[Rasch] SD or SE and differences in exam attempts

Shu-Ren Chang changshuren at huskers.unl.edu
Thu Nov 19 04:20:53 AEDT 2015

Hi, Patrick, You might find the paper useful for the explanations from the link below:


Statistics Corner Questions and answers about language ...
Shiken: JALT Testing & Evaluation SIG Newsletter, 3 (1) April 1999 (p. 20-25) 20 Statistics Corner Questions and answers about language testing statistics:
Read more...<http://jalt.org/test/PDF/Brown4.pdf>


Shu-Ren Chang, Ph.D.
Psychometrician (Principal Consultant)

Student Assessment

Illinois State Board of Education, Springfield, IL

Cell Phone:  217-220-7129
Personal email:  changshuren at huskers.unl.edu<mailto:changshuren at huskers.unl.edu>

From: rasch-bounces at acer.edu.au <rasch-bounces at acer.edu.au> on behalf of Patrick Fisher <pfisher at sportsmeasures.com>
Sent: Wednesday, November 18, 2015 9:42 AM
To: rasch at acer.edu.au
Subject: [Rasch] SD or SE and differences in exam attempts

Greetings all,

I have a question about a situation I'm examining.

I am looking at some people who have multiple attempts on some high-stakes certification exams and looking at performance improvements over previous attempts. In considering the magnitude of these differences, which is more telling and why: jumps in standard deviation or standard error of measurement?

Thank you very much,

Patrick Fisher

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