Date:         Thu, 9 Nov 2000 08:21:24 -0800
Reply-To:     glaser@pacific-science.com
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Dale Glaser <glaser@PACIFIC-SCIENCE.COM>
Subject:      Re: comparing b's or beta's
Comments: To: Wim Beyers <Wim.Beyers@PSY.KULEUVEN.AC.BE>
In-Reply-To:  <3A0A50A8.3E7C0F50@psy.kuleuven.ac.be>
Content-Type: text/plain; charset="iso-8859-1"

Wim.......in the past I have used the formula from Cohen and Cohen (1983) on
page 56 when comparing the significance of the difference between
independent Betas....Zar  (1999) in chapter 18 (p. 360) in his
Biostatistical Analysis text also has a section on comparing two slopes;
however, and unfortunately I did not save it, I know some one developed a
macro for the test of two independent betas..............hope this
helps..........dale glaser

-----Original Message-----
From:   SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of Wim
Beyers
Sent:   Wednesday, November 08, 2000 11:22 PM
To:     SPSSX-L@LISTSERV.UGA.EDU
Subject:        comparing b's or beta's

Dear all,

    After having applied a hierarchical regression procedure in two
groups separately (boys and girls) I want to compare the estimated
parameters between the two groups, e.g. the b's (regression weights) or
beta's (standardized). Is there any way to do it, either with computer
power, either by hand (e.g. a kind of z-test like we have for comparing
correlations) ?
    Someone with experience in this matter ?
--
Wim Beyers