Disentangling phonology from phonological short‐term memory in the logopenic variant of primary progressive aphasia and typical, amnestic Alzheimer's disease

We have shown that deficits in "pure" phonological tasks, namely single word and non-word repetition, are (i) not dependent on working memory and (ii) greater in patients with a self-reported hearing loss across all groups with lvPPA or tAD. Our results suggest that instead of having a core phonological impairment, lvPPA patients have a working memory/buffering impairment that adversely affects their performance on length-dependent working memory tasks.