Adaptive Intelligent Tutoring Systems (ITS) aim at helping students going through the resolution of a given problem in a principled way according to the desired outcomes, the intrinsic capabilities of the student, and the particular context in which the exercise takes place. These systems should be capable of acting according to mistakes, boredness, distractions, etc. Several works propose diff...

Edwards et al. 1 revisited well-known studies reporting power-laws in the frequency distribution of flight duration of wandering albatrosses 2,3 , and concluded that no Lévy process 4,5 could model recent observations with higher resolution. Here we show that this re-analysis 1 suffers from a conceptual misunderstanding, and that the new albatross data remain consistent with a biological Lévy f...