The phrase "added the interaction of" is correct and usable in written English.
It can be used when discussing the inclusion of a specific interaction or relationship between variables in a study or analysis.
Example: "In our analysis, we added the interaction of age and income to better understand the impact on spending behavior."
Alternatives: "included the interaction of" or "incorporated the interaction of".
However, adding the interaction of group by engagement rating did not increase the model's predictiveness; indeed, the adjusted R2 was reduced by 0.01.
In the untabulated test, we add the interaction of E-index and board size and the percentage of independent directors, but the coefficients on these interaction terms are insignificant.
We therefore add the interaction of income deprivation with beds price to the model.
Changes in effect size over time will be evaluated by adding the interaction of assessment and treatment group to the model.
In Model 5, we added the interaction terms of urban/rural areas with the number of children based on Model 4. The effects of the number of children aged 0 have no significant differences between urban and rural areas, but the effects for those aged 1 to 5, those aged 3 to 12, and children aged 13 and older are all significantly different.
There are four models in this table; these consider treatment regimen, site, treatment regimen, and site, and adding the interaction terms of the two factors in each of Models 1, 2, 3, and 4 separately.
In model (3), the interaction term of excess cash remains be negative after adding the interaction terms of the E-index with pension ownership and industry competition.
We further add the interaction effect of excess cash in models (5 - 8).
If the interaction term was significant (P < 0.05) it was tested whether adding the interaction with square of gestational age was significant.
Model 1 includes only main effect predictors; model 2 adds the interaction term between percentage of female authors and percentage of international authors.
