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# Re: st: SimpleSlopes in Multilevel Models

 From Stas Kolenikov To statalist@hsphsun2.harvard.edu Subject Re: st: SimpleSlopes in Multilevel Models Date Sat, 4 Feb 2012 18:50:27 -0500

```The line with EExPOS shows Wald test for whether this interaction is
equal to zero. The p-value is 0.043, and you would need to interpret
it in the context of your substantive problem.

On Sat, Feb 4, 2012 at 6:08 PM, Kerstin Alfes <KAlfes@gmx.de> wrote:
> Sorry, it's between ZSchaufeli_Short and zpos, Question33 and v_246 are controls for age and gender.
>
> Best wishes
> Kerstin
>
> -------- Original-Nachricht --------
>> Datum: Sat, 4 Feb 2012 17:07:39 -0500
>> Von: Stas Kolenikov <skolenik@gmail.com>
>> An: statalist@hsphsun2.harvard.edu
>> Betreff: Re: st: SimpleSlopes in Multilevel Models
>
>> So what is this EExPOS an interaction of?
>>
>> On Sat, Feb 4, 2012 at 11:31 AM, Kerstin Alfes <KAlfes@gmx.de> wrote:
>> > Hello Stas
>> >
>> > I am using stata 11.1, this is an example of my syntax
>> >
>> > xtmixed logPerformance1 Question33 v_246 ZSchaufeli_Short zpos EExPOS ||
>> Team: ZSchaufeli_Short zpos, mle variance
>> >
>> > This is the output I get and I would like to probe the interaction term
>> EExPOS further and find out whether the simple slopes are significant.
>> >
>> > logPerform~1       Coef.   Std. Err.      z    P>|z|     [95%
>> Conf. Interval]
>> >  Question33    .0027937   .0242461     0.12   0.908
>>  -.0447277    .0503151
>> >       v_246   -.0003632   .0007304    -0.50   0.619
>>  -.0017947    .0010683
>> > ZSchaufeli~t    .0142171   .0112795     1.26   0.208
>>  -.0078902    .0363244
>> >        zpos   -.0049291   .0096467    -0.51   0.609
>>  -.0238363    .0139781
>> >      EExPOS   -.0141973   .0070321    -2.02   0.043
>>  -.02798   -.0004145
>> >       _cons    .7707479   .0306269    25.17   0.000
>> .7107203    .8307755
>> >
>> > Best wishes
>> > Kerstin
>> >
>> > -------- Original-Nachricht --------
>> >> Datum: Sat, 4 Feb 2012 10:44:49 -0500
>> >> Von: Stas Kolenikov <skolenik@gmail.com>
>> >> An: statalist@hsphsun2.harvard.edu
>> >> Betreff: Re: st: SimpleSlopes in Multilevel Models
>> >
>> >> In Stata, the output of every estimation command is accompanied with
>> >> the default test that this coefficient is equal to zero (which is
>> >> sensible for most slopes and correlations, although may not be so
>> >> sensible for variances). Moreover, every coefficient can be tested
>> >> with -test- command. Its syntax is daunting for a beginner, but you'd
>> >> start appreciating it very quickly as you move from your MPlus or
>> >> LISREL or MLWin experience.
>> >>
>> >> If you gave an example of your syntax (that's what FAQ very strongly
>> >> suggests) and your output, we could help with the specific -test-
>> >> command.
>> >>
>> >> On Sat, Feb 4, 2012 at 10:15 AM, Kerstin Alfes <KAlfes@gmx.de> wrote:
>> >> > Dear All
>> >> >
>> >> > I ran a multilevel regression using the xtmixed command in stata.
>> >> >
>> >> > I have a significant interaction term between two level 1 variables
>> and
>> >> I
>> >> > would like to test the simple slopes now. It seems that I need the
>> >> > Asymptotic Covariance Matrix to do this. Does anbody know how to get
>> the
>> >> > ACOV in STATA? Or, is there an alternative way to test the
>> significance
>> >> of
>> >> > the simple slopes?
>> >> >
>> >> > Many thanks
>> >> > Kerstin
>> >> > --
>> >> > Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
>> >> > belohnen Sie mit bis zu 50,- Euro!
>> https://freundschaftswerbung.gmx.de
>> >> > *
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>> >> > *   http://www.ats.ucla.edu/stat/stata/
>> >>
>> >>
>> >>
>> >> --
>> >> Stas Kolenikov, also found at http://stas.kolenikov.name
>> >> Small print: I use this email account for mailing lists only.
>> >>
>> >> *
>> >> *   For searches and help try:
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>> >> *   http://www.stata.com/support/statalist/faq
>> >> *   http://www.ats.ucla.edu/stat/stata/
>> >
>> > --
>> > Kerstin Alfes
>> >
>> > Kettelerweg 24
>> > 57482 Wenden
>> > Germany
>> > Phone: +49-(0)2762-2766
>> > Mobile: +49-(0)174-160 15 44
>> >
>> > Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
>> > belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de
>> > *
>> > *   For searches and help try:
>> > *   http://www.stata.com/help.cgi?search
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>>
>>
>>
>> --
>> Stas Kolenikov, also found at http://stas.kolenikov.name
>> Small print: I use this email account for mailing lists only.
>>
>> *
>> *   For searches and help try:
>> *   http://www.stata.com/help.cgi?search
>> *   http://www.stata.com/support/statalist/faq
>> *   http://www.ats.ucla.edu/stat/stata/
>
> --
> Kerstin Alfes
>
> Kettelerweg 24
> 57482 Wenden
> Germany
> Phone: +49-(0)2762-2766
> Mobile: +49-(0)174-160 15 44
>
> Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir
> belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/

--
Stas Kolenikov, also found at http://stas.kolenikov.name
Small print: I use this email account for mailing lists only.

*
*   For searches and help try:
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*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/
```