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Visual Discrimination Of Letters In The Alphabet By Young Children: A Rasch Measurement Analysis, Janet Richmond, Russell Waugh

Janet E Richmond PhD

Data on 30 items for upper case letters and 36 items for lower case letters, where each item was scored in one of two categories (wrong scored zero and correct scored one), were Rasch analysed to create two linear scales . The student sample was N=324 pre-primary and primary students (aged 5 to 9 years) in Perth, Western Australia. Twelve of the initial 30 items of Visual Discrimination of Upper Case Letters were deleted due to item misfit statistics leaving 18 items and five of the original 36 items for Visual Discrimination of Lower Case Letters were deleted leaving 31 …