Determining synchrony between behavioral time series: An application of surrogate data generation for establishing falsifiable null-hypotheses

Moulder, RG.; Boker, SM; Ramseyer, Fabian; Tschacher, Wolfgang (2018). Determining synchrony between behavioral time series: An application of surrogate data generation for establishing falsifiable null-hypotheses. Psychological methods, 23(4), pp. 757-773. American Psychological Association 10.1037/met0000172

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Synchrony between interacting systems is an important area of nonlinear dynamics in physical systems. Recently psychological researchers from multiple areas of psychology have become interested in nonverbal synchrony (i.e., coordinated motion between two individuals engaged in dyadic information exchange such as communication or dance) as a predictor and outcome of psychological processes. An important step in studying nonverbal synchrony is systematically and validly differentiating synchronous systems from nonsynchronous systems. However, many current methods of testing and quantifying nonverbal synchrony will show some level of observed synchrony even when research participants have not interacted with one another. In this article we demonstrate the use of surrogate data generation methodology as a means of testing new null-hypotheses for synchrony between bivariate time series such as those derived from modern motion tracking methods. Hypotheses generated by surrogate data generation methods are more nuanced and meaningful than hypotheses from standard null-hypothesis testing. We review four surrogate data generation methods for testing for significant nonverbal synchrony within a windowed cross-correlation (WCC) framework. We also interpret the null-hypotheses generated by these surrogate data generation methods with respect to nonverbal synchrony as a specific use of surrogate data generation, which can then be generalized for hypothesis testing of other psychological time series. (PsycINFO Database Record (c) 2018 APA, all rights reserved).

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Translational Research Center
04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy
04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Psychotherapy

UniBE Contributor:

Ramseyer, Fabian and Tschacher, Wolfgang

Subjects:

100 Philosophy
100 Philosophy > 150 Psychology
500 Science
500 Science > 510 Mathematics
600 Technology > 610 Medicine & health

ISSN:

1082-989X

Publisher:

American Psychological Association

Language:

English

Submitter:

Wolfgang Tschacher

Date Deposited:

14 Feb 2019 13:09

Last Modified:

14 Feb 2019 13:09

Publisher DOI:

10.1037/met0000172

PubMed ID:

29595296

URI:

https://boris.unibe.ch/id/eprint/123616

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