“…Computer scientists commonly use this method, because their objective is not to find optimal gestures but only to find novel gestures that are recognizable accurately. Many examples exist in the literature (Bailly, Müller, & Lecolinet, 2012;Bau & Mackay, 2008;Baudisch & Chu, 2009;Derboven, De Roeck, & Verstraete, 2012;Keefe et al, 2012;Lepinski, Grossman, & Fitzmaurice, 2010;Liao, Liu, Liew, & Wilcox, 2010;Matejka, Grossman, Lo, & Fitzmaurice, 2009;Motamedi, 2008;Moyle & Cockburn, 2003;Olwal, Feiner, & Heyman, 2008;Roth & Turner, 2009;Roudaut, Lecolinet, & Guiard, 2009;Wang & Ren, 2009;Wu & Balakrishnan, 2003;Yatani, Partridge, Bern, & Newman, 2008) With the specificity method, however, it is difficult to guarantee generality of the designed gestures, because gesture design is based on the designer's subjective opinion. Thus, the design process is usually followed by a user evaluation to ensure that the designed gestures are also familiar or effective to end users.…”