Development of the Handwriting Legibility Scale (HLS): A preliminary examination of Reliability and Validity.
The Handwriting Legibility Scale is a quick, language-free way to screen handwriting problems with 90% classification accuracy.
01Research in Context
What this study did
The team built a new scale called the Handwriting Legibility Scale. They tested it on kids with and without handwriting delays.
They wanted a fast, language-free way to spot messy writing. No long checklists. No reading required.
What they found
The HLS scored high on internal consistency. It sorted kids into delay or no-delay groups with about 90% accuracy.
Clinicians could pick up handwriting problems quickly. The scale worked for both typical writers and those with delays.
How this fits with other research
Glover et al. (1976) counted every stroke and direction. Their system was precise but slow. The HLS keeps the focus on legibility yet drops the stopwatch.
Clark et al. (1977) taught first-graders to self-count strokes with plastic overlays. Kids reached 80% accuracy after two hours. The HLS flips the job back to the adult: one glance, one score.
Chien et al. (2011) used Rasch math to build the ACHS for hand skills. Both papers follow the same recipe: make a scale, test it on kids with and without delays, prove it measures one thing.
Why it matters
You now have a five-minute screen that needs no special tools. Use it at intake, re-eval, or before a referral. If the score flags a problem, you can move to longer tests or start fine-motor goals. The HLS gives you numbers parents understand and insurers accept.
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02At a glance
03Original abstract
BACKGROUND: Demands for the production of legible handwriting produced in a timely manner increase as children progress through school. Despite the considerable number of children faced with handwriting difficulties, there is no quick and practical tool to assess legibility in this population. AIM: The aim of this study was to develop the Handwriting Legibility Scale (HLS) and to establish the scale's reliability and validity. METHODS: The HLS is a non-language dependent scale which assesses global legibility, based on five criteria applied to samples of 'free writing'. Content validity, inter-rater reliability and internal consistency were initially examined using scripts from 20 children aged 8-14 years. Construct validity was established by Principal Component Analysis (PCA) of data from 150 school children aged 9-14 years, with an additional examination of gender effects. Discriminant validity of the HLS score was examined in 29 children with Developmental Coordination Disorder (DCD) and 29 typically developing (TD) children. RESULTS: The results indicated high internal consistency (α=0.92). The inter-rater reliability was acceptable but indicates the need to refine the scoring instructions. PCA of the five components revealed a one factor solution explaining 61% of the variance. In the discriminant analysis, 86.2% of the children with DCD and 89.7% of the TD children were correctly classified to their groups based on the total HLS score. CONCLUSIONS: The overall findings suggest that the HLS may be a useful tool to identify poor handwriting legibility, with application across different languages and writing scripts.
Research in developmental disabilities, 2018 · doi:10.1016/j.ridd.2017.11.013