Alternative strategies of orthographic processing: the case of skilled deaf readers
The cognitive factors that enable us to be proficient readers can greatly vary across individuals. The case of skilled deaf readers is emblematic as it shows that high reading performances can be achieved even when lifelong acoustic experience is absent or minimal. Here we present a set of experiments investigating how alternative strategies of orthographic processing can lead to high levels of reading proficiency. Four EEG studies compared behavioral and brain correlates of orthographic processing in skilled deaf readers and matched hearing controls. Using single word recognition and priming paradigms, we investigated two pillars of orthographic processing: letter identity and letter position. Our findings show that, although both groups had similarly accurate reading performance, skilled deaf readers were faster, and they consistently differ from hearing controls in the way they process letter identity. This group difference was observed in both lexical and sublexical tasks and was specifically related to the identity of orthographic representations, regardless of the visual form of the written stimuli (such as character visual similarity and letter case). These findings uncover alternative strategies that make possible high reading performance, even in the absence of acoustic experience. Public Significance StatementThis research identifies alternative orthographic strategies that improve single-word reading efficiency and can potentially serve as effective compensatory tools when phonological processing is impaired.