Cognition and Language Disorders Lab


The objectives of the Cognition and Language Disorders Lab are to investigate the cognitive bases of acquired language disorders in adults and to develop theoretically sound treatments for stroke-induced aphasia or language disorders due to traumatic brain injury. Through this work, we seek to achieve a better understanding of the ways neurologic insults impair language in order to produce better outcomes following language rehabilitation.

Current projects

Lexical patterns following aphasia

We measure reaction times and error rates on visual and auditory naming tasks in participants with aphasia to investigate the influence of word characteristics (age of acquisition, frequency of occurrence, animacy) on lexical processing. By comparing the outcomes obtained from these two approaches, we expect to gain a clearer understanding of the effects of aphasia on the lexical processing system.

If you are interested in participating in this study, please find more information here:

The relationship between language and other cognitive abilities following traumatic brain injury

The goal of this project is to identify and better understand the language problems of individuals who have experienced a traumatic brain injury.  We analyze discourse samples using online (pause patterns) and offline (mazes, errors) measures to investigate sentence planning within- and between-sentences.

Assessment of treatment approaches to acquired language disorders associated with attentional deficits

Treatments that address language disorders by stimulating general attentional abilities result in weak outcomes.  Better outcomes might be observed from treatments that focus specifically on language tasks that compete for attentional resources. This project aims to develop such an approach and to test it compared to current approaches that do not utilize a linguistic framework.

Head of lab

Richard K. Peach, PhD, is a professor in the departments of Communication Disorders and Sciences, Neurological Sciences and Otolaryngology/Head & Neck Surgery.


Richard K. Peach, PhD

Rush University
Armour Academic Center
600 S. Paulina St., Room 1018B
Chicago, Illinois  60612

Phone: (312) 942-3293