Development, validity and reliability of the systematic screening for handwriting difficulties tool  [version 1; peer review: awaiting peer review]

Background The purpose of this study was to develop an Arabic handwriting screening test and establish its psychometric properties. Methods Handwriting quality was evaluated using seven criteria from the Systematic Screening for Handwriting Difficulties Arabic (SOS-ARB) and writing speed were measured by counting the number of letters produced in 5 minutes. Construct validity was evaluated using hypothesis testing (learning disabilities, sex and age differences). Convergent validity was examined using data from 106 children with dysgraphia who were also administered the French version of the "Concise Assessment Methods of Children's Handwriting" (BHK). Intrarater, interrater, and test-retest reliability were established for total and item scores. Results Handwriting test data were collected from 1274 children (6-10 years) in regular education, of whom 194 were diagnosed with Learning Disabilities (LD). The SOS-ARB scores differed between children with and without LD (F (1, 1273) = 330.90, p