Interaction effect

Questions about the implementation and application of the PLS-SEM method, that are not related to the usage of the SmartPLS software.
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Choukri
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Interaction effect

Post by Choukri »

Hi everyone,

To test a moderating effect, is it normal to use Product indicator (calculation method) with standardized (product term generation)?

Thank you
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cringle
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Re: Interaction effect

Post by cringle »

We suggest using the two stage approach or the orthog. aprroach (with stand. data).
Choukri
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Re: Interaction effect

Post by Choukri »

Hi,

Thank you for your response

Henseler and Chin (2010, p. 82) indicated that ((For prediction accuracy, the orthogonalizing and the product indicator approach provide a significantly and substantially more accurate prediction than the other two approaches. Among these two, the orthogonalizing approach should be used in case of small sample size and few indicators per construct. If the sample size or the number of indicators per construct is medium to large, the product indicator approach should be used.))

According to the last sentence, my sample size is large (N= 443), and the indicators per constructs are between 4 to 7.

Does this mean that I shoud keep using the product indicator approach or it is better to switch to the orthogonalizing approach?

Greetings
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cringle
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Re: Interaction effect

Post by cringle »

hi

the article also states some advantage of the two stage approach. again, i would either use the two stage or the orthog. approach.

best
cr
jmbecker
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Re: Interaction effect

Post by jmbecker »

Moreover, results change if you have formative constructs in your model. Two stage approach especially gets better if formative constructs are included in your model.
Dr. Jan-Michael Becker, BI Norwegian Business School, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker
GoogleScholar: http://scholar.google.de/citations?user ... AAAJ&hl=de
Choukri
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Joined: Thu Apr 16, 2015 2:11 pm
Real name and title: Choukri MENIDJEL

Re: Interaction effect

Post by Choukri »

Thank you for your response

My model does not includ formative constructs. All constructs are reflective.

What should I do?

Greetings
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