Japanese children learn to write through rhythm

June 30, 2017, Kobe University
A pen-tip movement for the character "ri" written by one child during the 4th week of hiragana class. Credit: Kobe University

How do we learn to write? Associate Professor NONAKA Tetsushi (Kobe University Graduate School of Human Development and Environment) looked at the development of writing skills in Japanese first-grade students learning the hiragana script. By quantifying their pen movements, he revealed the process of learning distinct temporal patterns of movement in such a way to differentiate a set of subtle features of each symbol. These aspects of handwriting development have been largely neglected in research carried out in Latin alphabet communities. The findings were published on June 13 in Developmental Psychobiology.

Previous research based on the Latin alphabet explains the acquisition of writing skills during childhood as a combination of two processes: the acquisition of visual representations and the of fine motor skills to produce the desired trajectory of the pen. This study looked at the development of movement dynamics of handwriting in 1st graders at the Kobe University Elementary School who learned to write hiragana, a phonetic script used for Japanese. He examined how their movements were influenced by the social norms of the classroom environment in which those 1st graders participated over the first three months of the primary school.

During the study, the children were repeatedly encouraged to pay attention to the specific requirements for writing each character, including stroke endings, stroke order and rhythm of movement. While he observed individual variation in handwriting development among six students studying in the same classroom, two common trends were quantitatively demonstrated. Firstly, the pen movements became clearly differentiated for each type of stroke ending (stop, sweep or jump). Secondly, a consistent temporal structure of movement gradually emerged for each stroke.

The same child's pen-tip movement in the 12th week. Credit: Kobe University

This demonstrates that the process of handwriting development as explained by Latin alphabet-based research - acquiring in hands, plus storing the shapes in the head - cannot fully explain the skill development process for hiragana script. At least in this particular language community, learning the temporal pattern of movement corresponding to a letter seems highly important, based on which the invariant features of a letter—the traces of the specific temporal pattern of —can be discriminated as such. The study also suggests that the process of learning to write by differentiating physical movements may be linked to a phenomenon specific to Chinese character-based cultures known as "air writing", when people unconsciously move their fingers while trying to recall a certain character.

Black, dark-gray, and light-gray arrows on the right correspond to the ending velocities of pen-tip writing the elements with "hooked," "stop," and "sweep" endings of hiragana letter shown in black, dark-gray, and light-gray on the left, respectively. The size and direction of arrows show the magnitude and direction of average velocity within a 50ms-window prior to lifting the pen. Overlaid arrows with the same color correspond to the multiple trials recorded at each week. Credit: Kobe University

Time-normalized resultant speed profiles of pen-tip when one participant wrote the stroke with (a) “hooked” ending, (b) “stop” ending, and (c) “sweep” ending, at 4, 8, and 12 weeks after the beginning of hiragana class. The black element of a hiragana letter on the left correspond to the movement profiles shown on the right. Overlaid lines show multiple trials recorded at each week. Credit: Kobe University

Explore further: Older adults can improve movement by using same motor strategy as babies

More information: Tetsushi Nonaka, Cultural entrainment of motor skill development: Learning to write hiragana in Japanese primary school, Developmental Psychobiology (2017). DOI: 10.1002/dev.21536

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