## How to interpret good path coefficients and total effect but low f square?

Frequently asked questions about PLS path modeling.
rebeccachan1111
PLS Junior User
Posts: 6
Joined: Sat Oct 26, 2019 12:50 am
Real name and title: Rebecca (research student)

### How to interpret good path coefficients and total effect but low f square?

Hi all
I have a construct which is shown to have low (0.015) f square to a DV. However the path coefficients from pointing that construct to the DV, directly and indirectly, are significant and the total effect of that construct to the DV is actually high. As f square essentially measures the impact to a DV with and without a particular IV, how can I interpret this seemingly contradicting result? If the total effect is high, taking out that construct should have significant impact (higher f2) to that DV?

jmbecker
SmartPLS Developer
Posts: 1094
Joined: Tue Mar 28, 2006 11:09 am
Real name and title: Dr. Jan-Michael Becker

### Re: How to interpret good path coefficients and total effect but low f square?

The relative impact may be large, but if you omit the construct other construct will take its role and explain the same variance in the dependent construct. This is likely due to some (high) collinearity between the variables.
Dr. Jan-Michael Becker, University of Cologne, SmartPLS Developer
Researchgate: https://www.researchgate.net/profile/Jan_Michael_Becker

rebeccachan1111
PLS Junior User
Posts: 6
Joined: Sat Oct 26, 2019 12:50 am
Real name and title: Rebecca (research student)

### Re: How to interpret good path coefficients and total effect but low f square?

Thanks Dr Becker, that explains it and makes sense.

RandellD
PLS Junior User
Posts: 1
Joined: Sat Nov 16, 2019 10:02 am
Real name and title: Randell

### Re: How to interpret good path coefficients and total effect but low f square?

How high collinearity are we talking here exactly, Dr Becker?