This is a remarkable result but why is this the case? The reasons for 3D e-learning being so effective can be summarised as:
Learning is based in a contextually realistic environment. The transfer of learning to the real 3D world is subsequently greater. Interesting 3D courses hold the trainees attention leading to better processing of the data. 3D e-learning that is visually interesting will stand out when memorised and recalled better. Learners will be motivated to do more courses in future.