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        <entry>20260</entry>
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    <title><string language="fre"><![CDATA[“Quantifying JI” Short talk 1.2: Tommi Himberg - 
Mirroring improvised hand movements in a dyad]]></string></title>
    <language>ENG</language>
    <description>
        <string language="fre"><![CDATA[We studied coordination and movement kinematics in a mirror game. 32 participants (18 f, 14 m; mean age
25.2 years, range 19–37) performed circle­drawing and freely improvised hand movement mirroring tasks in
dyads. The participants were standing face­to­face, right index fingers pointed at each other, fingertips
10–15 cm apart. In turn, one of the participants
was appointed the leader, or the dyad was instructed to share leadership. Hand movements were recorded
using an optical motion capture system. Joint leadership resulted in smoother performances than the
leader–follower condition; the follower participant would often hesitate or correct their movements, resulting
in oscillatory 2–3 Hz jitter. In joint leadership tasks this jitter was 23% lower than in followers (p < 0.01). This
corresponds with the “co­confident
motion” observed in joint leadership mirror task by Noy et al. (2011). In leader­follower tasks the follower
trailed the leader by approximately 0.3 seconds. Joint leadership trials resulted in mutual adaptation, with
both participants “following” each other at similar lags. Windowed analysis revealed that the direction of the
lag varied at sub­second intervals. Hand movements were faster in circle drawing than in free improvisation,
but there were no velocity differences
between the leadership conditions. These findings imply that dyads that share leadership perform smoother
movements and exhibit stronger mutual adaptation than dyads where one participant is externally assigned
as the leader. Our study on coordination of three­dimensional movements extends the scope of previous
dyadic interaction studies that used rhythmic tapping and 1D movements.]]></string></description>
    <keyword><string language="fre"><![CDATA[interaction linguistique]]></string></keyword><keyword><string language="fre"><![CDATA[improvisation]]></string></keyword>
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            <entity><![CDATA[BEGIN:VCARD
VERSION:3.0
CLASS:PUBLIC
REV:2016-09-04 00:02:28
FN:Helena HIRATA
N:HIRATA;Helena;;;

URL;TYPE=work:http://www.canal-u.tv/auteurs/hirata_helena
ROLE:author
TZ:+0200
END:VCARD
]]></entity>
            <date><dateTime>2015-11-04</dateTime></date>
        </contribute>

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    <location><![CDATA[http://www.canal-u.tv/video/site_pouchet_cnrs/quantifying_ji_short_talk_1_2_tommi_himberg_mirroring_improvised_hand_movements_in_a_dyad.20260]]></location>
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    <description>
        <string language="fre"><![CDATA[Droits réservés à l'éditeur et aux auteurs. 
BY NC SA]]></string>
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                        <entry>http://www.canal-u.tv/producteurs/site_pouchet_cnrs/sfl/seminaires/joint_improvisation_meeting_jim_2015</entry>
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                    <description>
                        <string language="fre"><![CDATA[Joint Improvisation Meeting (JIM) 2015]]></string>
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        <value>discipline</value>
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    <taxonPath>
        <source>
        <string language="fre"><![CDATA[Universités Numériques Thématiques 2009 http://www.universites-numeriques.fr]]></string>
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            <id/>
            <entry>
                <string language="fre"/>
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            <string language="eng">DDC 22nd ed.</string>
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                <string language="fre"><![CDATA[Interaction sociale, communication]]></string>
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            <entry>
                <string language="fre"><![CDATA[Danse]]></string>
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