Handedness is of special significance to developmentalists because it is directly tied to how rapidly a child's vocabulary develops.

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Handedness is of interest because it is tied to brain lateralization. Lateralization is linked to language, in that language appears to be a lateralized function, especially for right-handed people. However, lateralization is not linked to the speed with which vocabulary develops.

Handedness Is of Special Significance to Developmentalists Because It Is