Neglect dyslexia as a word-centred impairment: A single case study

Area of Science:

• Neuropsychology
• Cognitive Neuroscience
• Reading Research

Background:

• Neglect dyslexia involves lateralised errors in word reading.
• It often co-occurs with visuospatial neglect.
• However, some cases suggest a distinct word-centered deficit.

Observation:

• A single case study (AB) of word-centered neglect dyslexia was investigated.
• AB exhibited right-lateralised reading errors (e.g., omitting word endings).
• No object-centered or viewer-centered neglect was observed.

Findings:

• AB's reading errors persisted even when spatial bias was manipulated (vertical/mirror-reflected words).
• Errors specifically affected word processing, not numbers or pseudo-words.
• This indicates a content-specific deficit within a word-centered reference frame.

Implications:

• Neglect dyslexia can be dissociated from visuospatial neglect.
• This supports the existence of distinct cognitive mechanisms for reading and spatial attention.
• Findings advance understanding of reading disorders and brain function.