How To Calculate Mlu
What is mean length of utterance mlu. To get this sample the slp can record a session in which they ask the child questions and create a dialogue through play interactions.
Gleason J B The Development Of Language M L U As Children Get
For example when children are first learning to talk their mlu is often 1 because they only use one word at a.
How to calculate mlu. Mlu stands for mean length of utterance. The relationship between child age and mean length of utterance measured in morphemes mlu was studied in a sample of 123 middle to upper middle class midwestern children aged 17 to 59 months conversing with mothers in free play. We will now provide a limited example of how to calculate a mean length of utterance mlu.
To calculate the mlu first you need a language sample from a child consisting of about 50 100 utterances. It is common for a specialist to collect a sample of 100 utterances. The mean length of utterance is a measurement that pertains to the way a child uses morphemes and the average.
It is necessary therefore to examine several utterances and then to calculate the average length of utterance based on a count of the number of individual morphemes in each utterance. Mean length of utterance or mlu is a measure of linguistic productivity in children it is traditionally calculated by collecting 100 utterances spoken by a child and dividing the number of morphemes by the number of utterances. Age accounted for 78 of the variance when mlu.
As a child ages and learns the lengths of his patterns of speech increase. The josephine chen center for speech and language pathology states that a healthy child s mean length of utterance score is generally close to her age 3. When we talk about increasing sentence length in children we often use the term mean length of utterance.
This refers to the average length of the sentences that a child typically uses. A significant correlation was found between age and mlu. A morpheme is considered the basic unit of speech.
After the language sample is attained the slp then counts the. To calculate the specialist divides the total number of morphemes that a child spoke by the total number of utterances. Language acquisition is a process that children move through at various rates.
A higher mlu is taken to indicate a higher level of language proficiency.
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