Hi @ClementineG, I proposed a new rating scale stimulus (that also happens to support vertical scales) for the inclusion in PsychoPy:
https://github.com/psychopy/psychopy/pull/1279
However, some issues with the current implementation need a bit more discussion and work, but I’m currently extremely busy with my PhD studies, so didn’t really have time to take action so far. Still, the existing code is functional. Only supports input via mouse, though, and does not display a marker until the participant clicks on the scale. It doesn’t have an accept box, either. If you need help getting the scale to work, let me know!
Cheers,
Richard