Terri Orbuch and Joseph Veroff (2002) monitored newlywed couples using self-reports over a long period (a longitudinal study). Participants are required to provide extensive reports about the natures and the statuses of their relationships. Although many of the marriages have ended since the beginning of the study, this type of relationship study allows researchers to track marriages from start to finish by conducting follow-up interviews with the participants in order to determine which factors are associated with marriages that last and which with those that do not. Though the field of relationship science is still relatively young, research conducted by researchers from many different disciplines continues to broaden the field.