As children begin to pull themselves into a standing position during the tenth and eleventh months, they become capable of using their vocalizations to express emotion and emphasis. This late babbling stage is characterized by more complex syllable combinations (ma-da-ga-ba), a lot of sounds-play and attempted imitations. This "pre-language" use of he sounds provides the child with some experience of the social role of speech because adults tend to react to the babbling, however incoherent, as if it is actually the child's contribution to social interaction.