for both the more and less creative window displays. The differences between the window displays only involved the design surrounding the merchandise being more or less creative, not the content. Subjects recruited from the retailer's customer database were randomly assigned to view an image of one of the two window displays. After viewing the image, subjects answered questions about whether the products in the display made them want to enter the store.

What are the explanatory and response variables?

Explanatory variable$($s$)$