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Behav Res Methods. 2014 Mar;46(1):254-62. doi: 10.3758/s13428-013-0354-x.

Automatic generation of the index of productive syntax for child language transcripts.

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Computer Science Department, University of Texas at Dallas, Richardson, 75080, TX, USA,


The index of productive syntax (IPSyn; Scarborough (Applied Psycholinguistics 11:1-22, 1990) is a measure of syntactic development in child language that has been used in research and clinical settings to investigate the grammatical development of various groups of children. However, IPSyn is mostly calculated manually, which is an extremely laborious process. In this article, we describe the AC-IPSyn system, which automatically calculates the IPSyn score for child language transcripts using natural language processing techniques. Our results show that the AC-IPSyn system performs at levels comparable to scores computed manually. The AC-IPSyn system can be downloaded from .

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