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- Message-ID: <PSYCGRAD%92121322280696@ACADVM1.UOTTAWA.CA>
- Newsgroups: bit.listserv.psycgrad
- Date: Sun, 13 Dec 1992 21:26:37 -0800
- Sender: Psychology Graduate Students Discussion Group List
- <PSYCGRAD@UOTTAWA.BITNET>
- From: Tor Neilands <tbn@UTXVM.CC.UTEXAS.EDU>
- Subject: Re: let's hear some opinions
- Lines: 52
-
- Julie writes:
-
- >Julie
- >St Andrews
- >
- >PS BTW, you imply that the fact that none of the 14 chi-squares was
- >significant
- >demonstrates that the research was not good quality. Obviously, you know more
- >about the method and the hypotheses than I do, but I'd like to point out that
- >this is *not* necessarily a bad thing. Getting p<=0.05 is not the be-all and
- >the end-all!
-
- No kidding. Couldn't agree more, not only because I believe that .05 is a
- pretty arbitrary cutoff (viva descriptive stats forever!), but because in
- some model fitting circumstances one actually wants to obtain a chi-square
- value with p>.05 (if one buys into the p-value "thang" in the first place).
- In this case, the null hyp. is that the model the researcher hypothesizes
- to fit the data in fact fit the obtained data. If p<.05, that's "bad"
- because the model was a bad enough fit to the obtained data to result in a
- rejection of the null. I mention this because my factor analysis instructor
- brought this up with stories he'd heard from journal editors who get
- manuscripts from authors who are "excited that their chi-square p-values
- are less than .05, thereby lending support to their predicted model(s)
- fitting the data"...poor fools...talk about carrying the worship of p<.05
- too far...
-
-
- Tor Neilands
- Systems Analyst
- Statistical Services Group
- Computation Center
- University of Texas at Austin
- Austin, TX 78712
-
- Phone: (512)-471-3241, Ext. 263
-
- Internet: TBN@Utxvm.cc.utexas.edu
- ___________________________________________________
-
- "To thy own self be true". --- Walt Whitman
-
- "Two roads diverged in a yellow wood and I, I took
- the road less traveled by, and that has made all the
- difference". --- Robert Frost
- ___________________________________________________
-
- Disclaimer: All of the views expressed above are solely
- those of the author. Any relationship between my own
- views and those of the University of Texas and/or The
- Computation Center at the University of Texas are
- due merely to regression to the mean.
- ____________________________________________________
-