Identifying dyslexia-consistent reading profiles in mild intellectual disability: cluster-derived severity gradients and severity-calibrated classification rules - Takeaways - MDSpire

Identifying dyslexia-consistent reading profiles in mild intellectual disability: cluster-derived severity gradients and severity-calibrated classification rules

  • By

  • Bartosz M. Radtke

  • Paweł Jurek

  • Michał Olech

  • Ariadna Łada-Maśko

  • Urszula Sajewicz-Radtke

  • May 29, 2026

  • 0 min

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  • 1

    The study analyzed diagnostic data from 446 students with mild intellectual disability (MID) to explore dyslexia profiles.

  • 2

    A two-cluster solution revealed a dominant severity gradient in reading and related markers among individuals with MID.

  • 3

    Broad classification criteria identified 88% of the sample, including many higher-performing cases, while extreme-severity anchors reduced prevalence to 37%.

  • 4

    Word-level reading, particularly decoding and fluency, was found to be the most reliable basis for subgroup identification in MID.

  • 5

    Phonological processing and rapid automatized naming (RAN) showed limited additional classification value within the study's rule structure.

Original Source(s)

Identifying dyslexia-consistent reading profiles in mild intellectual disability: cluster-derived severity gradients and severity-calibrated classification rules

  • by Bartosz M. Radtke, Paweł Jurek, Michał Olech, Ariadna Łada-Maśko, Urszula Sajewicz-Radtke

  • May 29, 2026

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