Full metadata
Title
Leader-follower dynamics anisotropic coupling and influence in social coordination
Description
The current work investigated the emergence of leader-follower roles during social motor coordination. Previous research has presumed a leader during coordination assumes a spatiotemporally advanced position (e.g., relative phase lead). While intuitive, this definition discounts what role-taking implies. Leading and following is defined as one person (or limb) having a larger influence on the motor state changes of another; the coupling is asymmetric. Three experiments demonstrated asymmetric coupling effects emerge when task or biomechanical asymmetries are imputed between actors. Participants coordinated in-phase (Ф =0o) swinging of handheld pendulums, which differed in their uncoupled eigenfrequencies (frequency detuning). Coupling effects were recovered through phase-amplitude modeling. Experiment 1 examined leader-follower coupling during a bidirectional task. Experiment 2 employed an additional coupling asymmetry by assigning an explicit leader and follower. Both experiment 1 and 2 demonstrated asymmetric coupling effects with increased detuning. In experiment 2, though, the explicit follower exhibited a phase lead in nearly all conditions. These results confirm that coupling direction was not determined strictly by relative phasing. A third experiment examined the question raised by the previous two, which is how could someone follow from ahead (i.e., phase lead in experiment 2). This was tested using a combination of frequency detuning and amplitude asymmetry requirements (e.g., 1:1 or 1:2 & 2:1). Results demonstrated larger amplitude movements drove the coupling towards the person with the smaller amplitude; small amplitude movements exhibited a phase lead, despite being a follower in coupling terms. These results suggest leader-follower coupling is a general property of social motor coordination. Predicting when such coupling effects occur is emphasized by the stability reducing effects of coordinating asymmetric components. Generally, the implication is role-taking is an emergent strategy of dividing up coordination stabilizing efforts unequally between actors (or limbs).
Date Created
2015
Contributors
- Fine, Justin (Author)
- Amazeen, Eric L. (Thesis advisor)
- Amazeen, Polemnia G. (Committee member)
- Brewer, Gene (Committee member)
- Santello, Marco (Committee member)
- Arizona State University (Publisher)
Topical Subject
Resource Type
Extent
ix, 91 pages : illustrations
Language
eng
Copyright Statement
In Copyright
Primary Member of
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.34755
Statement of Responsibility
by Justin Fine
Description Source
Viewed on November 17, 2015
Level of coding
full
Note
thesis
Partial requirement for: Ph. D., Arizona State University, 2015
bibliography
Includes bibliographical references (pages 62-68)
Field of study: Psychology
System Created
- 2015-08-17 11:48:44
System Modified
- 2021-08-30 01:28:01
- 3 years 3 months ago
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