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Hi -- I am running an analysis where type=complex, and where I am also modeling a specific indirect pathway. However I would also like to see an estimate of (and significance testing for) the direct effect that remains between my DV and IV after the indirect effect is accounted for. However even though the output header says "TOTAL, TOTAL INDIRECT, SPECIFIC INDIRECT, AND DIRECT EFFECTS" it is only giving me the sum of indirect effects and my specific indirect effect. What do I need to do to get the direct effect included in the output? Many thanks! |
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See page 691 of the user's guide. The last paragraph of MODEL INDIRECT shows the specification to use. |
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Hi Dr. Muthen -- That last paragraph is exactly what I'm already using -- here is my current code: Names are ID, FA, Fabinary, PK, subject, Hardeasy, Context; Usevariables are ID, FA, subject, Hardeasy, PK; subpopulation = (context EQ 1); cluster is id; analysis: type is complex; model: PK on subject Hardeasy; FA on subject PK Hardeasy; model indirect: FA via pk hardeasy; But the output gives me no estimates of the direct effect. As I stated, it only gives me the sum of indirect effects and the one I specify. Many thanks for your help! |
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VIA is an indirect effect option. To get all effects, use FA IND hardeasy; |
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Hi Bengt -- Unfortunately that didn't seem to solve the problem :-( Should I send you the dataset and input file to see if you replicate? I don't know if I'm missing something, but it seems like if the direct effect was there it would be clearly labeled, correct? Here is what my output looks like: TOTAL, TOTAL INDIRECT, SPECIFIC INDIRECT, AND DIRECT EFFECTS Effects from HARDEASY to FA Sum of indirect Specific indirect FA PK HARDEASY After that it just repeats the same for the standardized variables... |
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Please send the output and your license number to support@statmodel.com. |
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Timothy posted on Monday, July 04, 2016 - 5:09 am
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Hi Linda, I experienced the same problem (without the direct effect in the output file). I also used the "IND" command as you suggested and repeated the same problem as Emily did. Can you help me to get the direct effects estimates? Thanks a lot. |
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Usually when you don't get the indirect effects it is because the components of the indirect effect are not present in your model. If this does not help, send your output and license number to support@statmodel.com. |
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fred posted on Saturday, November 04, 2017 - 11:58 am
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Hi, Strangely enough I am not getting any direct effect estimates in my output of a fairly straight forward analysis. The model is: model: Mediator by c1-c6; C2 WITH C1; Mediator on Pred cohab age; Outcome on Pred Mediator age; model indirect: Outcome ind Mediator Pred; The output has only indirect effect listed: TOTAL, TOTAL INDIRECT, SPECIFIC INDIRECT, AND DIRECT EFFECTS Two-Tailed Estimate S.E. Est./S.E. P-Value Effects from PRED to OUTCOME Indirect 0.035 0.012 3.054 0.002 |
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Drop "Mediator" from your Model Indirect statement. |
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fred posted on Saturday, November 04, 2017 - 4:47 pm
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Thank you! Is this because there is only a single mediator? |
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No, it's just a convention. See the UG. |
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