Pavlovia version of interleaved staircases is only selecting the first staircase

Online experiments
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URL of experiment: InProgress [PsychoPy]

Description of the problem: Hi! I’ve found this forum to be super useful - thanks to the community.

My problem is that I have an interleaved Quest staircase that only runs the first condition on Pavlovia. It runs the desired number of reps (nReps) for that staircase and then terminates gracefully. Offline, it randomly selects between the 4 staircases in the Conditions file and runs nReps for each of them, as intended. I have changed minVal and maxVal to range, as indicated in the documentation (Using a Staircase — PsychoPy v2023.2.3).

Does anyone have any insight as to why only the first staircase would be run online? Are there other examples of interleaved staircases on Pavlovia that I can compare it to? I am running QUEST stair type, switch method ‘random’, loop type ‘interleaved staircases’, ‘istrials’ is selected.

Thanks! I’ll post back if I am able to solve it myself. Otherwise I’ll just run the 4 staircases sequentially, but that changes the study design as I have separate staircases for different stimulus types that I’d like to mix together.

Norm

and got an interleaved staircase set up on a task that involves judging the duration of a pulsing stimulus. Unfortunately, when I post to pavlovia, the experiment only runs

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I’m pushing a sequential version of the task to the link above.

The original exp and conditions file are attached here.
Breath2024.psyexp (64.5 KB)
questDefinition.csv (358 Bytes)

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Hi, have you managed to fix the problem? I’m planning on running an interleaved Quest staircase online (using auditory stimuli). I’ve had no luck so far.

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Hi there,

I am also having trouble running Quest staircase online in Pavlovia.
I’m designing a simple visual discrimination task, asking participants to choose the lighter grey square. The task works as intended in PsychoPy running locally (StartVal used as starting “level”, and also minVal and maxVal followed). When pushed online to Pavlovia, the “level” starts at a number that is not StartVal, and it ignores the “range”. The “level” increasingly gets more negative with each trial then an error occurs.
Are you able to get Quest staircase to work online?
Thank you.
Michelle

5

Hi! I had to start running the study so I manually randomized my 4 staircase conditions and ran them in non-interleaved order. So each staircase follows the Quest algorithm, but they run one at a time for the prescribed number of trials and then moved onto the next.

The online staircase is still listed as in ‘prototype’ development by psychopy so hopefully a working example will be posted soon, there is no working example posted by psychopy staff to my knowledge.

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