Some acquiredbehavioursbiologicallyculturesdevelopmentfirsthearimitationirregularregular, such as the ability to grasp objects or walk are acquiredbehavioursbiologicallyculturesdevelopmentfirsthearimitationirregularregular determined because all children, regardless of their culture, learn to do it pretty much at the same stage in their acquiredbehavioursbiologicallyculturesdevelopmentfirsthearimitationirregularregular.
Babies in all acquiredbehavioursbiologicallyculturesdevelopmentfirsthearimitationirregularregular learn to talk between 18 and 28 months of life.
Some behaviours are never naturally acquiredbehavioursbiologicallyculturesdevelopmentfirsthearimitationirregularregular so if you never learn to ride a bicycle or play a decent game of chess, you will not magically develop the ability to do so, no matter how long you live.
In their acquiredbehavioursbiologicallyculturesdevelopmentfirsthearimitationirregularregular languages, children often use acquiredbehavioursbiologicallyculturesdevelopmentfirsthearimitationirregularregular forms and then revert to an inaccurate acquiredbehavioursbiologicallyculturesdevelopmentfirsthearimitationirregularregular form before once more acquiring the irregular form. So, for example, a child may produce The mice ran up the clock, then begin to say The mouses runned up the clock before settling on the correct version later.
If this is true, the importance is obvious: it means that language cannot be being acquired by simple acquiredbehavioursbiologicallyculturesdevelopmentfirsthearimitationirregularregular and practice. If it were, children would never produce something like *comed instead of came for the simple reason that they would never acquiredbehavioursbiologicallyculturesdevelopmentfirsthearimitationirregularregular it.