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Abstract

Dyslexia is a heritable, neurobiological learning disorder that persistently interferes with reading, spelling, and writing and is distinct from intellectual, visual, or hearing impairments. Although an estimated 15% to 20% of the general population may show symptoms of dyslexia, studies report that 41% to 62% of incarcerated individuals display dyslexia-related characteristics. This beginner’s guide introduces dyslexia for criminal justice, forensic mental health, and legal professionals. It reviews diagnostic considerations, including the distinction between dyslexia and low literacy, the varied cognitive profiles of dyslexia, and the influence of co-occurring conditions such as attention-deficit/hyperactivity disorder. The article frames the link between dyslexia and justice-system involvement as probabilistic and indirect, outlining educational, socioeconomic, and co-occurring-condition pathways alongside protective factors. It then examines how dyslexia-related barriers can affect police contact, rights warnings and interrogations, attorney–client communication, competency, plea decisions and sentencing, custody, community supervision, and reentry. It also summarizes disability access obligations under Title II of the Americans with Disabilities Act and the dyslexia provisions of the First Step Act of 2018. Practical recommendations include plain-language communication, adequate processing time, oral presentation of essential information, and comprehension checks that go beyond yes-or-no questions. The article concludes that dyslexia does not cause criminal behavior, that screening must be linked to qualified assessment and intervention, and that future research should prioritize standardized definitions, longitudinal designs, and evaluations of accommodations and literacy interventions.

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