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Handwriting Analysis Indicates Spontaneous Dyskinesias in Neuroleptic Naïve Adolescents at High Risk for Psychosis

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Effects of biscriptuality on graphomotor coordination dynamics.

Gaëlle Alhaddad¹, Jérémy Danna¹, Celeste Younes-Harb²

¹LNC, CNRS, Aix-Marseille Universite.

Journal of Experimental Psychology. Human Perception and Performance

|December 1, 2022

Summary

Biscriptuality, the ability to write in two scripts, enhances graphomotor coordination. Biscriptual individuals showed better tracing frequency than monoscriptuals, suggesting an advantage for writing expertise.

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Area of Science:

Cognitive Neuroscience
Human Motor Control
Psycholinguistics

Background:

Biscriptuality involves proficiency in two distinct writing systems.
Understanding its impact on fine motor skills is crucial for cognitive research.
Graphomotor coordination is essential for tasks like handwriting and drawing.

Purpose of the Study:

To investigate the effects of biscriptuality on graphomotor coordination dynamics.
To compare the performance of biscriptual individuals with monoscriptual individuals.
To explore the influence of writing direction and expertise on motor performance.

Main Methods:

Participants included 34 French monoscriptuals and 34 French-Arabic biscriptuals (all right-handed).
Participants traced loops in various writing directions and rotation directions.
Tracing frequency and movement dynamics were analyzed.

Main Results:

Biscriptuals demonstrated a general advantage in tracing frequency compared to monoscriptuals.
Both groups exhibited a preference for the left-to-right writing direction.
Writing direction and biscriptual expertise significantly impacted graphomotor performance.

Conclusions:

Biscriptuality may confer an advantage in graphomotor coordination.
Expertise in multiple writing systems can enhance fine motor skills.
Further research is needed to explore the neural underpinnings of these findings.