These pages share the same in-browser model as Analyse. Use them to build intuition before you bring your own data — or to stress-test what a confusion matrix can and cannot tell you.
Space Builder
Build an underlying perceptual space, break separability or independence, watch the confusion matrix change, then run a virtual experiment and see whether GRIN recovers what you built.
Start here →Live task
Do a short identification task yourself and watch the model refit after every response, including the stopping rule.
An independence problem
Separability is often recoverable; within-stimulus correlation is harder. This page shows why, what it means for study design, and how GRIN surfaces the uncertainty.
Where to be careful →