L.I.P.S. – Laboratory for Impaired Production of Speech


Research in the Laboratory for Impaired Production of Speech (L.I.P.S.) explores acquired motor speech disorders that result from neurological damage, with a particular focus on neurodegenerative disorders and intra-speaker variability. Our objectives include:

  • The study of the deficits underlying the impairment of the various speech subsystems, as well as the interactions between these subsystems and with other cognitive processes, to improve diagnosis and management;
  • The development of assessment tools with robust psychometric properties for the detection and monitoring of speech disorders, particularly in French-speaking individuals and for the identification of acoustic biomarkers;
  • The study of intra-individual variation in healthy and pathological speech to strengthen the validity of clinical assessments.

The main methods used in the lab include acoustic and perceptual analyses, along with complementary instrumental and clinical measurements. Ongoing projects focus on the study of speech in diverse clinical populations, such as amyotrophic lateral sclerosis (ALS), primary progressive aphasia (PPA) and primary progressive apraxia of speech (PPAS), and of inter- and intra-individual variability in speakers with and without neurological disorders.



Apraxia of speech, dysarthria, motor speech disorders, acoustic analyses, speech-language pathology, assessment, differential diagnosis, intra-speaker variability, neurodegenerative diseases, primary progressive apraxia, primary progressive aphasia, amyotrophic lateral sclerosis.





L.I.P.S. – Laboratory for Impaired Production of Speech


Axis and research theme

  • AXIS 1 – Sensory, motor and cognitive functions and activities
  • THEME 1 – Functional mechanisms


Research team


Liziane Bouvier, Ph.D., S-LP
Assistant Professor, School of Human Communication Sciences; McGill University
Reasearcher at CRIR-IURDPM





Contact information

CRIR-Institut universitaire sur la réadaptation en déficience physique de Montréal (IURDPM),  Lindsay Pavillon
CIUSSS du Centre-Sud-de-l’Île-de-Montréal
2275 Laurier Avenue East
Montreal QC H2H 2N8
Telephone: (514) 340-2085
E-mail: liziane.bouvier@mcgill.ca

L.I.P.S. – Laboratory for Impaired Production of Speech
School of Communication Sciences and Disorders
2001 McGill College 8th floor
Montreal QC H3A 1G1