Basic Task Structure
First off, we need to refer back to the figure from our paper, specifically part C. See below.
QRTE.Stimulus (3 times)
Glossing over each type of ‘tag’ in use, one will find that for all trial blocks (in the Stroop Task, but also in the Skeleton task and/or any derivatives), exactly one Init and exactly one Exit question is use. Next to that, any amount of Stimulus questions are permissible to be used inside a trial block. The most basic reason for this structure is that the QRTEngine needs to know when the trial block starts and when it ends, in the process it doesn’t care about the amount of stimuli in a given trial. In the Attentional Blink Task <Link to it!> we made available for download you will find a trial block with many stimuli between the Init and Exit questions.
Init thus marks the start of the trial block and it triggers the QRTEngine to initialize the trial, whereas Exit marks the end and QRTEngine exits the trial (when exiting it stores the current trial’s data). Between the Init and the Exit the QRTEngine, by default, works through each Stimulus question one by one, in a serial manner. Only displaying the next stimulus when the current stimulus has been disabled (nb, a quick tutorial has been written on how to make multiple stimuli active at the same time, click here).
Thanks for reading!