title: Somatosensory driven interpersonal synchrony during rhythmic sway.
abstract: Spontaneous synchrony emerges between individuals performing together rhythmic activities while communicating by means of sensory feedback. In this study, we examined the nature of interpersonal synchrony mediated by light fingertip contact when individuals sway rhythmically in the sagittal plane. The effect of traditional dance expertise on interpersonal synchrony was investigated. Sixty participants (30 dancers, 30 novices) formed three types of couples (10 expert couples, 10 novice couples, 10 mixed couples) and performed a rhythmical sway task (40s) that was either self or metronome paced (frequency: 0.25Hz). Cross spectral analysis of the center of pressure (CoP) displacement signals revealed that during self-paced sway fingertip contact evoked a decrease of the dominant sway frequency difference between partners, an increase in the coherence between the sway signals and a concentration of relative phase angles towards the in-phase (0°-20°) region. In metronome paced sway however, only expert dancers were able to benefit from haptic contact to further improve interpersonal synchrony. These findings suggest that haptic contact can stabilize the spontaneous coordination dynamics of two persons performing rhythmic sway together. The strength of the emerged synchrony depends on the individuals' expertise to integrate tactile and auditory information about sway.
authors: Laboratory of Motor Control and Learning, Department of Physical Education and Sport Sciences, Aristotle University of Thessaloniki, Thessaloniki 541 24, Greece.
authors: George
authors: G
authors: Sofianidis
authors: Vassilia
authors: V
authors: Hatzitaki
authors: George
authors: G
authors: Grouios
authors: Leif
authors: L
authors: Johannsen
authors: Alan
authors: A
authors: Wing
mesh_terms: D000328:Adult; D001307:Auditory Perception; D003615:Dancing / Q000523:psychology*; D005246:Feedback; D005260:Female; D006801:Humans; D007100:Imitative Behavior; D033182:Intention; D007398:Interpersonal Relations; D007699:Kinesthesis; D008297:Male; D009633:Nonverbal Communication; D004856:Postural Balance; D011214:Practice, Psychological; D011434:Proprioception; D014110:Touch; D055815:Young Adult