Age of acquisition (AoA) refers to the age at which people learn a particular item and the AoA effect refers to the phenomenon that early-acquired items are processed more quickly and accurately than those acquired later. Over several decades, the AoA effect has been investigated using neuroscientific, behavioral, corpus and computational…

This paper analyzes Piagetian theory on the relative development of cognition and language, the local homology model which claims there are specific language-cognition relationships at specific points in time, normal development and local homology, and development in language-impaired children. Implications for clinical decision making are…