[Rasch] Help on Newton Raphson Method

Mike Linacre (RMT) rmt at rasch.org
Fri Jul 9 08:02:10 EST 2010


Thank you for your question, Ranganath.

www.rasch.org/rmt/rmt102t.htm shows Netwon-Raphson estimation of Rasch 
ability measures for response strings based on known item difficulties.

Mike L.

At 7/8/2010, you wrote:
>I am working on implementing the theta estimation of an examinee given his 
>response vector to a test. I have read that Newton Raphson method gives a 
>reliable estimation of the ability estimates. Can anyone suggest the 
>reading material for implementing the NR method with step by step explanation.

Mike Linacre
Editor, Rasch Measurement Transactions
rmt at rasch.org www.rasch.org/rmt/ Latest RMT:  23:4 Spring 2010
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