Standardized scores for IPSyn?

[Brian MacWhinney]

Bruno,

   Scarborough's original paper was based on samples from 48 children.  Some of her tables are based on a longitudinal sample of 15 children.  She reports correlations with age and MLU and also shows that IPSyn scores for language-delayed children are higher than for controls.  However, there was never, as far as I know, an attempt to standardize the test.  In part, this may be because many of the items on the test involve a series of fairly tricky decisions and exclusions.  Now that we have developed an automated version of IPSyn, it seems to me that it would be a good first step to run it across data in CHILDES to see whether changes in some of these tricky scoring rules make a difference and also to consider whether adding additional features or items could improve correlations with age or other scores.  We are working on a method for doing this semi-automatically.  Personally, I would find this more valuable than an attempt to standardize.  But maybe others would disagree.  By the way, there is a literature of about 30 articles that use the IPSyn and those may have additional clues.

-- Brian MacWhinney

On Jun 3, 2011, at 5:20 PM, Bruno Estigarribia wrote:

> Hello all,
> 
> As far as I know, Hollis Scarborough's Index of Productive Syntax was never standardized, so only raw scores are available for statistical analysis. Is that correct?
> Thanks!
> 
> Bruno
> 
> Bruno Estigarribia
> Assistant Professor of Romance Languages and Literatures, Spanish Program
> Research Assistant Professor of Psychology, Cognitive Science Program
> Investigator, Carolina Institute for Developmental Disabilities
> University of North Carolina at Chapel Hill
> estigarr at email.unc.edu
> 
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