Old age (reading) ; Old age (speech perception) ; Word frequency effect (psycholing.) ; Versprecherhäufigkeit; Speech error rate; Frequency (psycholing.) ; Critical period (language acquisition) ; Alter (Einfluss auf Spracherwerb) ; Age (influence on language acquisition) ; Age of acquisition; AoA; Sensitive period (language acquisition) ; Sprachfehler; Language attrition (pathol.) ; Language loss (pathol.) ; Sprachverlust (pathol.) ; Speech pathology ; Morbus Alzheimer ; Word deafness; Lexikalischer Zugriff (pathol.) ; Lexical access (pathol.) ; Word recognition (pathol.)