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Index of Productive Syntax

  • Hollis S. Scarborough (a1)


A new method for evaluating the grammatical complexity of preschool natural language corpora is introduced. In the Index of Productive Syntax, occurrences of 56 syntactic and morphological forms are counted, yielding a total score and subscores for noun phrases, verb phrases, questions/negations, and sentence structures. Development of the index and analyses of its reliability and age-sensitivity when applied to language samples of 2- to 4-year-olds are described. Some advantages and limitations of the index as a research and clinical instrument are also discussed.


Corresponding author

Department of Psychology, Brooklyn College of CUNY, Brooklyn, NY 11210


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Applied Psycholinguistics
  • ISSN: 0142-7164
  • EISSN: 1469-1817
  • URL: /core/journals/applied-psycholinguistics
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