Hi, I was wondering if anyone could help guide me on how to do the following for an experiment I am making using PsychoPy: I want to make it so that participants must get 80% of practice trials correct before they can progress to the main experiment. Is this possible? Is there a way to random…

Hi there, You can achieve the first by using a while loop. I am not familiar with Builder, but this should be doable. If you want to try it with coder you could have a look at this thread about the same issue: [image] Conditional looping problem Coding hello, I am trying …

Hi Jan, Is it possible you could elaborate a bit further on the loop for the second part please? By ‘forloop’ do you mean, a loop within a loop? Thanks! Josh

Hi Daniel, Thanks for the solution, I’ll be sure to give it a try-out. Josh

Hi Josh, In Builder, you could do something along the following lines: Add a code component to your trial In “Begin Experiment”, add the following: respcorrs = [] minNrPractice = 25 # min number of trials to practice considerNrTrials = 20 # number of trials to consider for accuracy calculation…

Hi Jan, Thanks for your help! I put in the code but the problem I’m now having is that it has become an infinite loop. Even if you get five trials correct, it just keeps going. I want it so that once the participant has got a minimum of 4 trials right, they can progress. Any recommendations for how…

Hi Josh, Could you please post your adaptation of the code? Thank you, Jan

Hi Jan, I’ve added the entire script and the corresponding spreadsheet below if that’s okay. Thanks! Model layout.psyexp (17.2 KB) Practice_Trials.xlsx (8.3 KB)

Hi Josh, You should remove the second loop around your practice trials, and increase the number of repetitions for your first loop (to 10, or whatever; it doesn’t really matter as the loop should be interrupted when a sufficient accuracy is achieved). Alternatively, you could also introduce more tr…

Hi Jan, This appears to have fixed it, thanks so much. Spent about 20 hours trying to figure all this out! I don’t suppose you could give me some guidance as to how to add a final feedback message i.e. once 5 trials have passed, if you have less than 80% accuracy, a message appears saying ‘You need…

Correct trials percentage threshold and condition order randomisation

Coding

daniel.riggs1 December 2, 2016, 1:05pm 3

I just proposed a solution to a very similar question to this, you can download the experiment and give it a good hard look, because conceptually it’s the same.

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Correct trials percentage threshold and condition order randomisation

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