“…It is very unlikely to find any mechanism that is shared by all these capacities. Indeed, the role of gestures is usually discussed in the context of the investigation of spatial problem solving (Chu & Kita, ; Freksa et al, ; Hostetter & Alibali, ), that is, of the cognitive capacity for solving spatial problems (the input is “being presented with a spatial problem,” the output is “presenting a solution”). As manifestations of this capacity, researchers investigate behaviors with respect to, for example, mental rotation tasks, route learning tasks, or rotating gear tasks.…”