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Megaputer announces the final release of PolyAnalyst 4.0, the newest version
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many thanks to numerous beta-testers who helped perfecting the system. An
evaluation copy of
On 9 Dec 1999 15:54:09 -0800, [EMAIL PROTECTED] (Mike Wogan)
wrote:
Forgive me if I'm tuning in here at the end of the discussion, but I'm
wondering:
- thanks! for tuning in - I have been reading it, and hoping
someone would say these things.
Who says locus of control is a pure,
subscribe EDSTAT-L Jeremy Humphries
You might like my reply.
Even with a low Alpha, the sum of the items is still a better measure
of the trait (locus of control) than any individual item. This assumes
that the items have 'face validity' as measures of locus of control.
It also assumes that whatever they do have in common is
Is the sum still a better measure of the "trait" than any individual item?
It is not clear what inferences can be drawn from the sum of the four items.
Reliability is the prerequisite of validity.
Whose face validity shall be relied on, given face validity is determined by
the eyes of the
When r^2 is referred to as the "coefficient of variation," 1-r^2 is referred to as the
"coefficient of nondetermination." What is, I believe, a much older term for the
latter is "coefficient of alienation." (I am not defending the terms, only reporting
them.)
Jerrold H. Zar, Professor
First, forget the responses from Chen and Donovan. No laws are being
violated by adding these items, or any items, together. And traditional
psychometric methods of evaluating the "unidimensionality" of items are not
going to be very persuasive with only 4 items.
As PChawla pointed out,
