We will consider how many variables this actually encompasses and how to design an experiment to isolate the variable of interest. The title of this exercise seems straight forward, but I see it as quite vague. Our experimental design and thus experiments need to eliminate the vagueness. Our experiment could proceed along many lines of questioning and we will decide which lines we will follow. They had been maintained for several weeks on an unrestricted diet of crickets, mealworms, and sugar water.
Empty trays are available.
Bridges between trays are available. We will also have several potential food items which may be interesting to test for ranked preference. Other equipment and supplies may be available upon request. Indeed, we need to decide what our experimental unit is. A variety of analytical tools are available to quantify preference.