Interest of Two Digital Devices for the Diagnosis of Neurocognitive Disorders in Elderly People With Cognitive Symptoms.

The goal of this clinical trial is to compare conventional clinical data collected as part of usual practice with data collected by the two digital tools to help diagnose major and minor neurocognitive disorders in elderly people consulting a memory center for cognitive complaints. The main question\[s\] it aims to answer are: * Is it possible to create a classification between the different intensities of cognitive impairment? * Is it possible to create a diagnostic tool consistent with the reference diagnosis? Participants will be asked to complete a series of cognitive and fine motor tasks, and will be given questionnaires on their lifestyle and medical history. They will be asked to wear a connected watch for 1 week. There is no comparison group.