... purposes) the subject's predetermined (seated) digit span. Uponreciting the final digit in the string, the examiner initiatedCOP recording, and the subject repeated the digit stringaloud ... discussed.IntroductionOver the last two decades, dual task studies examining the role of attention in postural control have become increas-ingly important in clinical neuroscience [1,2], engineering[3], ... even in the absence of a changing attentional demand [9,11]. Whether the mechanical influence of vocalization extends to the tem-poral structure of COP variability remains unclear.Were the changes...