Collecting non-predetermined-number of keystrokes in 1 "trial"

[CarolynBuck-Gengler]

Thanks again for the answer on collecting a sequence of keystrokes (#801). I had marked that question as answered, so I don't know if my related question will get seen and therefore I am reposting that question here.

The solution of stringing together several html-keyboard-response trials I think (haven't had a chance to try yet) will work well (haven't had a chance to try yet) when the number of keystrokes is known and forced to be a set amount.

I am curious how one would manage setting up the trials when the number of keystrokes is not knows (e.g., a word, or to allow the user to make the error of typing too few or too many), with a set key (e.g., ) to end the sequence. I would think there would also be a maximum number of keystrokes allowed (so that they couldn't run on forever). But how would one terminate the set of trials when the terminating keystroke is entered?
Also, could one also capture backspacing if the subject were to try to correct the response (if that is allowed)?

Thanks,
C

[conbainbridge]

One way you could set this up would be using a conditional loop: https://www.jspsych.org/overview/timeline/#looping-timelines

You could set it up so that, for example, if the key pressed = 32 (spacebar), then continue to a new trial, otherwise keep looping the same trial.

[jodeleeuw]

This also might be a case where a custom plugin is worth writing. I wrote a sort of similar kind of plugin that I described in this answer:

#819

[CarolynBuck-Gengler]

Thank you, both of you. I'll try the conditional loop and also look at #819.
Carolyn