Three sensory-cognitive processing factors underlie language and literacy skills. Concept Imagery-the ability to image gestalts-is critical to cognition. Phonemic Awareness-the ability to perceive the number, order and identity of sounds within words-is critical for reading and spelling. Symbol Imagery-the ability to visualise letters within sight words-is critical for phonemic awareness, spelling and contextual reading fluency. Comprehension and critical thinking require ability to "dual code" information-in mental images and language. Some individuals have weakness in concept imagery and do not image "gestalts" for language.

They retain only details or parts of information and struggle with higher order thinking skills. These individuals are often diagnosed as Hyperlexic, mildly Autistic or with Asperger's Syndrome. In addition, inaccurate reading prevents or disrupts imagery.

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