This application reproduces on touchscreen devices the neuropsychological test called "Trail Making Test", introducing new experimental features. To do this, there are 2 modality of interaction with the screen: in the first, the sequence is selected by simply touching the circles, on display will appear straight lines that connect the selected circles, green or red depending on whether the selection has been made in the right sequence or not (to delete the red line, click on the black backgro