Soon we will change our normings from IQ’s to Indexes and we will also change from Cronbach’s Alpha to Kuder and Richardson Formula 20.

Why?
Cronbach’s Alpha allows for questions to have partial correct answers and multiple correct answers, while Kuder and Richardsons Formula only accounts for ”right” och ”wrong” alternatives – and that is the type of tests that I provide.
And for a quick comparison .71 at Cronbach’s Alpha corresponds to approximately .5 Kuder and Richardson Formula.

I’m currently developing my mathematics for the indexes to come!

Some changes in the norming and reliability procedures!

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