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ERIC Number: EJ860094
Record Type: Journal
Publication Date: 2009-Aug
Pages: 20
Abstractor: As Provided
Reference Count: 109
ISSN: ISSN-0096-1523
Spatiotemporal Symmetry and Multifractal Structure of Head Movements during Dyadic Conversation
Ashenfelter, Kathleen T.; Boker, Steven M.; Waddell, Jennifer R.; Vitanov, Nikolay
Journal of Experimental Psychology: Human Perception and Performance, v35 n4 p1072-1091 Aug 2009
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' head movements over short ([approximately equal to]2-s) intervals and a high degree of nonstationarity. Nonstationarity in head movements was found to be positively related to the number of men in a conversation. Surrogate data analysis offsetting the conversants' time series by a large lag was unable to reject the null hypothesis that the observed high peak correlations were unrelated to short-term coordination between conversants. One way that high peak correlations could be observed when 2 time series are offset by a large time lag is for each time series to exhibit self-similarity over a range of scales. Multifractal analysis found small-scale fluctuations to be persistent, [tau](q) less than 0.5, and large-scale fluctuations to be antipersistent, [tau](q) greater than 0.5. These results are consistent with a view that symmetry is formed between conversants over short intervals and that this symmetry is broken at longer, irregular intervals. (Contains 8 tables, 1 footnote, and 9 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A