How to Use the Calculator
- Count the total number of utterances your child made during a specific observation period (typically 5-10 minutes).
- For each utterance, count all morphemes (word parts) including verbs, nouns, adjectives, adverbs, prefixes, suffixes, etc. For example, "runnin'" has two morphemes: "run" and "-in'."
- Enter the total number of utterances in the "Total Number of Utterances" field.
- Enter the total number of morphemes in the "Total Number of Morphemes" field.
- Click the "Calculate" button to determine the MLU score.
Understanding the Results
The MLU score provides a standardized measure of language development. A higher MLU indicates more complex language use. The calculator also includes developmental guidelines to help interpret the score in the context of typical language development milestones.
Important Considerations
- MLU should be calculated consistently using the same observation period for accurate tracking of development.
- For young children, observe and record their spontaneous speech rather than asking them to answer questions.
- Remember that MLU is just one measure of language development and should be considered alongside other developmental indicators.
- Individual variations exist in language development - use MLU scores as guidelines rather than strict milestones.