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Language is a window into the brain.
The goal of the CASPR project is to find ways to
diagnose, assess, and investigate mental illness
and other brain impairments
through computer analysis of speech.
CASPR's initial work was funded by GlaxoSmithKline Plc.
Use the following links to learn more about it.
Software downloads
NLPUtils (Boisclair tokenizer and morphological analyzer)
Verstaile tokenizer and morphological analyzer for English, in C#.
Programs and documentation (updated 2008 March 21)
Project web site
NEW
MATTR (Moving-Average Type-Token Ratio) version 2.0 for Windows
(functionally like 1.0, slightly faster)
Documentation (PDF, Research Report 2007-03, unchanged since MATTR 1.0)
Executable and source code for Windows 2000/XP/Vista
(believed to be usable under Mac OS X and Linux by same methods as CPIDR; see manual)
MATTR (Moving-Average Type-Token Ratio) version 1.0 for Windows
Documentation (PDF, Research Report 2007-03)
Executable and source code for Windows 2000/XP/Vista
(believed to be usable under Mac OS X and Linux by same methods as CPIDR; see manual)
CPIDR (Computerized Propositional Idea Density Rater) version 3.2 for Windows
Documentation (PDF, Research Report 2007-03)
See also the published paper listed below.
CPIDR 3.2 installation package for Windows 2000/XP/Vista (zipped MSI, including source code and documentation)
Running CPIDR under Mac OS X, UNIX, and Linux (PDF, Research Report 2007-04)
CPIDR 3.2 files for Mac OS X, UNIX, Linux (zipped package of individually accessible files)
Published Papers (most recent first)
NEW Brown, Cati; Snodgrass, Tony; Kemper, Susan J.; Herman, Ruth; and Covington, Michael A. (2008) Automatic measurement of propositional idea density from part-of-speech tagging. Behavior Research Methods 40 (2) 540-545.
Covington, Michael A.; Riedel, Wim J.; Brown, Cati; He, Congzhou; Morris, Eric; Weinstein, Sara; Semple, James; Brown, John (2007) Does ketamine mimic aspects of schizophrenic speech? Journal of Psychopharmacology 21 (3) 338-346.
Covington, Michael A.; He, Congzhou; Brown, Cati; Naci, Lorina; McClain, Jonathan T.; Fjordbak, Bess Sirmon; Semple, James; Brown, John (2005) Schizophrenia and the structure of language: the linguist's view. Schizophrenia Research 77(1):85-98, 2005.
Published Abstracts (most recent first)
He, Congzhou; Weinstein, Sara; and Covington, Michael A. (2007) Using text analysis software in schizophrenia research. Schizophrenia Bulletin 33:522.
Brown, Cati; Covington, Michael A.; Semple, James; and Brown, John (2005) Reduced idea density in speech as an indicator of schizophrenia and ketamine intoxication. Schizophrenia Bulletin 31:187-188.
He, Congzhou; Covington, Michael A.; Semple, James; and Brown, John (2005) Some linguistic signs of ketamine-induced cognitive impairment. Schizophrenia Bulletin 31:511.
Presentations (most recent first)
He, Congzhou; Weinstein, Sara; and Covington, Michael A. Using text analysis software in schizophrenia research, poster presented at International Congress on Schizophrenia Research, Colorado Springs, March 2007.
Brown, Cati; Snodgrass, Tony; Covington, Michael A.; Herman, Ruth; and Kemper, Susan J., Measuring propositional idea density through part-of-speech tagging, poster presented at Linguistic Society of America Annual Meeting, Anaheim, California, January 2007.
Baptista, Marlyse; Fjordbak, Bess; and Covington, Michael A., Linguists meet clinicians: a study of language disorders, poster presented at the University of Georgia Linguistics Conference, Athens, Georgia, September 2006.
He, Congzhou; Weinstein, Sara; and Covington, Michael A., Speech analysis software for psychiatric research: the case of D-Level Rater, poster presented at the First annual Georgia/South Carolina Neuroscience Consortium, Charleston, April 2006.
Brown, Cati; Covington, Michael A.; Semple, James; and Brown, John, Reduced idea density in speech as an indicator of schizophrenia and ketamine intoxication, poster presented at the International Congress on Schizophrenia Research, Savannah, April 2005.
He, Congzhou; Covington, Michael A.; Semple, James; and Brown, John, Some linguistic signs of ketamine-induced cognitive impairment, poster presented at the International Congress on Schizophrenia Research, Savannah, April 2005.
He, Congzhou; Brown, Cati; Covington, Michael A.; and Naci, Lorina, How complex is that sentence? A proposed revision of the Rosenberg and Abbeduto D-Level scale, poster presented at the annual meeting of the Linguistic Society of America, Boston, January 2004.
CASPR Research Reports (most recent first)
Research Report 2007-05
Michael A. Covington
MATTR User Manual
Research Report 2007-04
Cody Boisclair
Running CPIDR under Mac OS X, UNIX, and Linux
Research Report 2007-03
Michael A. Covington
CPIDR 3 User Manual
Research Report 2007-02
Michael A. Covington and Joe D. McFall
Using MontyLingua 2.1 with C# and Microsoft .NET
Research Report 2007-01
Colin Nicholson
Schizophrenia and the Structure of Language: Annotated Bibliography 2004-2006
Research Report 2006-02
Congzhou He
Using Text Analysis Software in Schizophrenia Research
Research Report 2006-01
Michael A. Covington,
Congzhou He, Cati Brown,
Lorina Naci, and John Brown
How Complex is That Sentence? A Proposed Revision of the
Rosenberg and Abbeduto D-Level Scale
Research Report 2005-02
Salena A. Sampson
Computerized Analysis of Salient Items and Discourse Comprehension
in Schizophrenic Picture Descriptions
Research Report 2005-01
Matthew J. Voss
Determining Syntactic Complexity Using Very Shallow Parsing
For research reports of the Institute for Artificial Intelligence (not CASPR), click here.
The former CASPR internal web site is no longer accessible by Web; use VPN or SFTP.
How to make a PDF file of a printed document using Acrobat 8 — read this if you are involved in maintaining the CASPR library.
Obligatory training for new researchers:
New members of the CASPR team must complete an online training course in human subjects research ethics. This does not have to be done all at once; it is divided into 30-minute modules.
To receive the training, go to http://www.ovpr.uga.edu/hso/irb101.html and follow the instructions. Choose either the Social and Behavioral or the Bio-Medical course. When you finish, print out and save a copy of your certificate, and also e-mail the principal investigator.