interaction contrasts

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interaction contrasts

Jordan Kennedy
Hi everyone:

I have a pretty simple 2 X 2 Mixed Model design (1 repeated measures
factor and 1 between subjects factor). I would like to generate
interaction constrasts. Could someone provide some general code to
generate these? Thanks in advance!

Jordan

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Re: interaction contrasts

Ryan
Jordan,

You need not look any further than the parameter estimates Table to obtain the test for the 2X2 interaction term. What other specific contrast interests you?

Ryan

On Aug 15, 2012, at 2:32 PM, Jordan Kennedy <[hidden email]> wrote:

> Hi everyone:
>
> I have a pretty simple 2 X 2 Mixed Model design (1 repeated measures
> factor and 1 between subjects factor). I would like to generate
> interaction constrasts. Could someone provide some general code to
> generate these? Thanks in advance!
>
> Jordan
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD

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Re: interaction contrasts

Keli Saporta
In this case the solution is simple you add this in the procedure
/   EMMEANS = TABLES(a*b) COMPARE(a)

For example
If my design is two independent variables A and B each with two levels(1 or 2).you performed ANOVA
UNIANOVA
 y BY a b
 /METHOD = SSTYPE(3)
 /INTERCEPT = INCLUDE
   /PRINT = DESCRIPTIVE
 /CRITERIA = ALPHA(.05)
/ EMMEANS = TABLES(a*b) COMPARE(a)
  /DESIGN =a b a*b .

In this case the simple effect of a will be tested
If you want to test the simple effect of b in the compare command b will be in parentheses

Good Luck


Kelly Saporta, Ph.D.
Department of Education and Psychology
The Open University, Ra'anana, Israel 43107
Phone: +972-9-7781456,
Email:  [hidden email]
http://www.openu.ac.il/Personal_sites/kelli-saporta/


-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of Ryan Black
Sent: Thursday, August 16, 2012 2:48 AM
To: [hidden email]
Subject: Re: interaction contrasts

Jordan,

You need not look any further than the parameter estimates Table to obtain the test for the 2X2 interaction term. What other specific contrast interests you?

Ryan

On Aug 15, 2012, at 2:32 PM, Jordan Kennedy <[hidden email]> wrote:

> Hi everyone:
>
> I have a pretty simple 2 X 2 Mixed Model design (1 repeated measures
> factor and 1 between subjects factor). I would like to generate
> interaction constrasts. Could someone provide some general code to
> generate these? Thanks in advance!
>
> Jordan
>
> =====================
> To manage your subscription to SPSSX-L, send a message to
> [hidden email] (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD