 Finally, Dressler developed a new model of language development, that of pre- and proto-morphology.Dressler assumes that language is self-organising in the child, thereby passing through a stage 'before' morphology and then through a stage of a very simple morphology, until finally the child learns to adapt to the adult target model of grammar.In other words, a child neither inherits nor learns a grammatical function, but is able to gradually derive the full morphological meaning from fewer and more concrete functions which are developed and discovered first.