Rosalind Ashford helped the group to distinguish themselves from the other girl groups in the label including the pop-oriented Marvelettes and the doo-wop-influenced Supremes with a rougher, brassier gospel-influenced sound. Reeves was a brassy alto while Annette was a deep contralto, and Rosalind was a high soprano. Like the Supremes' Florence Ballard, the Marvelettes' Wanda Rogers and The Four Tops' Abdul "Duke" Fakir, Ashford registered as the high background vocal in Vandellas records. After "Quicksand" gave the group a third top forty pop hit, Beard left to start a family with her new spouse. Reeves recruited a former member of The Velvelettes,
Roberta A. Ballard Ballard spent fifteen years educating herself in a variety of places. From 1957-1961 she was at Earlham College in Richmond, IN, AB. Ballard went on from 1965-1967 receiving her MD at the University of Chicago, School of Medicine in Chicago, IL. Roberta did a Pediatrics Internship from 1965-1967 at the University of Chicago Hospital in Chicago, IL. She would also do a Pediatrics Residency there from 1966-1967. Ballard would then go to Stanford University, Palo, Alto, CA from 1967-1968 doing another Pediatrics Residency. She would then travel to Washington, DC to do a Neonatology Fellowship at George Washington University Hospital