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Fourie E, Lu SC, Delafield-Butt J, Rivera SM. Motor Control Adherence to the Two-thirds Power Law Differs in Autistic Development. J Autism Dev Disord 2024:10.1007/s10803-024-06240-6. [PMID: 38280136 DOI: 10.1007/s10803-024-06240-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/08/2024] [Indexed: 01/29/2024]
Abstract
Autistic individuals often exhibit motor atypicalities, which may relate to difficulties in social communication. This study utilized a smart tablet activity to computationally characterize motor control by testing adherence to the two-thirds power law (2/3 PL), which captures a systematic covariation between velocity and curvature in motor execution and governs many forms of human movement. Children aged 4-8 years old participated in this study, including 24 autistic children and 33 typically developing children. Participants drew and traced ellipses on an iPad. We extracted data from finger movements on the screen, and computed adherence to the 2/3 PL and other kinematic metrics. Measures of cognitive and motor functioning were also collected. In comparison to the typically developing group, the autistic group demonstrated greater velocity modulation between curved and straight sections of movement, increased levels of acceleration and jerk, and greater intra- and inter-individual variability across several kinematic variables. Further, significant motor control development was observed in typically developing children, but not in those with autism. This study is the first to examine motor control adherence to the 2/3 PL in autistic children, revealing overall diminished motor control. Less smooth, more varied movement and an indication of developmental stasis in autistic children were observed. This study offers a novel tool for computational characterization of the autism motor signature in children's development, demonstrating how smart tablet technology enables accessible assessment of children's motor performance in an objective, quantifiable and scalable manner.
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Affiliation(s)
- Emily Fourie
- Department of Psychology, University of California, Davis, Davis, CA, USA.
- Center for Mind and Brain, University of California, Davis, Davis, CA, USA.
| | - Szu-Ching Lu
- Laboratory for Innovation in Autism, University of Strathclyde, Glasgow, Scotland, UK
- Strathclyde Institute of Education, University of Strathclyde, Glasgow, Scotland, UK
| | - Jonathan Delafield-Butt
- Laboratory for Innovation in Autism, University of Strathclyde, Glasgow, Scotland, UK
- Strathclyde Institute of Education, University of Strathclyde, Glasgow, Scotland, UK
| | - Susan M Rivera
- Department of Psychology, University of California, Davis, Davis, CA, USA
- Center for Mind and Brain, University of California, Davis, Davis, CA, USA
- College of Behavioral and Social Sciences, University of Maryland, College Park, MD, USA
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Narrative as co-regulation: A review of embodied narrative in infant development. Infant Behav Dev 2022; 68:101747. [PMID: 35839557 DOI: 10.1016/j.infbeh.2022.101747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 07/01/2022] [Accepted: 07/03/2022] [Indexed: 11/21/2022]
Abstract
We review evidence of non-verbal, embodied narratives in human infancy to better understand their form and function as generators of common experience, regulation, and learning. We examine their development prior to the onset of language, with a view to improve understanding of narrative as regular motifs or schemas of early experience in both solitary and social engagement. Embodied narratives are composed of regular patterns of interest, arousal, affect, and intention that yield a characteristic four-part structure of (i) introduction, (ii) development, (iii) climax, and (iv) resolution. Made with others these form co-created shared acts of meaning, and are parsed in time with discreet beginnings and endings that allow a regular pattern to frame and give predictive understanding for prospective regulation (especially important within social contexts) that safely returns to baseline again. This characteristic pattern, co-created between infant and adult from the beginning of life, allows the infant to contribute to, and learn, the patterns of its culture. We conclude with a view on commonalities and differences of co-created narrative in non-human primates, and discuss implications of disruption to narrative co-creation for developmental psychopathology.
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Daniel S, Wimpory D, Delafield-Butt JT, Malloch S, Holck U, Geretsegger M, Tortora S, Osborne N, Schögler B, Koch S, Elias-Masiques J, Howorth MC, Dunbar P, Swan K, Rochat MJ, Schlochtermeier R, Forster K, Amos P. Rhythmic Relating: Bidirectional Support for Social Timing in Autism Therapies. Front Psychol 2022; 13:793258. [PMID: 35693509 PMCID: PMC9186469 DOI: 10.3389/fpsyg.2022.793258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 03/23/2022] [Indexed: 11/13/2022] Open
Abstract
We propose Rhythmic Relating for autism: a system of supports for friends, therapists, parents, and educators; a system which aims to augment bidirectional communication and complement existing therapeutic approaches. We begin by summarizing the developmental significance of social timing and the social-motor-synchrony challenges observed in early autism. Meta-analyses conclude the early primacy of such challenges, yet cite the lack of focused therapies. We identify core relational parameters in support of social-motor-synchrony and systematize these using the communicative musicality constructs: pulse; quality; and narrative. Rhythmic Relating aims to augment the clarity, contiguity, and pulse-beat of spontaneous behavior by recruiting rhythmic supports (cues, accents, turbulence) and relatable vitality; facilitating the predictive flow and just-ahead-in-time planning needed for good-enough social timing. From here, we describe possibilities for playful therapeutic interaction, small-step co-regulation, and layered sensorimotor integration. Lastly, we include several clinical case examples demonstrating the use of Rhythmic Relating within four different therapeutic approaches (Dance Movement Therapy, Improvisational Music Therapy, Play Therapy, and Musical Interaction Therapy). These clinical case examples are introduced here and several more are included in the Supplementary Material (Examples of Rhythmic Relating in Practice). A suite of pilot intervention studies is proposed to assess the efficacy of combining Rhythmic Relating with different therapeutic approaches in playful work with individuals with autism. Further experimental hypotheses are outlined, designed to clarify the significance of certain key features of the Rhythmic Relating approach.
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Affiliation(s)
- Stuart Daniel
- British Association of Play Therapists, London, United Kingdom
| | - Dawn Wimpory
- BCU Health Board (NHS), Bangor, United Kingdom
- School of Human and Behavioural Sciences, Bangor University, Bangor, United Kingdom
| | - Jonathan T. Delafield-Butt
- Laboratory for Innovation in Autism, University of Strathclyde, Glasgow, United Kingdom
- School of Education, University of Strathclyde, Glasgow, United Kingdom
| | - Stephen Malloch
- Westmead Psychotherapy Program, School of Medicine, University of Sydney, Sydney, NSW, Australia
- MARCS Institute for Brain, Behaviour and Development, Western Sydney University, Sydney, NSW, Australia
| | - Ulla Holck
- Music Therapy, Department of Communication and Psychology, Aalborg University, Aalborg, Denmark
| | - Monika Geretsegger
- The Grieg Academy Music Therapy Research Centre, NORCE Norwegian Research Centre, Bergen, Norway
| | - Suzi Tortora
- Dancing Dialogue, LCAT, New York, NY, United States
| | - Nigel Osborne
- Department of Music, University of Edinburgh, Edinburgh, United Kingdom
| | - Benjaman Schögler
- Perception Movement Action Research Consortium, University of Edinburgh, Edinburgh, United Kingdom
| | - Sabine Koch
- Research Institute for Creative Arts Therapies, Alanus University, Alfter, Germany
- School of Therapy Sciences, Creative Arts Therapies, SRH University Heidelberg, Heidelberg, Germany
| | - Judit Elias-Masiques
- BCU Health Board (NHS), Bangor, United Kingdom
- School of Human and Behavioural Sciences, Bangor University, Bangor, United Kingdom
| | | | | | - Karrie Swan
- Department of Counseling, Leadership, and Special Education, Missouri State University, Springfield, MO, United States
| | - Magali J. Rochat
- Functional and Molecular Neuroimaging Unit, IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
| | | | - Katharine Forster
- BCU Health Board (NHS), Bangor, United Kingdom
- School of Human and Behavioural Sciences, Bangor University, Bangor, United Kingdom
| | - Pat Amos
- Independent Researcher, Ardmore, PA, United States
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