The Sexual Relationship Power Scale (SRPS) is a 23-item, theoretically based and validated measure of relationship power dynamics. It contains two subscales, which can be used separately or combined, depending upon research requirements. The subscales concern two conceptual dimensions of relationship power: Relationship Control and Decision-Making Dominance. These subscales use variables related to relationship power, including relationship histories of physical or sexual violence ("Has your main partner ever forced you to have sex when you did not want to?"), education level, relationship satisfaction ("All in all, I am satisfied with our relationship."), and current safer sex behaviors (i.e. condom use). A modified version of the SRPS, the SRPS-M, eliminates items related to condom use so that the scale can be used to more accurately predict safer sex behaviors.