Ten subjects watched series of eight digits and attempted to recall each series immediately after they had been presented. They were also required to rehearse aloud while the digits were being presented. Recordings from a throat microphone permitted accurate measurement of the timing of rehearsal. Six subjects rehearsed cumulatively, repeating all previous digits each time a new one appeared, at least up until presentation of the sixth. The other four subjects simply called out each digit one at a time in rehearsal; three of these subjects appeared to ‘group’ the digits. These rehearsal strategies are discussed, particularly in relation to serial position effects and to the serial ordering of recall.