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Fyndanis, Valantis; Arcara, Giorgio; Christidou, Paraskevi; Caplan, David – Journal of Speech, Language, and Hearing Research, 2018
Purpose: The present work investigated whether verbal working memory (WM) affects morphosyntactic production in configurations that do not involve or favor similarity-based interference and whether WM interacts with verb-related morphosyntactic categories and/or cue-target distance (locality). It also explored whether the findings related to the…
Descriptors: Morphology (Languages), Syntax, Verbal Ability, Short Term Memory
Levy, Joshua; Hoover, Elizabeth; Waters, Gloria; Kiran, Swathi; Caplan, David; Berardino, Alex; Sandberg, Chaleece – American Journal of Speech-Language Pathology, 2012
Purpose: Prior studies of discourse comprehension have concluded that the deficits of persons with aphasia (PWA) in syntactically based comprehension of sentences in isolation are not predictive of deficits in comprehension of sentences in discourse (Brookshire & Nicholas, 1984; Caplan & Evans, 1990). However, these studies used semantically…
Descriptors: Aphasia, Sentences, Semantics, Syntax
Caplan, David; Waters, Gloria; Kennedy, David; Alpert, Nathanial; Makris, Nikos; DeDe, Gayle; Michaud, Jennifer; Reddy, Amanda – Brain and Language, 2007
This paper presents the results of a study of the effects of left hemisphere strokes on syntactically-based comprehension in aphasic patients. We studied 42 patients with aphasia secondary to left hemisphere strokes and 25 control subjects for the ability to assign and interpret three syntactic structures (passives, object extracted relative…
Descriptors: Aphasia, Syntax, Comprehension, Language Processing
Caplan, David; Waters, Gloria; DeDe, Gayle; Michaud, Jennifer; Reddy, Amanda – Brain and Language, 2007
This paper presents the results of a study of syntactically based comprehension in aphasic patients. We studied 42 patients with aphasia secondary to left hemisphere strokes and 25 control participants. We measured off-line, end-of-sentence, performance (accuracy and reaction time) in two tasks that require comprehension--enactment and…
Descriptors: Aphasia, Syntax, Language Processing, Comprehension
Caplan, David; DeDe, Gayle; Brownell, Hiram – Brain and Language, 2006
We reanalyzed the data in Drai and Grodzinksy (2005), considering individual patients' responses to different sentence types to be non-independent events. The analyses revealed effects of two of the three factors identified by Drai and Grodzinsky-constituent movement and passive mood. The result is inconsistent with the trace deletion hypothesis;…
Descriptors: Sentence Structure, Syntax, Comprehension, Aphasia

Caplan, David; Walters, Gloria S. – Language and Cognitive Processes, 1996
The functional architecture of the verbal processing resource system was studied by testing aphasic patients in Canada and Boston for their abilities to use syntactic structure in sentence comprehension in isolation and under dual-task conditions. Results indicate that the processing resource system underlying syntactic processing is separate from…
Descriptors: Analysis of Variance, Aphasia, Auditory Stimuli, Cognitive Processes