One bird with two stones: Abnormal word length effects in pure alexia and semantic dementia.
Toby B Cumming, Karalyn Patterson, Mieke Verfaellie, Kim S Graham
Cogn Neuropsychol | Published : 2006
In pure alexia (PA)-an acquired reading disorder consequent on posterior left-hemisphere stroke-the hallmark is a pronounced and abnormal impact of word length on reading speed. Some patients with semantic dementia (SD)-a neurodegenerative condition affecting semantic memory-have also been reported to show an abnormal word length effect (AWLE) in reading, even though they are not thought to have the basic visual-processing deficits hypothesized to underlie this phenomenon in PA. In the current study, an AWLE in reading was consistently observed in both PA and SD patients, but further manipulations demonstrated marked differences between the groups in the conditions that produce the length ef..View full abstract