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. Author manuscript; available in PMC: 2017 Sep 24.
Published in final edited form as: Neuropsychologia. 2007 Mar 31;45(11):2525–2533. doi: 10.1016/j.neuropsychologia.2007.03.023

Table 1. Examples of Production Measures Analyzed.

Measure Description Example: Tall parents often have tall kids.
Tokens Fluency measure: counts the overall number of words spoken “Tall – parents – often – have – tall - kids”
Tokens = 6
 Number of words: 6
MLU (Mean Length of Utterance) Complexity measure: average of number of morphemes per utterance “Tall - parent – s(Plu) – often – have – tall – kid – s(Plu)”
MLU = 8
 Number of Morphemes: 8
 Number of Utterances: 1
TTR (Type-Token Ratio) Semantic variety measure: divide number of unique words by total number of words “Tall – parents – often – have – kids
TTR = 0.83
 Number of unique words: 5
 Number of words: 6