... to profound hearing impaired children between the ages of 5 and 12 who were placed into one of four groups, depending on grade placement. Subjects each received a red and a blue crayon along with a response booklet that contained 40 sheets of paper. ... The influence of varying modes of presentation and position of sounds in words on speech sound discrimination by Afrikaans speaking children of different age groups. ... Children of five, seven and nine years old were tested.