Gesture

Robotics have advanced to include highly anthropomorphic (human-like) entities. A novel eye-tracking paradigm was developed to assess infants’ sensitivity to communicative gestures by human and robotic informants. Infants from two age groups (5-9 months, n = 25; 10-15 months, n = 9) viewed a robotic or human informant pointing to locations where events would occur during experimental trials. Trials consisted of three phases: gesture, prediction, and event. Duration of looking (ms) to two areas of interest, target location and non-target location, was extracted. A series of paired t-tests revealed that only older infants in the human condition looked significantly longer to the target location during the prediction phase (p = .036). Future research is needed to tease apart what components of the robotic hand infants respond to differentially, and whether a robotic hand can be manipulated to increase infants’ sensitivity to social communication gestures executed by said robotic hand.

The role of gestures in determining the use of familiar and novel tools was explored. In the first study, participants were shown gestures for tools corresponding either to tool design, or to the physical affordances of a puzzle designed for each tool. In the second study, two additional conditions were added. In the first, gestures were used that did not correspond to tool design or the puzzle affordances. The second was a control condition in which no gestures were shown. Results indicate that the demonstration of gestures appropriate to a novel problem situation facilitate creative use of tools. Additionally, attention to tool and puzzle affordances is effective for creative tool use when no gestural input is present. However, knowledge of tool design may interfere with this creative application. Performance is further hindered by the demonstration of gestures consistent with tool design, which may prime individuals to rely on the design stance.