character, difficulty, individuals, disability, intelligence, problem, words, writing, pronouncing, understanding, ability, involuntary, attention, deficit, hyperactive, ADHD, language, numbers, developmental, genetic, environment, develop, trauma, brain, injury, stroke, dementia, process, test, diagnose, memory, vision, skills, treatment, degree, common, speech, behavior, behaviour, assessment, symptoms, signs, strategies, children, identify, syllables, sound, awareness, slowly, impairment