Cognitive ReserveMultilingualismMind-Body Relations, MetaphysicalNeuropsychological TestsNamesCognitionProdromal SymptomsSign LanguageCognition DisordersPsycholinguisticsPersons With Hearing ImpairmentsExecutive FunctionLanguageMemory, EpisodicVerbal BehaviorAgingEducational StatusIntelligenceAlzheimer DiseaseVerbal LearningAtrophyBrainDementiaLeisure ActivitiesReadingIndividuality