One of the principles of psychophysics is that change in the physical environment is not always matched by equal changes perceptually. If Madison Wilson were creating a new drink, what would psychophysics tell her?

What psychophysics will tell madison wilson about creation of a new drink is; She would need to research how the perception of sweetness changed by the amount of sugar added.

We are told from the principles of psychophysics that;

Change in the physical environment is not always matched by equal changes perceptually.

What that means is that sometimes when we there are certain changes to something physical, it may not always be the same with how we perceive such a thing to change.

In context of this question, since she wants to create a new drink, psychophysics  will tell her the perception of the sweetness of the new drink and the actual sweetness depending on the amount of sugar that is added to that drink.

Read more about psychophysics at; link

Explanation:

If Madison Wilson is creating a new drink, the psychophysics will tell her

1. She could make the drink twice as sweet by adding twice the amount of sugar.

2. She would need to research how the perception of "sweetness" changed by the amount of sugar added.

3. She would need to look at the subliminal aspects of "sweetness".

4. She would need to create promotions to tell customers how "sweet" the new drink is.

The psychophysics will want Madison Wilson to research how the perception of "sweetness" changed by the amount of sugar added.