Error while trying to launch experiment online

Online experiments
1

I have the following error appear preventing my experiment from running on Pavlovia-

  • when converting a position to pixel units
  • unknown position units: cm
    Can anybody recommend any solutions?
    I have tried changing the units and resetting the preferred units on Psychopy and there seems to be no change.
2

Ctrl Shift R to flush the cache and run the latest version of the experiment (in height, norm or pixel units).

1 Like
3

Thanks! But are you aware of any solutions if I’d want to keep it in cm/ deg?

4

If you want fixed sizes in cm online then I recommend that you add my screen scale routine (see PsychoPy Online Demos).

Degrees online requires a more sophisticated technique (e.g. using the blind spot) or trigonometry to convert to cm if you can persuade the participant to pick a standard distance or tell you how far they are from the screen.

1 Like
5

Thanks so much! I managed to scale it back to the size I needed and run it with height. I really appreciate your help.

6

Me too! Help please?

7

Are you trying to use cm online?

8

No. I know that can cause this error, which is why I changed all instances of cm to ‘from experimental settings’.

9

If you aren’t getting the error reported in this thread then I would recommend that you search the forum for the error message you are getting and see if that helps, or post there, or start a new thread with the details of your error and attempted solutions.

10

I am getting that error! that’s the point! Never mind, I’ll try and figure it out myself.