[Rasch] Fwd: Re: Fwd: CCA query

Michael Lamport Commons commons at tiac.net
Tue Apr 24 00:51:49 EST 2012

We have an instrument for which the order of hierarchical complexity or 
an item predicts the Rasch item difficulty with an /r/ = . 984.  A 
person at A.C.E.R randomly took the test.  Here are her comments

Any  thoughts?
---------- Forwarded message ----------
From: "Coleiro, Amanda" <Amanda.Coleiro at acer.edu.au 
<mailto:Amanda.Coleiro at acer.edu.au>>
Date: Apr 23, 2012 3:07 AM
Subject: CCA query
To: "Andrew Richardson" <andrewmrichardson at gmail.com 
<mailto:andrewmrichardson at gmail.com>>
Cc: "Lim, Li-Ai" <LiAi.Lim at acer.edu.au <mailto:LiAi.Lim at acer.edu.au>>

Dear Andrew,
I’ve been working through some final checks of the three CCA assessments 
on our online system over the past week or two. While checking the 
sample reports generated, I found that randomly clicking on the buttons 
in the assessment was generating ‘Formal’ stage results. Considering 
that respondents must respond to each item, do you have any information 
about the validity of the results or is there a way of administrators 
being able to determine if a test taker was guessing the answers?
We thought that if the items have been linked to the stages (for 
example, if items 1 to 10 are linked to the Primary stage, items 11 to 
16 to the Concrete stage), then it may be possible to provide a second 
page to the report showing the client’s responses on a scale, which 
would indicate at what stage they began responding incorrectly.
I look forward to hearing your thoughts on this.
Best wishes,

Amanda Coleiro
Project Editor

Australian Council for Educational Research
19 Prospect Hill Road, Camberwell   VIC   3124

t: (03) 9277 5462
f: (03) 9277 5432
e: amanda.coleiro at acer.edu.au <mailto:amanda.coleiro at acer.edu.au>
_http://www.acer.edu.au_ <http://www.acer.edu.au/>

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