Abstract

Educationally-oriented measures of handwriting fluency – tasks such as written alphabet recall and sentence copying – conflate graphomotor skill and various higher-level abilities. Direct measurement of pen control when forming letters requires analysis of pen-tip velocity associated with the production of sub-letter features that, in a skilled handwriter, are typically produced in a single, smooth movement. We provide a segmentation and coding scheme that identifies these features in manuscript letters and gives criteria for whether or not a feature is accurately formed. We demonstrate that, in skilled handwriters, these features are the product of smooth movements: The velocity profiles of adult writers (N = 27 performing a letter-copying task) producing straight-line features and curved features gave modal velocity-peak counts of 1 and 2 respectively. We then illustrate the utility of our segmentation and coding scheme by describing the velocity profiles of beginning writers (176 first grade students with minimal handwriting training). This sample produced the same features with less accuracy and with a substantially greater number of velocity peaks. Inaccurate features tended to be produced more slowly and less fluently.

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