Traps to avoid when working with AI

More about those traps:

• the accuracy paradox: when you have imbalanced classes, the algorithm can be stuck, classifying everything in the major class. Some ways to tackle the problem are presented: gather more data, resample your data, change the metric, add penalty, change the algorithm or make data augmentation.
• the choice of the evaluation function: many metrics exist for a classification or a regression task, but in behavioral tasks it may be difficult to find the right one. One solution consists in defining the function as if you were speaking to a child.
• the overfitting spotting: in behavioral tasks, as you have no dataset and no validation error, it may be difficult to spot when you have overfitting or not. One way to avoid it is either to add randomness in the simulations or to test the models on real robots as soon as possible.