Thank you Donald for your quick answer.
I did a small block design of 20 seconds for all my conditions, but the
participants responded more or less rapidly between trials and conditions.
I first used the RT to determine the duration of all my blocks but I
learnt after that the proper way to do it was to used a fixed time-window
and to indicate after the RT as a factor of non-interest, so I used pmod.
For you it is still the wrong approach?
Thank you in advance
Best regards
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