Tuesday, January 24, 2012

unique synesthesia?

I met a student who seemed to have a special kind of synesthesia.

Synesthesia is a mixture of sensations in which stimulation of one sensory system arouses automatic and involuntary sensations in another. There are two popular forms: colored-hearing synesthesia and grapheme-color synesthesia. In the former, sounds are experienced with colors when they are heard (e.g., seeing sombody's voice green), while in the latter, letters or numbers are perceived as inherently colored (e.g., the number 5 is red). There are also other forms of synesthesia but what is common to all forms is that there occurs the secondary sensation that is not supposed to be aroused physiologically.

In my student's case, a sight of static objects (people, animals, plants and things in general) induces the visual sensation of geometrical figures. For example, one photograph that I presented as a stimulation aroused him the figures like below.

Most of the figures he 'sees' are abstract and geometrical. There seems to be no similarity between the shapes of objects and the figures he sees. His case is as strange as the case of 'the man who tasted shapes', reported by Richard Cytowic.
[Cytowic, R. (2003). The Man Who Tasted Shapes. MIT Press.]

Moreover, I've never heard of the synesthesia of this form. I am even not sure that this could be the synesthesia or not. If you have any information related to this phenomenon, please let me know. I hope to know if there is a case similar to his.

Sunday, January 15, 2012

Interpersonal Coordination: Matching and Synchrony

People in conversation highly mesh their bodily movements with each other. For instance, turning their gazes on the same object to share attention, showing similar postures or facial expressions when conversing in tune, synchronizing the speed of speaking or voice inflection, mimicking unconsciously the others' gestures. Conversation is not only the exchange of verbal information but also is the embodied interaction. Nonverbal behavior as embodied interaction probably underpin and facilitate the verbal communications.

Bernieri and Rosenthal conceptualize this kind of behavior meshing as 'interpersonal coordination'. Interpersonal coordination is "the degree to which the behaviors in an interaction are nonrandom, patterned, or synchronized in both timing and form". It can be categorized into two basic types: (1) behavior matching and (2) interactional synchrony.
[Bernieri, F. J. & Rosenthal, R. (1991). Interpersonal coordination: behavior matching and interactional synchrony. in Fundamentals of Nonerbal Behavior. Cambridge U. P., pp.401-432.]

1. Behavior matching
Congruence and similarity of physical behavior between interactants. Two people conversing may posture similarly, lean forward and back, or have their arms or legs crossed in the same way. They may appear to be mirrored reflections of each other.

2. Interactional synchrony
Timing aspect of interaction such as shared rhythm, simultaneous movement, and smooth meshing of interaction. Some interactions occur in a rapid fashion, others are slower or more fluid. Based on the shared rhythm, the interactants are entrained to a certain behavioral cycle and show the simultaneous movements in body orientation, postural change, gaze, vocal activity, facial expressions and so forth. This synchronization enables to mesh interactions of each other.

From the phenomenological side, interpersonal coordination in communication might be re-interpreted from the viewpoint of intercorporeality.