Stephens, Atkins, and Kingston XXXXXXXXXXconducted an experiment in which participants were able to tolerate more pain when they were shouting their favorite swear words than when they were shouting...

Stephens, Atkins, and Kingston (2009) conducted an experiment in which participants were able to tolerate more pain when they were shouting their favorite swear words than when they were shouting neutral words. Identify the independent and dependent variables for this study.