Background: Despite its importance, in-depth analysis of connected speech is often neglected in the diagnosis of primary progressive aphasia (PPA) -- especially for the logopenic variant (lvPPA) for which unreliable differential diagnosis has been documented. Only a few studies have been conducted on this topic in lvPPA. Aims: The aim of this…

Speakers use speech and gestures to represent referents in discourse. Depending on referents' information status, in speech speakers will vary richness of expression (e.g., lexical noun phrase [NP]/pronoun), nominal definiteness (indefinite/definite), and grammatical role (subject/object). This study tested whether these three linguistic markers…

While the research on pretask planning has concentrated on its effects on learners' task performance in terms of fluency, accuracy, and complexity, its possible influence on the overall discourse level, such as discourse management and coherence, has been largely ignored. The present study addresses the inadequacy by uncovering the potential…

Short-term memory (STM) for serially presented visual items is disrupted by task-irrelevant, to-beignored speech. Five experiments investigated the extent to which irrelevant speech is processed semantically by contrasting the following two hypotheses: (1) semantic processing of irrelevant speech is limited and does not interfere with serial STM…

Purpose: Of the three currently recognized variants of primary progressive aphasia, behavioral differentiation between the nonfluent/agrammatic (nfvPPA) and logopenic (lvPPA) variants is particularly difficult. The challenge includes uncertainty regarding diagnosis of apraxia of speech, which is subsumed within criteria for variant classification.…