Communication is fundamental to the human condition but is impaired in life-altering ways for more than 2.4 million individuals with aphasia in the United States. Individuals with aphasia identify discourse-level communication (i.e. language in use) as a high priority for treatment. The central premise of most aphasia treatments is that restoring…

We examined the basis of feeling-of-knowing judgments (FOK) in patients with schizophrenia. Such patients typically have impaired memory and awareness, but not metamemory-accuracy deficits. The magnitude of FOKs are lower for patients with schizophrenia than for healthy participants, but judgments equally predict memory performance. In healthy…

The current research investigates interactions between lexical and structural processing in the construction and interpretation of transitive and dative sentence structures, and relates speakers' choice of structure in sentence production to STM processes and recent/long-term language experience conditioned on lexical information. Study 1…

Purpose: Speech perception in noise becomes difficult with age but can be facilitated by audiovisual (AV) speech cues and sentence context in healthy older adults. However, individuals with Alzheimer's disease (AD) may present with deficits in AV integration, potentially limiting the extent to which they can benefit from AV cues. This study…

Purpose: The purpose of this study was to develop and pilot a novel treatment framework called "BEARS" (Balancing Effort, Accuracy, and Response Speed). People with aphasia (PWA) have been shown to maladaptively balance speed and accuracy during language tasks. BEARS is designed to train PWA to balance speed-accuracy trade-offs and…

Purpose: This study was intended to adapt into Spanish and validate the short form of the Marwit-Meuser Caregiver Grief Inventory (MMCGI), an instrument for the assessment of levels of grief in caregivers of patients with dementia. Method: The adaptation was based on the cross-cultural equivalence model that included forward and backward…

Background: The typicality effect is present in neurologically intact populations for natural, ad-hoc, and well-defined categories. Although sparse, there is evidence of typicality effects in persons with chronic stroke aphasia for natural and ad-hoc categories. However, it is unknown exactly what influences the typicality effect in this…

For decades, category-specific semantic impairment--i.e., better comprehension of items from one semantic category than another--has been the driving force behind many claims about the organisation of conceptual knowledge in the brain. Double dissociations between patients with category-specific disorders are widely interpreted as showing that…

Category-specific deficits have rarely been reported in semantic dementia (SD). To our knowledge, only four previous studies have documented category-specific deficits, and these have focused on the living versus non-living things contrast rather than on more fine-grained semantic categories. This study aimed to determine whether a…

This study examined the time course of object naming in 21 individuals with primary progressive aphasia (PPA) (8 agrammatic (PPA-G); 13 logopenic (PPA-L)) and healthy age-matched speakers (n=17) using a semantic interference paradigm with related and unrelated interfering stimuli presented at stimulus onset asynchronies (SOAs) of -1000, -500, -100…

The purpose of this lexicological study is to present a typology of patients' euphemizing lay denominations of medical terms illustrated by examples in English and French. Various textbooks and lexicons dealing with English and French for medical purposes served as corpora. The euphemisms were classified according to the three semantic processes…

Dual-process models suggest that recognition memory is independently supported by recollection and familiarity. Current theories attribute recollection solely to hippocampally mediated episodic memory (EM), and familiarity to both episodic and semantic memory (SM) supported by medial temporal lobe cortex (MTLC) and prefrontal cortex. We tested…

Retrieval of proper names is a cause of concern and complaint among elderly adults and it is an early symptom of patients suffering from neurodegenerative diseases such as Alzheimer's disease (AD). While it is well established that AD patients have deficits of proper name retrieval, the nature of such impairment is not yet fully understood.…

Many patients with primary progressive aphasia (PPA) are impaired in syntactic production. Because most previous studies of expressive syntax in PPA have relied on quantitative analysis of connected speech samples, which is a relatively unconstrained task, it is not well understood which specific syntactic structures are most challenging for these…

Several neuropsychological studies have reported that patients with memory deficits exhibit a dissociation of effects attributed to semantic and lexical-phonological information in verbal working memory (e.g., Reilly, Martin, & Grossman, 2005; Romani & Martin, 1999). The present study reports on 3 experiments conducted with individuals without…