A researcher wants to know if people’s concerns about the environment vary as a function of incentives provided for recycling. Students living on a university campus are recruited to participate in a study. Some students are randomly assigned to a group in which they are rewarded financially for their recycling efforts for 1 month. The other students are randomly assigned to a group in which they are assessed a fine that is based on the amount of material that they could have, but did not, recycle. 

a. Is this research experimental or correlational? Explain. 

b. Write a hypothesis for this researcher.