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Differing Dynamics of Intrapersonal and Interpersonal Coordination: Two-finger and Four-Finger Tapping Experiments.

Kodama K, Furuyama N, Inamura T - PLoS ONE (2015)

Bottom Line: Some results did not agree with the HKB model predictions.First, from Experiment 1, no significant difference was observed in the movement stability between the in-phase and anti-phase modes in the two finger condition.Second, from Experiment 2, no significant difference was found in the movement stability between the in-phase and anti-phase mode in the four-finger condition.

View Article: PubMed Central - PubMed

Affiliation: Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, Yokohama-shi, Kanagawa-ken, Japan.

ABSTRACT
Finger-tapping experiments were conducted to examine whether the dynamics of intrapersonal and interpersonal coordination systems can be described equally by the Haken-Kelso-Bunz model, which describes inter-limb coordination dynamics. This article reports the results of finger-tapping experiments conducted in both systems. Two within-subject factors were investigated: the phase mode and the number of fingers. In the intrapersonal experiment (Experiment 1), the participants were asked to tap, paced by a gradually hastening auditory metronome, looking at their fingers moving, using the index finger in the two finger condition, or the index and middle finger in the four-finger condition. In the interpersonal experiment (Experiment 2), pairs of participants performed the task while each participant used the outside hand, tapping with the index finger in the two finger condition, or the index and middle finger in the four-finger condition. Some results did not agree with the HKB model predictions. First, from Experiment 1, no significant difference was observed in the movement stability between the in-phase and anti-phase modes in the two finger condition. Second, from Experiment 2, no significant difference was found in the movement stability between the in-phase and anti-phase mode in the four-finger condition. From these findings, different coordination dynamics were inferred between intrapersonal and interpersonal coordination systems against prediction from the previous studies. Results were discussed according to differences between intrapersonal and interpersonal coordination systems in the availability of perceptual information and the complexity in the interaction between limbs derived from a nested structure.

No MeSH data available.


Experimental setup of Experiment 1.Experimental setup of an intrapersonal experiment.
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pone.0129358.g002: Experimental setup of Experiment 1.Experimental setup of an intrapersonal experiment.

Mentions: Each participant was seated at a desk in front of a camcorder (TK-C1380; Victor Co. Ltd.) wearing an over-the-ear noise-canceling headphone (MDR-NC600D; Sony Corp.). A computer-generated metronome produced beeps, each lasting 85 ms. The metronome frequency was increased gradually from 1 Hz to 3 Hz over a 30 s trial after an initial 3 s period at 1 Hz. The metronome was run on a personal computer (MacBook2130/13.3; Apple Computer Inc.). The beep sounds were conveyed to participants through headphones at a comfortable volume that was adjusted for each participant. A camcorder, as part of the motion analyzer system (Frame-DIAS II; DKH), videotaped the participants’ index finger movements at 60 fields per second (60 Hz) through the two-dimensional motion capture function of the Frame-DIAS II system. Tapping movements and auditory stimuli were recorded simultaneously on a hard disk drive (HDD). Fig 2 portrays the experimental setup of Experiment 1.


Differing Dynamics of Intrapersonal and Interpersonal Coordination: Two-finger and Four-Finger Tapping Experiments.

Kodama K, Furuyama N, Inamura T - PLoS ONE (2015)

Experimental setup of Experiment 1.Experimental setup of an intrapersonal experiment.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4466560&req=5

pone.0129358.g002: Experimental setup of Experiment 1.Experimental setup of an intrapersonal experiment.
Mentions: Each participant was seated at a desk in front of a camcorder (TK-C1380; Victor Co. Ltd.) wearing an over-the-ear noise-canceling headphone (MDR-NC600D; Sony Corp.). A computer-generated metronome produced beeps, each lasting 85 ms. The metronome frequency was increased gradually from 1 Hz to 3 Hz over a 30 s trial after an initial 3 s period at 1 Hz. The metronome was run on a personal computer (MacBook2130/13.3; Apple Computer Inc.). The beep sounds were conveyed to participants through headphones at a comfortable volume that was adjusted for each participant. A camcorder, as part of the motion analyzer system (Frame-DIAS II; DKH), videotaped the participants’ index finger movements at 60 fields per second (60 Hz) through the two-dimensional motion capture function of the Frame-DIAS II system. Tapping movements and auditory stimuli were recorded simultaneously on a hard disk drive (HDD). Fig 2 portrays the experimental setup of Experiment 1.

Bottom Line: Some results did not agree with the HKB model predictions.First, from Experiment 1, no significant difference was observed in the movement stability between the in-phase and anti-phase modes in the two finger condition.Second, from Experiment 2, no significant difference was found in the movement stability between the in-phase and anti-phase mode in the four-finger condition.

View Article: PubMed Central - PubMed

Affiliation: Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, Yokohama-shi, Kanagawa-ken, Japan.

ABSTRACT
Finger-tapping experiments were conducted to examine whether the dynamics of intrapersonal and interpersonal coordination systems can be described equally by the Haken-Kelso-Bunz model, which describes inter-limb coordination dynamics. This article reports the results of finger-tapping experiments conducted in both systems. Two within-subject factors were investigated: the phase mode and the number of fingers. In the intrapersonal experiment (Experiment 1), the participants were asked to tap, paced by a gradually hastening auditory metronome, looking at their fingers moving, using the index finger in the two finger condition, or the index and middle finger in the four-finger condition. In the interpersonal experiment (Experiment 2), pairs of participants performed the task while each participant used the outside hand, tapping with the index finger in the two finger condition, or the index and middle finger in the four-finger condition. Some results did not agree with the HKB model predictions. First, from Experiment 1, no significant difference was observed in the movement stability between the in-phase and anti-phase modes in the two finger condition. Second, from Experiment 2, no significant difference was found in the movement stability between the in-phase and anti-phase mode in the four-finger condition. From these findings, different coordination dynamics were inferred between intrapersonal and interpersonal coordination systems against prediction from the previous studies. Results were discussed according to differences between intrapersonal and interpersonal coordination systems in the availability of perceptual information and the complexity in the interaction between limbs derived from a nested structure.

No MeSH data available.