Date: Fri, 25 Jul 1997 00:53:21 -0700
Sender: "SPSSX(r) Discussion" <SPSSX-L@UGA.CC.UGA.EDU>
From: "Hector E. Maletta" <hmaletta@OVERNET.COM.AR>
Subject: Re: regression
Content-Type: text/plain; charset=us-ascii
> I would be very appreciative if anyone of you would direct me to the resources/SPSS commands that test if there is significant change in the magnitude of a regression coefficient of an independent variable when extra variables are added to the equation.
> Thank you very much.
> A. Tse
The STEPWISE method with the REGRESSION command does just that: each new
variable is added to the equation only if it passes two tests consisting
of: (a) explaining some more variable and (b) not being a perfect linear
function of other independent variables. Each test has a threshold,
above which the variable is not included. Moreover, once a new variable
is included, old variables are tested again for possible exclusion, on
The output provides measures of the amount of additional variance
explained at each step.
Universidad del Salvador
Buenos Aires, Argentina