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Hi All,

I’m just trying to get to grips with the current (3) version of psychopy and online studies. Can anyone confirm whether staircases (and particularly interleaved staircases) are implemented in the current version?

Currently I’m getting this error upon html compilation: “AttributeError: ‘StairHandler’ object has no attribute ‘writeInitCodeJS’”.

Does this mean that builder wont yet compile staircases to html? If that’s the case am I better delving into psychoJS? I’m trying to stick to builder as much as i can as I intend teaching my undergraduates and some faculty to use psychopy for their online studies. Hence trying to concentrate my efforts on a single (easier) platform.

    • And thanks for all your efforts so far, this is looking great! - -

Best wishes,



Yes, staircases aren’t yet in the PsychoJS library so can’t be used in online studies. This first period of work has been focussed mostly on getting the server working and making it as easy as possible to connect from the app. There will be a new wave of PsychoJS development soon though, where we’ll hopefully be adding

  • movies
  • slider (rating) scales
  • staircases
  • polygon
  • better timing