“…From this perspective, individual differences in WM capacity do not exclusively reflect differences in the number of slots, rather they reveal how efficiently this storage capacity is used, which mainly depends on how well the items gaining access to WM can be voluntarily controlled (Awh & Vogel, 2008). Because of this mechanism, variance in WM capacity is partially caused by individual differences in executive attention processes (Engle, 2002;Kane, Bleckley, Conway, & Engle, 2001). This viewpoint is supported by multiple studies that suggest a tight link between memory capacity and control of attention.…”