Showing Thought-Probe trials randomly

Builder
1

OS (e.g. Win10): Win11
**PsychoPy version: 2024.2.4 Py 3.8
Standard Standalone Installation? (y/n) If not then what?: y
Do you want it to also run online? (y/n): n
**What are you trying to achieve?: We want to make a PVT task with thought probe. In the task, the thought-probe question will be shown 3 times randomly during 30 trials (i.e., 3/30 thought-probe inserted). Also, the thought-probe question should not be presented first 3 trials.

**What did you try to make it work?: Attached is my experiment file that run PVT task with thought-probe question in every trials. we already have seen related threads in this forum.

**Link to the most relevant existing thread you have found: Insert probe randomly, but then finish the rest of the trials in a block

**What specifically went wrong when you tried that?: There is no errors, but we want to know how we can present the thought-probe question randomly 3 times during experiment as described above.
PVT_Test_with_ThoughtProbe.psyexp (79.0 KB)

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Hello @lemon

You could create a randomized list of trial-numbers excluding the first three trials.

trialPos = random.choice(range(3,31),3)

If the trial-number corresponds to trialPos, show the thought-probe question.

Best wishes Jens