An accelerated Master’s degree option is an explicit arrangement of graduate admissions and courses and other requirements to enable a student to complete the requirements for a baccalaureate degree and a specified Master’s degree in less calendar time than would be required through normal sequential enrollment. Although such arrangements are sometimes referred to as “five-year” programs, “4+1 programs,” or “combined bachelor’s/Master’s programs,” it is important to keep in mind that they do not refer to a distinct or different kind of degree program. The reduction in calendar time does not result from a reduction in content. The requirements for the bachelor’s and Master’s degrees remain unchanged; what changes is how they are organized.
For more information from the UMass Graduate School link here.