If you have not walked
p5.html
yet, start there. This page is the instrument: a fixation, a random
delay, twenty trials, and a CSV. Press space (or click) when the
square appears. In the choice block, gold is F and blue is J. Write a
predicted mean before you start. Export into data/.
Simple: space bar or click. Choice: F = gold, J = blue. Practice means are not findings.