Also on show is one of the three rolling chassis, this one restored, that were used for development testing. (classicandperformancecar.com)
Follow - up visits when the children were 30 months showed that toddlers whose mothers talked to them more at 15 months scored higher on a language development test. (gse.harvard.edu)
The research involves baseline and end of project physical development tests, as well as questionnaires and interviews with parents and teachers. (schoolstogether.org)