> Herman and N.N.,
> type III error means measuring the wrong construct or something
> nonexistent.In my German book about evaluation research(1985) I cited the
> following:
> "Statistician worry about two types of errors......:
> Type I error is rejecting a hypothesis when it should be accepted; Type II
> error is accepting a hypothesis when it should be rejected ...
> Evaluators commonly make two types of errors doing evaluations: Type III
> error is measuring something that does not exist; Type IV error is
measuring
> something that is of no interest to management and policy maker."
> (Scanlon et al., 1977,p.36 , cit. after Dobson & Cook, 1980, p. 270 )
> My ref. list tells me the following sources:
>
> Scanlon,J.E. et al., Evaluability assessment. Avoiding Type III or IV
> errors. In G.R. Gilbert & P.J. Conklin (Eds.), Evaluation management: A
> sourcebook of readings. Charlottesville,VA: US Civil Service Commission,
> 1977
>
> Dobson,L.D., & Cook, T. J. Avoiding type III error in program
> evaluation.Results from a field experiment.
> Evaluation and Program Planning, 1980,3,269-276.
>
> Cook,T. J. & Dobson, L. D. Reaction to reexamination: More on type III
error
> in program evaluation.
> Evaluation and Program Planning, 1982, 5 , 119-121.
>
> The problems discussed are related to a failed field experiment which is
my
> favorite example in teaching to my students what happens if no real
> manipulation checks are done for the treatment dummy. Nice story and
> discussions
> related to the so-called " challenge experiment" .See:
>
> Cook,T.J. , Dobson,L.D., & Rezmovic,E.L. Working with ex-offenders: The
> challenge experiment.
> Research Triangle Park,NC : Research Triangle Institute, 1980.
>
> HTH
>
> Werner
>
> Werner W. Wittmann; University of Mannheim; Germany;
> e-mail: [EMAIL PROTECTED]
>
>
> ----- Original Message -----
> From: Herman Rubin <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, October 31, 2000 2:05 PM
> Subject: Re: What's type III?
>
>
> > In article <8tl9ir$j9g$[EMAIL PROTECTED]>, kj0 <[EMAIL PROTECTED]>
wrote:
> >
> >
> > >What is a type III statistical error?
> > >(I know about types I and II).
> > >Thanks,
> >
> > This is the most common type; doing the wrong problem.
> >
> >
> >
> > --
> > This address is for information only. I do not claim that these views
> > are those of the Statistics Department or of Purdue University.
> > Herman Rubin, Dept. of Statistics, Purdue Univ., West Lafayette
> IN47907-1399
> > [EMAIL PROTECTED] Phone: (765)494-6054 FAX: (765)494-0558
> >
> >
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