Spatiotemporal symmetry and multifractal structure of head movements during dyadic conversation.

• DOI: 10.1037/a0015017
• Publication Date: 2009-08-04T16:16:03Z
• Authors: Kathleen T. Ashen...; Steven M. Boker; Jennifer R. Waddell; Nikolay Vitanov
• Keywords: Multifractal system

This study examined the influence of sex, social dominance, and context on motion-tracked head movements during dyadic conversations. Windowed cross-correlation analyses found high peak correlation between conversants' over short ( approximately 2-s) intervals a degree nonstationarity. Nonstationarity in was to be positively related number men conversation. Surrogate data analysis offsetting time series by large lag unable reject null hypothesis that observed correlations were unrelated short-term coordination conversants. One way could when 2 are offset is for each exhibit self-similarity range scales. Multifractal small-scale fluctuations persistent, tau(q) < 0.5, large-scale antipersistent, > 0.5. These results consistent with view symmetry formed conversants this broken at longer, irregular intervals.