Second order model

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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alialashwal
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Joined: Wed Jul 20, 2011 9:58 am
Real name and title: Alashwal, A.M.

Second order model

Post by alialashwal »

Hello everybody,

Please correct me if i'm wrong. My model is a reflective second order model. To build the second order model i assigned the same manifest variables of the first order constructs. For instance, there are 5 variables measure INTEGRATION, 3 variables measure DoD, 4 variables measure BOUNDARIES, and 3 variables measure KNOWLEDGE SPANNING. All these constructs are influenced by FRAG. that is the second order construct.

So to run the model, i assigned all the manifest variables (15 variables) to FRAG. It works, but there is one problem related to AVE of FRAG. It is always small because the correlation between these variable is low.

The question is what to do in this case, do i have to eliminate the weak variables from FRAG (loading less than .5). In this case do you think that will effect the whole model? OR do i have to accept the results of AVE as it is?

Thanks
Ali M. Alashwal, PhD
Faculty of Built Environment,
University of Malaya,
50603, Kuala Lumpur, Malaysia.
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Diogenes
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Post by Diogenes »

Hi,

The AVE of the 2nd order LV are underestimated by SmartPLS,
viewtopic.php?t=640

Did you compute it by hand?
viewtopic.php?p=5297#5297

Excluding one LV could jeopardize the content validity.

Best regards,

Bido
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