Thus, this term along with P(o t | c) yields the highest likelihood when observing a gesture performance with exactly the same movement trajectory and velocity as the one represented in the own motor repertoire.
That is, the agent does not need to specify the start and end point of gestures, but can recognize gestures that were started at a later point of a trajectory, e.g., in the case of several successive gestures without intermediate rest position, or when observing a gesture partially.
One idea is that this correspondence is established at the level of single neurons that are active when the individual performs a particular gesture or observes a similar gesture performed by another individual.
Mikulica [36] observed a threat gesture involving swinging the head in Southern whites (in three individuals out of five), but not in Northern whites (six individuals).
However, the decision between observing a new gesture performance or a familiar one cannot be made only on the basis of the posterior probabilities of all hypotheses, i.e., all familiar gestures, whose sum at each time step is 1.
As mentioned in "Shared Motor Knowledge", in the case of observing an unfamiliar gesture, which cannot be predicted confidently, the performance will be learned through the inverse models.
Observing an unfamiliar gesture will assign the highest probability to the most similar motor program, despite of high deviations in performance.
Subjects either had to use a simple tool, solve a simple but not obvious problem by observing a demonstrated solution, gesture to the experimenter or follow the experimenter's gaze direction.
We hypothesized that if information picked up from communicative interaction is used to predict the partner's response, then observing A's communicative gesture should enhance visual discrimination of agent B. Participants were 23 undergraduate psychology students from the University of Leuven (5 male and 18 female, mean age = 21.1 years).
The functional MRI experiment was designed in a 2 × 3 factorial design, the first factor being the participant's task [the participant was either asked to express a given facial gesture ('do') or to observe the facial gesture shown by the actor ('view')] and the second factor being the type of facial gesture (neutral, kiss or smile) that was to be executed or observed.
Use a mirror to observe how you gesture as you speak.
