Fig. 3From: Non-intrusive assessment of learners’ prior knowledge in dialogue-based intelligent tutoring systemsThe Experiment Design The experiment from which we collected data included five sessions: one pre-test session (supervised by teachers), 3 training sessions (fully-online, unsupervised, anytime/anywhere), one post-test session (supervised by teachers). After each training session, student took a short post-test (unsupervised) to measure immediate learning gainsBack to article page