[Rasch] Not a Fan of Lexiles?

Mike Linacre (RMT) rmt at rasch.org
Wed Oct 31 08:56:14 EST 2007


Friends:

The statement "could have been achieved using conventional 
deterministic/actuarial score algorithms" is true of many Rasch-based 
findings.

So why haven't those achievements been made prior to Rasch?

Because the philosophical basis inherent in Rasch is missing from earlier 
thinking. Rasch is not merely a statistical technique. It is a way of 
conceptualizing the problem to be solved and the approach to be used to 
solve it.

The geometry of Archimedes is a great analogy. He solved using geometry 
(and genius), problems which we would now solve using algebra. Geometry is 
like raw score theory. Algebra is like Rasch. But there never was a "raw 
score" Archimedes.

Mike L.

Mike Linacre
Editor, Rasch Measurement Transactions
rmt at rasch.org www.rasch.org/rmt/ Latest RMT:  21:1 Summer 2007
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