In my task (in the fMRI), participants are asked to enter a number between 0 and 99 in multiple trials.
I’d like to use a four-button button-box (1-4) to code for that number, such that two buttons control the 10s digit - one increases it and one decreases, and two buttons control the ones digit in a similar manner.
At the beginning of each trial, participants will see the number 55 and work their way from there, by increasing and decreasing each digit. This means that their actions would have to be displayed on the screen while they press the buttons. Ultimately, they may use a fifth button to confirm their selection.
Has anyone come across anything similar to that or has a clue on how to start?
I looked throughout the forum and couldn’t find a similar question.
Any advise would be highly appreciated!