializing-all-library-imports-return-404/48309)

<div class="topic-metadata">

**Author:** [@bgrocott](https://discourse.psychopy.org/u/bgrocott)\
**Replies:** 6\
**Last updated:** [October 31, 2026, 10:23am UTC](https://discourse.psychopy.org/t/older-psychojs-3-2-4-experiment-suddenly-stopped-initializing-all-library-imports-return-404/48309 "2026-10-31T10:23:28Z")

</div>

Hello, I have an experiment that has been running successfully on Pavlovia for approximately two years. Around mid-October 2026, it suddenly stopped working. It now remains stuck on the “Initializing experiment” screen …

---

## [Sharing tips for preventing and detecting AI bot participation in surveys and experiments?](https://discourse.psychopy.org/t/sharing-tips-for-preventing-and-detecting-ai-bot-participation-in-surveys-and-experiments/48285)

<div class="topic-metadata">

**Author:** [@JoKeyser](https://discourse.psychopy.org/u/JoKeyser)\
**Replies:** 2\
**Last updated:** [October 30, 2026, 7:48pm UTC](https://discourse.psychopy.org/t/sharing-tips-for-preventing-and-detecting-ai-bot-participation-in-surveys-and-experiments/48285 "2026-10-30T19:48:29Z")

</div>

Hi everyone, our teams are getting worried about LLM/“AI” bots taking part in our online studies, so I would like to start a thread about practical tips to prevent or at least detect that. I hope this is the right place…

---

## [Error 404 on survey start after editing](https://discourse.psychopy.org/t/error-404-on-survey-start-after-editing/48315)

<div class="topic-metadata">

**Author:** [@GeorgeH](https://discourse.psychopy.org/u/GeorgeH)\
**Replies:** 1\
**Last updated:** [October 30, 2026, 3:16pm UTC](https://discourse.psychopy.org/t/error-404-on-survey-start-after-editing/48315 "2026-10-30T15:16:59Z")

</div>

Hello all, I’ve run into a problem where my Pavlovia survey that used to work is now sending back a Error 404 after piloting/ running after I made some edits. Everything looks fine on the surface so I’m a bit stumped. …

---

## [Error: UserEmailManager not Subscriptable](https://discourse.psychopy.org/t/error-useremailmanager-not-subscriptable/48307)

<div class="topic-metadata">

**Author:** [@jrw26vpb](https://discourse.psychopy.org/u/jrw26vpb)\
**Replies:** 2\
**Last updated:** [October 30, 2026, 1:05pm UTC](https://discourse.psychopy.org/t/error-useremailmanager-not-subscriptable/48307 "2026-10-30T13:05:42Z")

</div>

I’ve been told by my lecturer to use PyschoPy v2025 2.4 beta for our work. When I try to add my Pavlovia account to PyschoPy I’m getting the error message: Traceback (most recent call last): File “C:\\Program Files\\Psyc…

---

## [Sync problem on a Mac without Homebrew](https://discourse.psychopy.org/t/sync-problem-on-a-mac-without-homebrew/48009)

<div class="topic-metadata">

**Author:** [@JensBoelte](https://discourse.psychopy.org/u/JensBoelte)\
**Replies:** 8\
**Last updated:** [October 28, 2026, 11:12am UTC](https://discourse.psychopy.org/t/sync-problem-on-a-mac-without-homebrew/48009 "2026-10-28T11:12:56Z")

</div>

OS Mac Tahoe 26.7.1: PsychoPy version (e.g. 2026.2.4 Py 3.11): What are you trying to achieve?: I am trying to sync an experiment with Pavlovia. However the sync-fails with an error message: Traceback (most recent ca…

---

## [Pavlovia sync errors and browser experiments failing, even with a simple experiment, ERR\_EMPTY\_RESPONSE at localhost:12002](https://discourse.psychopy.org/t/pavlovia-sync-errors-and-browser-experiments-failing-even-with-a-simple-experiment-err-empty-response-at-localhost-12002/48266)

<div class="topic-metadata">

**Author:** [@lele](https://discourse.psychopy.org/u/lele)\
**Replies:** 2\
**Last updated:** [October 28, 2026, 10:11am UTC](https://discourse.psychopy.org/t/pavlovia-sync-errors-and-browser-experiments-failing-even-with-a-simple-experiment-err-empty-response-at-localhost-12002/48266 "2026-10-28T10:11:52Z")

</div>

OS (e.g. Win10): Windows 11 PsychoPy version (e.g. 2024.2.4 Py 3.8): PsychoPy 2026.1.0 Standard Standalone Installation? (y/n) If not then what?: Yes, standard standalone installation (as far as I know). URL of experi…

---

## [Sternberg Working Memory Task - Public Online Demo on Pavlovia - Credit Error](https://discourse.psychopy.org/t/sternberg-working-memory-task-public-online-demo-on-pavlovia-credit-error/48284)

<div class="topic-metadata">

**Author:** [@or311](https://discourse.psychopy.org/u/or311)\
**Replies:** 0\
**Last updated:** [October 27, 2026, 2:14pm UTC](https://discourse.psychopy.org/t/sternberg-working-memory-task-public-online-demo-on-pavlovia-credit-error/48284 "2026-10-27T14:14:45Z")

</div>

Hello, I was hoping to use the online demo for the Sternberg Memory Task to do some initial feasibility piloting in a population. However, unlike the other online demos, I receive the following error: Unfortunately we …

---

## [Single line input using range, but no option for end point tethers?](https://discourse.psychopy.org/t/single-line-input-using-range-but-no-option-for-end-point-tethers/48277)

<div class="topic-metadata">

**Author:** [@terronymous-boosh](https://discourse.psychopy.org/u/terronymous-boosh)\
**Replies:** 2\
**Last updated:** [October 27, 2026, 11:38am UTC](https://discourse.psychopy.org/t/single-line-input-using-range-but-no-option-for-end-point-tethers/48277 "2026-10-27T11:38:52Z")

</div>

Hi, We’re trying to create a simple survey for participants to complete without too much hassle, and I’ve been asked to use sliders to input ratings. It’s great that Pavlovia has this already as an option, but it doesn’…

---

## [Run in Browser fails with CORS error loading default.png, Pavlovia Pilot works](https://discourse.psychopy.org/t/run-in-browser-fails-with-cors-error-loading-default-png-pavlovia-pilot-works/48197)

<div class="topic-metadata">

**Author:** [@olga.lazareva](https://discourse.psychopy.org/u/olga.lazareva)\
**Replies:** 5\
**Last updated:** [October 22, 2026, 4:46pm UTC](https://discourse.psychopy.org/t/run-in-browser-fails-with-cors-error-loading-default-png-pavlovia-pilot-works/48197 "2026-10-22T16:46:31Z")

</div>

OS (e.g. Win10): Win 11 PsychoPy version (e.g. 2024.2.4 Py 3.8): PsychoPy Builder 2026.2.2 Standard Standalone Installation? yes URL of experiment: Pavlovia Do you want it to also run locally? yes What are you tryin…

---

## [Pavlovia Shelf Error and No Data Saved](https://discourse.psychopy.org/t/pavlovia-shelf-error-and-no-data-saved/48186)

<div class="topic-metadata">

**Author:** [@annakazatchkova](https://discourse.psychopy.org/u/annakazatchkova)\
**Replies:** 5\
**Last updated:** [October 21, 2026, 4:14pm UTC](https://discourse.psychopy.org/t/pavlovia-shelf-error-and-no-data-saved/48186 "2026-10-21T16:14:03Z")

</div>

I had a participant email me that they experienced an error at the end of my experiment. The TypeError is Failed to fetch. I have no data for this participant in the GitLab repository or when downloading full results. Al…

---

## [Enter Missing CSV participant data across four active Pavlovia experiments – dissertation study](https://discourse.psychopy.org/t/enter-missing-csv-participant-data-across-four-active-pavlovia-experiments-dissertation-study/48185)

<div class="topic-metadata">

**Author:** [@terrence.calistro3](https://discourse.psychopy.org/u/terrence.calistro3)\
**Replies:** 2\
**Last updated:** [October 21, 2026, 11:30am UTC](https://discourse.psychopy.org/t/enter-missing-csv-participant-data-across-four-active-pavlovia-experiments-dissertation-study/48185 "2026-10-21T11:30:32Z")

</div>

Hello Pavlovia/PsychoPy Support Team, I am reaching out regarding a potentially serious data retrieval issue affecting four Pavlovia experiments that are being run simultaneously as separate conditions of an ongoing dis…

---

## [Help: No Pavlovia confirmation email and no resend button](https://discourse.psychopy.org/t/help-no-pavlovia-confirmation-email-and-no-resend-button/48190)

<div class="topic-metadata">

**Author:** [@1474503644](https://discourse.psychopy.org/u/1474503644)\
**Replies:** 0\
**Last updated:** [October 21, 2026, 9:21am UTC](https://discourse.psychopy.org/t/help-no-pavlovia-confirmation-email-and-no-resend-button/48190 "2026-10-21T09:21:39Z")

</div>

Hi! I tried to register a Pavlovia account using my institutional email, but I never received the confirmation email. The login page only shows plain text for “Resend”, with no clickable button to send it again. Has any…

---

## [Is Pavlovia down for maintenance today (Sunday, October 18 2026)?](https://discourse.psychopy.org/t/is-pavlovia-down-for-maintenance-today-sunday-october-18-2026/48156)

<div class="topic-metadata">

**Author:** [@lara112534](https://discourse.psychopy.org/u/lara112534)\
**Replies:** 9\
**Last updated:** [October 20, 2026, 7:23am UTC](https://discourse.psychopy.org/t/is-pavlovia-down-for-maintenance-today-sunday-october-18-2026/48156 "2026-10-20T07:23:33Z")

</div>

Hi everyone, I’m unable to log in to Pavlovia today. Has any maintenance or service outage been announced? Does anyone know how long it is expected to last? Thanks in advance for your help! @apitiot @jon @Becca

---

## [JsPsych 7.1.2 ERR\_NAME\_NOT\_RESOLVED issues](https://discourse.psychopy.org/t/jspsych-7-1-2-err-name-not-resolved-issues/48172)

<div class="topic-metadata">

**Author:** [@sarita-raghunath](https://discourse.psychopy.org/u/sarita-raghunath)\
**Replies:** 2\
**Last updated:** [October 20, 2026, 7:18am UTC](https://discourse.psychopy.org/t/jspsych-7-1-2-err-name-not-resolved-issues/48172 "2026-10-20T07:18:50Z")

</div>

URL of experiment: This is the current code for jspsych plugin loading, which has been working for months: \<script \*src\*="https://pavlovia.org/lib/vendors/jspsych-7.1.2/jspsych.js"\>\</script\> \<script \*src\*="https://p…

---

## [Missing webcam recordings from Pavlovia results](https://discourse.psychopy.org/t/missing-webcam-recordings-from-pavlovia-results/48169)

<div class="topic-metadata">

**Author:** [@yuma1](https://discourse.psychopy.org/u/yuma1)\
**Replies:** 3\
**Last updated:** [October 20, 2026, 7:13am UTC](https://discourse.psychopy.org/t/missing-webcam-recordings-from-pavlovia-results/48169 "2026-10-20T07:13:22Z")

</div>

PsychoPy version: 2026.1.3 URL of experiment: Pavlovia I’m running an online experiment on Pavlovia that uses webcam components to record participants. Four participants completed my experiment on October 16-17, but w…

---

## [Cannot receive confirmation email to register for Pavlovia](https://discourse.psychopy.org/t/cannot-receive-confirmation-email-to-register-for-pavlovia/48174)

<div class="topic-metadata">

**Author:** [@taeddy515](https://discourse.psychopy.org/u/taeddy515)\
**Replies:** 1\
**Last updated:** [October 19, 2026, 9:33pm UTC](https://discourse.psychopy.org/t/cannot-receive-confirmation-email-to-register-for-pavlovia/48174 "2026-10-19T21:33:33Z")

</div>

Hi! I tried to register a new Pavlovia account using my two of my institutional emails, but neither managed to receive the confirmation email to proceed with registration. Does anyone have any intel on this?

---

## [Experiment suddenly deleted but still visible: can't download data](https://discourse.psychopy.org/t/experiment-suddenly-deleted-but-still-visible-cant-download-data/48164)

<div class="topic-metadata">

**Author:** [@Wynn](https://discourse.psychopy.org/u/Wynn)\
**Replies:** 3\
**Last updated:** [October 19, 2026, 9:25am UTC](https://discourse.psychopy.org/t/experiment-suddenly-deleted-but-still-visible-cant-download-data/48164 "2026-10-19T09:25:03Z")

</div>

PsychoPy version: 2024.2.4 URL of experiment: julvwyns/MathIMPACT Hi! I recently ran a testrun of my experiment and everything seemed perfectly in order and all data was succesfully saved. However, when I ran the exper…

---

## [Missing credits](https://discourse.psychopy.org/t/missing-credits/10541)

<div class="topic-metadata">

**Author:** [@Faye](https://discourse.psychopy.org/u/Faye)\
**Replies:** 15\
**Last updated:** [October 18, 2026, 4:39pm UTC](https://discourse.psychopy.org/t/missing-credits/10541 "2026-10-18T16:39:27Z")

</div>

Hi, I’m not sure who to contact. I have a problem about “lost” credits. I bought 50 credits today and assigned it to a new experiment. Then I noticed that the experiment constantly produces error messages. I couldn’t f…

---

## [Empty repository for old project "Semantic-thought-probing", possibly not migrated to the new GitLab server](https://discourse.psychopy.org/t/empty-repository-for-old-project-semantic-thought-probing-possibly-not-migrated-to-the-new-gitlab-server/48091)

<div class="topic-metadata">

**Author:** [@Nicobruno92](https://discourse.psychopy.org/u/Nicobruno92)\
**Replies:** 2\
**Last updated:** [October 16, 2026, 1:59pm UTC](https://discourse.psychopy.org/t/empty-repository-for-old-project-semantic-thought-probing-possibly-not-migrated-to-the-new-gitlab-server/48091 "2026-10-16T13:59:01Z")

</div>

Hi, I’m trying to resume an old experiment, but my project “Semantic-thought-probing” on Pavlovia now appears empty. The project page still exists under my account, but it shows “The repository for this project does not…

---

## [Pavlovia Error - Data Not Saving When Piloting or Into Github Repository on Chrome AND Microsoft Edge](https://discourse.psychopy.org/t/pavlovia-error-data-not-saving-when-piloting-or-into-github-repository-on-chrome-and-microsoft-edge/48079)

<div class="topic-metadata">

**Author:** [@annakazatchkova](https://discourse.psychopy.org/u/annakazatchkova)\
**Replies:** 16\
**Last updated:** [October 16, 2026, 12:53pm UTC](https://discourse.psychopy.org/t/pavlovia-error-data-not-saving-when-piloting-or-into-github-repository-on-chrome-and-microsoft-edge/48079 "2026-10-16T12:53:15Z")

</div>

If this template helps then use it. If not then just delete and start from scratch. OS Win11 PsychoPy version 2025.1.1 Pavlovia Error - Data Not Saving When Piloting or Into Github Repository on Chrome AND Microsoft …

---

## [Participant's data missing after aborted session](https://discourse.psychopy.org/t/participants-data-missing-after-aborted-session/48125)

<div class="topic-metadata">

**Author:** [@leoneill\_Jeff](https://discourse.psychopy.org/u/leoneill_Jeff)\
**Replies:** 1\
**Last updated:** [October 12, 2026, 9:43pm UTC](https://discourse.psychopy.org/t/participants-data-missing-after-aborted-session/48125 "2026-10-12T21:43:25Z")

</div>

OS (e.g. Win10): macOS-27.0.1-x86\_64-i386-64bit PsychoPy version: PsychoPy 2025.2.4 Standard Standalone Installation? (y/n) Yes URL of experiment: vice\_words\_psychopy\_survey \[PsychoPy\] Recruitment: Prolific Saving …

---

## ['Previous' button showing when it is not suppose to](https://discourse.psychopy.org/t/previous-button-showing-when-it-is-not-suppose-to/48100)

<div class="topic-metadata">

**Author:** [@R\_Huynh](https://discourse.psychopy.org/u/R_Huynh)\
**Replies:** 1\
**Last updated:** [October 8, 2026, 10:24pm UTC](https://discourse.psychopy.org/t/previous-button-showing-when-it-is-not-suppose-to/48100 "2026-10-08T22:24:53Z")

</div>

Hello, I am having some issues running pertaining to the “show ‘previous’ button” under general navigation. The survey does not want the participant to be able to go back once a page has been completed. Even though I ha…

---

## [Survey Logic Not Working in Preview/Run](https://discourse.psychopy.org/t/survey-logic-not-working-in-preview-run/48014)

<div class="topic-metadata">

**Author:** [@R\_Huynh](https://discourse.psychopy.org/u/R_Huynh)\
**Replies:** 6\
**Last updated:** [October 8, 2026, 4:18pm UTC](https://discourse.psychopy.org/t/survey-logic-not-working-in-preview-run/48014 "2026-10-08T16:18:26Z")

</div>

Hello, I’m having trouble with the logic function in our study. The issue primarily affects the consent form leading into demographic filtering. Specifically, I am trying to filter participants who consent to participat…

---

## [Pavlovia account has no GitLab namespace and PsychoPy Sync fails](https://discourse.psychopy.org/t/pavlovia-account-has-no-gitlab-namespace-and-psychopy-sync-fails/48064)

<div class="topic-metadata">

**Author:** [@Paloma\_Zeng](https://discourse.psychopy.org/u/Paloma_Zeng)\
**Replies:** 1\
**Last updated:** [October 5, 2026, 1:25pm UTC](https://discourse.psychopy.org/t/pavlovia-account-has-no-gitlab-namespace-and-psychopy-sync-fails/48064 "2026-10-05T13:25:56Z")

</div>

OS (macOS 10.15.7): PsychoPy version (PsychoPy 2026.1.3): Standard Standalone Installation? (y) Do you want it to also run online? (y) What are you trying to achieve?: I am trying to synchronize my PsychoPy experimen…

---

## [Audio files not working intermittently in Pavlovia](https://discourse.psychopy.org/t/audio-files-not-working-intermittently-in-pavlovia/47913)

<div class="topic-metadata">

**Author:** [@Ben\_Trayford](https://discourse.psychopy.org/u/Ben_Trayford)\
**Replies:** 3\
**Last updated:** [October 5, 2026, 8:05am UTC](https://discourse.psychopy.org/t/audio-files-not-working-intermittently-in-pavlovia/47913 "2026-10-05T08:05:12Z")

</div>

My experiment is running on Pavlovia, except for the audio stimuli, but only for some participants. When each word stimulus is presented, there is supposed to be an audio stimulus (the word spoken) that plays with it. Th…

---

## [Integrating pavlovia experiment into Qualtrics](https://discourse.psychopy.org/t/integrating-pavlovia-experiment-into-qualtrics/47968)

<div class="topic-metadata">

**Author:** [@Selen\_Divanlioglu](https://discourse.psychopy.org/u/Selen_Divanlioglu)\
**Replies:** 3\
**Last updated:** [September 29, 2026, 4:57pm UTC](https://discourse.psychopy.org/t/integrating-pavlovia-experiment-into-qualtrics/47968 "2026-09-29T16:57:01Z")

</div>

I want to redirect my participants on Qualtrics, to a Pavlovia survey, and then back to the Qualtrics. I want there to be a consistent participantID that automatically transfers across sites without needing participants …

---

## [GitLab permissions/visibility issue with only one of several Pavlovia experiments](https://discourse.psychopy.org/t/gitlab-permissions-visibility-issue-with-only-one-of-several-pavlovia-experiments/47979)

<div class="topic-metadata">

**Author:** [@Ry\_Batten](https://discourse.psychopy.org/u/Ry_Batten)\
**Replies:** 1\
**Last updated:** [September 27, 2026, 9:21am UTC](https://discourse.psychopy.org/t/gitlab-permissions-visibility-issue-with-only-one-of-several-pavlovia-experiments/47979 "2026-09-27T09:21:55Z")

</div>

I have a permissions issue with one of my experiments that is preventing participants from accessing it. My username is Ry\_Batten, and the affected study is TONE\_NONER\_1, hosted at Sign in · GitLab The issue is: The s…

---

## [Experiments not concluding correctly at end / 97% "abort" rate](https://discourse.psychopy.org/t/experiments-not-concluding-correctly-at-end-97-abort-rate/47939)

<div class="topic-metadata">

**Author:** [@Ry\_Batten](https://discourse.psychopy.org/u/Ry_Batten)\
**Replies:** 4\
**Last updated:** [September 27, 2026, 12:17am UTC](https://discourse.psychopy.org/t/experiments-not-concluding-correctly-at-end-97-abort-rate/47939 "2026-09-27T00:17:28Z")

</div>

OS (e.g. Win11): PsychoPy version (e.g. 2026.1.1 Py 3.13): Standard Standalone Installation? (y) Do you want it to also run locally? (y) What are you trying to achieve?: The experiment is not terminating correctly, a…

---

## [Cannot edit any file in my own project](https://discourse.psychopy.org/t/cannot-edit-any-file-in-my-own-project/47923)

<div class="topic-metadata">

**Author:** [@pankeying](https://discourse.psychopy.org/u/pankeying)\
**Replies:** 4\
**Last updated:** [September 22, 2026, 1:10pm UTC](https://discourse.psychopy.org/t/cannot-edit-any-file-in-my-own-project/47923 "2026-09-22T13:10:51Z")

</div>

Hi everyone, I’m the Owner of a Pavlovia project, but since yesterday I cannot edit any file in it. Every write operation fails, including the web editor. Account: @Emma\_Pan What I’ve already checked: I am logged in …

---

## [Pavlovia Dashboard error when authenticating the user](https://discourse.psychopy.org/t/pavlovia-dashboard-error-when-authenticating-the-user/47901)

<div class="topic-metadata">

**Author:** [@tobias](https://discourse.psychopy.org/u/tobias)\
**Replies:** 8\
**Last updated:** [September 19, 2026, 1:59pm UTC](https://discourse.psychopy.org/t/pavlovia-dashboard-error-when-authenticating-the-user/47901 "2026-09-19T13:59:46Z")

</div>

Hey everyone, I signed up for pavlovia yesterday to run my experiment online. Logging in works. But when I move to the dashboard, I get the following error: When I try to log into pavlovia in psychopy, I get the fo…

[Next page](https://discourse.psychopy.org/c/online/14.md?page=1)