Sixteen juvenile rats were treated with the drug Naloxone (pairs 1,3,7,8) or, as a placebo control, Saline (pairs 2,4,5,6) and then observed for their play and non-play behavior in an open field for 1.5 minutes. The goal of the research was to test the idea that the inhibition of endogenous opioid neuro-transmission (this is what naloxone does) will reduce play behavior, but have no effect on other social or non-social behaviors.

A) Write a research hypothesis for this experiment.

B) Write a null hypothesis for this experiment.

C) Write 1 alternative (research) hypothesis for this experiment. (Note: you cannot use a behaving that is part of your research hypothesis or null hypothesis for the alternative.).