Dementia and Mild Cognitive Impairment: Assessment of Cognitive Functioning, Functional Autonomy, and Neuropsychiatric Symptoms.

Inclusion Criteria: * Age between 50 and 86 years. * Suspected or confirmed diagnosis of dementia or mild cognitive impairment (MCI). * Referral to the neuropsychology clinic for initial assessment or clinical monitoring. * Absence of behavioral, psychiatric, or sensory disorders severe enough to significantly impair cognitive testing or completion of questionnaires. Exclusion Criteria: * Presence of neurological disorders other than dementia or MCI (e.g., recent stroke, severe traumatic brain injury, epilepsy, multiple sclerosis, atypical neurodegenerative diseases). * Unstable major psychiatric comorbidities at the time of assessment (e.g., schizophrenia, bipolar disorder in active phase, untreated severe depression). * Uncorrected severe sensory deficits (visual or auditory) affecting the validity of cognitive or functional assessments. * Use of medications with significant cognitive impact (e.g., sedatives, high-dose antipsychotics) not stabilized at the time of evaluation. * Presence of terminal medical or oncological conditions or other illnesses significantly interfering with the assessment procedures.