PsychoJS trialHandler commands - a few questions

Online experiments
1

I am trying to understand whether it is possible to use one of the commands of PsychoJS trialHandler to return info about the number of trials presented and/or remaining. In reference to the git documentation, I think a couple of commands may be of use: getCurrentTrial, getEarlierTrial, getFutureTrial, getTrialIndex, but I can’t figure how (1) what does each of them actually do and (2) how to use them in the Code Component.

Basically, what I would like to do is refer to the total number of trials and present a break when half of the total number of trials has been presented.

Does anyone know whether this is at all possible at the stage of development?

2

Those functions allow you to find out the condition values for a future trial (e.g. know the word/ink colour of a future trial in the stroop). They don’t tell you then number of trials remaining/completed. Those come from various TrialHandler attributes listed in the library below, as in the Python TrialHandler:

3

I am sorry, I only check the documentation page and not the script. This topic can be deleted and we continue the discussion in my previous post.