What does a high mean length of utterance suggest about a child's language development?

A high mean length of utterance (MLU) is an important indicator of a child’s language development and suggests that the child is using longer and more complex sentences. This reflects a more advanced language ability, as children with a higher MLU are typically able to combine words into more elaborate phrases and engage in more sophisticated conversational exchanges.

As children develop their language skills, they progress from using single words to combining multiple words to form phrases and sentences. Children with a high MLU demonstrate their ability to use grammatical structures effectively, which indicates that they have a developing understanding of syntax and the rules of language. Thus, a high MLU is associated with measures of language proficiency and cognitive development, signifying that the child is making significant strides in their ability to communicate.

In summary, a high mean length of utterance strongly correlates with advanced language abilities, as it implies the child's capacity to form and use complex sentences in their speech.