Dubious minutes are accumulated training minutes of very poor or no active training. This article will explain in detail the three reasons that minutes are marked as dubious.

When we detect any of the above behaviors the entire session (and all associated minutes in that session) is marked dubious.


Sandbagging occurs when a student purposely waits to answer training questions, or lingers on a word page without actually reviewing it. A session is only marked as dubious due to sandbagging if it contains three instances of 2+ minutes of inactivity. For more information, please read this article on sandbagging.

Very Low Accuracy

Some students intentionally answer questions wrong by randomly clicking on choices. We understand that some students take more time to comprehend new words than others, but very low accuracy is usually a sign that the student is distracted and is just going through the motions to waste time.You'll notice that this behavior is often accompanied by review times of 10 seconds or less.


Some students will attempt to cheat by using a script or program to train for them. For more information, please review our article on cheating, and how to identify cheating