%0 Journal Article %1 rohwer2016longitudinal %A Rohwer, Goetz %D 2016 %K use:doi10.5157/NEPS:SC2:3.0.0 from:nina_woerlein %T Longitudinal Measurement of Childrens’ Receptive Vocabulary with NEPS Data %X I consider two tests of receptive vocabulary administered, respectively, in the first and third wave of starting cohort 3 of the National Educational Panel Study (NEPS). The first test was administered in 2011 in a sample of children visiting a Kindergarten in that year; a second test took place two years later. I compare test results of 518 children who have participated in both tests. I first use 38 items which are identical in both tests. Based on sum scores, one sees a remarkable increase in the receptive vocabulary. I then show that the data are not compatible with a joint Rasch model which assumes time-invariant item parameters. As an alternative basis for longitudinal comparisons I suggest that a sufficient condition for two tests measuring the same kind of competence is that they consist of identical items.

@article{rohwer2016longitudinal, abstract = {I consider two tests of receptive vocabulary administered, respectively, in the first and third wave of starting cohort 3 of the National Educational Panel Study (NEPS). The first test was administered in 2011 in a sample of children visiting a Kindergarten in that year; a second test took place two years later. I compare test results of 518 children who have participated in both tests. I first use 38 items which are identical in both tests. Based on sum scores, one sees a remarkable increase in the receptive vocabulary. I then show that the data are not compatible with a joint Rasch model which assumes time-invariant item parameters. As an alternative basis for longitudinal comparisons I suggest that a sufficient condition for two tests measuring the same kind of competence is that they consist of identical items.}, added-at = {2016-04-07T09:57:34.000+0200}, author = {Rohwer, Goetz}, biburl = {https://www.bibsonomy.org/bibtex/2d999b145d86e9a2e37f6c4aded9ef3fd/neps.dc}, interhash = {03f0c593a3fe758d48f3d2ecf13d4934}, intrahash = {d999b145d86e9a2e37f6c4aded9ef3fd}, keywords = {use:doi10.5157/NEPS:SC2:3.0.0 from:nina_woerlein}, month = mar, timestamp = {2016-04-07T09:57:34.000+0200}, title = {Longitudinal Measurement of Childrens’ Receptive Vocabulary with NEPS Data}, year = 2016 }