Hi Bissera! Always happy to help!
For however much I can remember, the relative duration feature was specifically for audio responses, because you needed the background audio response to record a variable length that depends on the audio stimulus. The current case sounds like a different setup, where you want the fixation (i.e., a text stimulus) to disappear after a variable duration?
If so, a solution available right now would be using the "trial yoking" method. Essentially, you'd put the fixation and the audio stimulus on one trial template, the response on another, and yoke the two trial templates together. We have a tutorial on this in case you haven't come across with it yet: https://news.findingfive.com/2019/07/17/...ed-trials/
That way, the fixation "disappears" automatically because the experiment moves onto the response trial after the stimulus presentation. You won't need to specify the duration of the fixation anymore as it just concludes with the end of the trial. Let us know if this works!
For however much I can remember, the relative duration feature was specifically for audio responses, because you needed the background audio response to record a variable length that depends on the audio stimulus. The current case sounds like a different setup, where you want the fixation (i.e., a text stimulus) to disappear after a variable duration?
If so, a solution available right now would be using the "trial yoking" method. Essentially, you'd put the fixation and the audio stimulus on one trial template, the response on another, and yoke the two trial templates together. We have a tutorial on this in case you haven't come across with it yet: https://news.findingfive.com/2019/07/17/...ed-trials/
That way, the fixation "disappears" automatically because the experiment moves onto the response trial after the stimulus presentation. You won't need to specify the duration of the fixation anymore as it just concludes with the end of the trial. Let us know if this works!