How do Continuous Performance Tasks work?

Several exercises in BrainHQ are known as continuous performance tasks (CPT) exercises. These are exercises that move quickly and require a fast response. The nature of these exercises means that they are scored both on accuracy of answers are and also speed of response. Because they are scored via these metrics, there are actually two ways to be marked wrong during a trial.

When BrainHQ users report being marked wrong even though they are confident that they had answered correctly, this is usually because they had answered after time had run out for that trial.