COGNITIVE TESTING Attention and executive function will be assessed with the Trail Making Test A and B (TMT), Symbol Digit Modalities Test (SDMT), and A Quick Test of cognitive speed (AQT). Visuospatial ability will be measured by two subtests from the Visual Objects and Space Perception (VOSP) battery, incomplete letters and cube analysis. Memory will be assessed with the Free and Cued Selective Reminding Test (FCSRT) in cohorts A and B. It will be complemented with the 10-word delayed recall test from ADAS-cog, including a recognition part. Verbal ability will be evaluated with the animal and letter S fluency tests and the 15-item short version of the Boston Naming Test. Global cognition will be assessed with the Mini-Mental State Examination (MMSE). In cohort A and B, a computerized cognitive battery focusing on memory and attention will also be performed.