Pavlovia down for maintenance

Just to confirm, as stated in the email sent a few days ago, will be offline for maintenance for much of tomorrow (Sunday 29th) while we migrate it to a more substantial hardware.

Apologies for the inconvenience, but you should not attempt to run further participants until the system goes back online (roughly tomorrow afternoon, assuming testing goes well).

We’ll announce back here when the migration and testing are complete.

Don’t worry, we’ll ensure your data are maintained in the transition, and kept secure throughout

best wishes,

We’re making progress rapidly. A few more tests to do but the migration seems to have gone smoothly. We’ll be with you in due course, but do hold off trying to sync experiments etc for now as it won’t work

Pavlovia is back online. The migration is complete and all appears to have worked fine.

You can run your studies again, but do use caution in the first instance to make sure it’s behaving as you expect.


Thank you for the update. Now this issue (which was resolved a few days ago) is happening again: Fail to pass url parameters. Basically, the URL is not being saved in the CSV file name or in the column “participant” but rather it is saving as a column name and nowhere else.

Hello @hrb,

The database restoration did affect the absolute latest changes indeed. With my apologies for the mishap, you should be good to go now.


In order to set the duration of an image as a variable, I extracted the duration of each item, included it within the spreadsheet as a variable: $duration, and input that variable name into the duration field within the image. It works well on builder offline, but it doesn’t work online.

The error message as following:

Unfortunately we encountered the following error:

TypeError: Assignment to read-only properties is not allowed in strict modeTry to run the experiment again. If the error persists, contact the experiment designer.

So, how can I deal with this problem?

Any help is greatly appreciated!

Best wishes!

发送自 Windows 10 版邮件应用


Unfortunately, one of my experiments which was working fine before this weekend doesn’t work anymore. The pavlovia plugin for jspsych fails to load, showing this error message:

[jspsych-pavlovia plugin 3.0.0] Error

  • when configuring the plugin
  • ReferenceError: $ is not defined

the experiment:

Any idea why, and how to solve that?



Thank you very much for fixing this so quickly!