home *** CD-ROM | disk | FTP | other *** search
- Comments: Gated by NETNEWS@AUVM.AMERICAN.EDU
- Path: sparky!uunet!paladin.american.edu!auvm!WATSON.BITNET!FOLGER
- Return-Path: <Folger@OLIVAW.watson.ibm.com>
- X-External-Networks: yes
- Message-ID: <9301221920.AA1215@OLIVAW.watson.ibm.com>
- Newsgroups: bit.listserv.stat-l
- Date: Fri, 22 Jan 1993 14:15:24 EST
- Reply-To: "Davis A. Foulger (914) 945-2077 (t. 862-2077)"
- <Foulger@WATSON.BITNET>
- Sender: STATISTICAL CONSULTING <STAT-L@MCGILL1.BITNET>
- From: FOLGER@WATSON.BITNET
- Subject: moderated multiple regression
- In-Reply-To: <.AA0102@OLIVAW.watson.ibm.com>
- Lines: 19
-
- EASGERK@UBE.BITNET writes:
-
- >I believe that since the interaction effect is the effect of interest I
- >should test for this directly -- and use the full equation as the basis for
- >describing the relationship.
-
- If your predictions are for the interaction, there really isn't any need to
- test the main effects at all (except perhaps as a matter of curiousity).
- The real question, to my mind, is making sure you have shaped the
- interaction to properly test the hypothesized relationship. The shape won't
- matter to the overall significance of the main effects and interaction
- together, but it can make a giant difference to the test of the interaction
- itself.
-
- Davis
-
- Snailmail..........................Davis A. Foulger
- Internet: FOLGER@WATSON.IBM.COM IBM T.J. Watson Research Center
- Prodigy: XFRR20A P O Box 218, Yorktown Ht, NY 10598
-