The model can be augmented by including additional explanatory variables, which would capture differences in scores among different groups.

Future research will be needed to determine what possible effects this additional variable had on subjects' body weight and brain volume.

And then there is, of course, one additional variable: Ross Perot.

Therefore, an additional variable is added to the equation to take account of this influence.

This suggested that an additional variable would be needed for a complete description of the interface.

Allowing for a change in density brings an additional variable into the analysis.

In the case of a more complex system, additional variables must be measured in order to solve for the complete state.

The 6,652 records that linked on eight additional variables were declared matches without review.

The additional variables greatly complicate calculations of an object's motion.

Spacing of children, parenting style, and gender are additional variables to consider.