In order to determine the ability of people to distinguish dialect, a separate experiment was conducted.

There are also reports from the 17th and 18th centuries describing separate experiments exploring the function of the ear drum.

This was also proved by another, separate experiment.

This conclusion was based on sophisticated but completely separate experiments.

All data shown are representative of those obtained in at least three separate experiments, with similar results.

The absence of inhibiting components was confirmed in a separate experiment.

This was tested in three separate experiments by Laughlin and colleagues.

In the North Atlantic, there are not nearly enough separate natural experiments to achieve that aim.

The Janus tests included more than 40 separate experiments and would continue for 13 years.

In your situation, it might be more straight-forward to do two separate experiments: a one- versus two-stage process, and see if you have a difference.