Changes in Kinetics and Kinematics of Handwriting during a Prolonged Writing Task in Children with and without Dysgraphia

Autor/inn/en	Kushki, Azadeh; Schwellnus, Heidi; Ilyas, Faizah; Chau, Tom
Titel	Changes in Kinetics and Kinematics of Handwriting during a Prolonged Writing Task in Children with and without Dysgraphia
Quelle	In: Research in Developmental Disabilities: A Multidisciplinary Journal, 32 (2011) 3, S.1058-1064 (7 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0891-4222
DOI	10.1016/j.ridd.2011.01.026
Schlagwörter	Handwriting; Learning Disabilities; Biomechanics; Grade 4; Kinetics; Writing Assignments; Writing Skills; Elementary School Students; Comparative Analysis; Psychomotor Skills + Suchen Sie Ihr Suchwort? Handschrift; Learning handicap; Lernbehinderung; Biomechanik; School year 04; 4. Schuljahr; Schuljahr 04; Kinetik; Writing skill; Schreibfertigkeit; Psychomotorische Aktivität
Abstract	Handwriting difficulties or dysgraphia have a profound impact on children's psychosocial development, and yet, 10-30% of school-aged children are reported to experience difficulties mastering this skill. Several studies have examined the nature and biomechanical underpinnings of handwriting difficulties in children with and without dysgraphia. While the majority of these studies have considered short handwriting activities involving a sentence or a paragraph, handwriting quality and speed are reported to vary with the length of the writing task. Further, it is suggested that the biomechanics of handwriting also evolve over extended writing periods, and that these changes may be distinct between children with and without dysgraphia. The nature and specificity of these biomechanical alterations remain unknown. To address this knowledge gap, we examined changes in writing speed, grip forces on the pen barrel, and normal forces on the writing surface, over the course of a 10-min writing task, in a large cohort of 4th grade children with and without dysgraphia. Horizontal stroke speed, grip force and normal force increased over time while vertical stroke speed decreased in all children. These biomechanical changes may be attributable to physical and psychological fatigue and the corresponding compensatory processes invoked by the motor system. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10