University of Illinois, Champaign.
J Speech Lang Hear Res. 2018 Jun 19;61(6):1455-1459. doi: 10.1044/2018_JSLHR-L-17-0488.
The purpose of this letter is to clarify the psycholinguistic underpinnings of the tense marker total and tense agreement productivity score and to extend the discussion of when composite diversity and productivity measures are best used.
We encourage the use of composite diversity and productivity measures when assessing grammar early in development, but we discourage the use of composite accuracy measures until children demonstrate emergence of diverse tense/agreement morphemes across a sufficient number of low-frequency sentence frames.
这封信的目的是澄清时态标记 total 和时态一致产出分数的心理语言学基础，并扩展关于何时最好使用组合多样性和生产力测量的讨论。
我们鼓励在发展早期评估语法时使用组合多样性和生产力测量，但我们不鼓励在儿童表现出足够数量的低频句子框架中多样化的时态/一致形态出现之前使用组合准确性测量。
