eSDMT

This app presents a simple symbol–number matching activity. A symbol appears in the middle of the screen, and the user must find its corresponding number in the guide at the top. The correct number is selected by pressing the matching key. Each time a key is pressed, whether correct or not, a new symbol is shown. The app includes a short 40-second trial to get familiar with the task, followed by a 90-second main session. The interface is designed to be clear and minimal, making it easy to use for quick practice or regular mental exercises.