Study 1: participants come to the lab and are placed in individual cubicles and told they can either put on pajamas or undress and stay nude. They are then given enough money to order a pizza and told that they should tip the delivery guy using their own money. We then compare the mean tip level of those who chose to wear pajamas to those who decided to go nude.
Study 2: participants come to the lab on day 1 and are told to change into pajamas. They are then given enough money to order a pizza and told that they should tip the delivery guy with their own money. On day 2, they are told to simply undress and again, order a pizza tipping the driver with their own money. To rule out order effects, half of the participants in study 2 are nude on day 1 and pajama-d on day 2 [methodological note: this strategy is called counterbalancing]. We then compare the mean tipping levels across the day when they were nude to the day when they were pajama-d.These are fabulous research ideas! Now all we need are a grant. Since Domino's philanthropic efforts are pretty much focused on religion, we'll have to go somewhere else. If you or any foundation you know would be willing to fund/conduct this study, please contact us here at JFW immediately.