16 It is also worth noticing that the first system, which performs significantly better than the others, is the only one which was not optimized to minimize the MAE but to maximize the DeltaAvg score .
this system obtains a recall higher than the others in most cases (especially in the 5% and 10% tails), which is certainly due to the fact that it assigns more scores far from the mean (in other words, this system takes more risk).