Conférence
Notice
Lieu de réalisation
Site Pouchet - CNRS
Langue :
Anglais
Crédits
Helena Sumiko Hirata (Intervention)
Détenteur des droits
GUIFFARD Thomas
DOI : 10.60527/w2xp-y396
Citer cette ressource :
Helena Sumiko Hirata. CNRS_Pouchet. (2015, 4 novembre). “Quantifying JI” Short talk 1.2: Tommi Himberg - Mirroring improvised hand movements in a dyad , in Joint Improvisation Meeting (JIM) 2015. [Vidéo]. Canal-U. https://doi.org/10.60527/w2xp-y396. (Consultée le 18 mai 2024)

“Quantifying JI” Short talk 1.2: Tommi Himberg - Mirroring improvised hand movements in a dyad

Réalisation : 4 novembre 2015 - Mise en ligne : 25 janvier 2016
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Descriptif

We studied coordination and movement kinematics in a mirror game. 32 participants (18 f, 14 m; mean age25.2 years, range 19–37) performed circle­drawing and freely improvised hand movement mirroring tasks indyads. The participants were standing face­to­face, right index fingers pointed at each other, fingertips10–15 cm apart. In turn, one of the participantswas appointed the leader, or the dyad was instructed to share leadership. Hand movements were recordedusing an optical motion capture system. Joint leadership resulted in smoother performances than theleader–follower condition; the follower participant would often hesitate or correct their movements, resultingin oscillatory 2–3 Hz jitter. In joint leadership tasks this jitter was 23% lower than in followers (p < 0.01). Thiscorresponds with the “co­confidentmotion” observed in joint leadership mirror task by Noy et al. (2011). In leader­follower tasks the followertrailed the leader by approximately 0.3 seconds. Joint leadership trials resulted in mutual adaptation, withboth participants “following” each other at similar lags. Windowed analysis revealed that the direction of thelag varied at sub­second intervals. Hand movements were faster in circle drawing than in free improvisation,but there were no velocity differencesbetween the leadership conditions. These findings imply that dyads that share leadership perform smoothermovements and exhibit stronger mutual adaptation than dyads where one participant is externally assignedas the leader. Our study on coordination of three­dimensional movements extends the scope of previousdyadic interaction studies that used rhythmic tapping and 1D movements.

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