Propositional Density in Spoken and Written Language of Czech-Speaking Patients With Mild Cognitive Impairment Purpose Propositional density (PD) is a measure of content richness in language production that declines in normal aging and more profoundly in dementia. The present study aimed to develop a PD scoring system for Czech and use it to compare PD in language productions of older people with amnestic mild ... Research Article
Research Article  |   December 01, 2016
Propositional Density in Spoken and Written Language of Czech-Speaking Patients With Mild Cognitive Impairment
 
Author Affiliations & Notes
  • Filip Smolík
    Institute of Psychology of the Academy of Science of the Czech Republic, Prague
  • Hana Stepankova
    National Institute of Mental Health, Klecany, Czech Republic
    Faculty of Arts, Charles University, Prague, Czech Republic
  • Martin Vyhnálek
    Memory Clinic, Department of Neurology, Charles University, Prague, Czech Republic
    International Clinical Research Center, St. Anne's University Hospital Brno, Czech Republic
  • Tomáš Nikolai
    Memory Clinic, Department of Neurology, Charles University, Prague, Czech Republic
  • Karolína Horáková
    National Institute of Mental Health, Klecany, Czech Republic
    Faculty of Arts, Charles University, Prague, Czech Republic
  • Štěpán Matějka
    Faculty of Arts, Charles University, Prague, Czech Republic
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: The authors have declared that no competing interests existed at the time of publication. ×
  • Correspondence to Filip Smolík: smolik@praha.psu.cas.cz
  • Editor: Rhea Paul
    Editor: Rhea Paul×
  • Associate Editor: Jessica Richardson
    Associate Editor: Jessica Richardson×
Article Information
Special Populations / Cultural & Linguistic Diversity / Older Adults & Aging / Language Disorders / Attention, Memory & Executive Functions / Language / Research Articles
Research Article   |   December 01, 2016
Propositional Density in Spoken and Written Language of Czech-Speaking Patients With Mild Cognitive Impairment
Journal of Speech, Language, and Hearing Research, December 2016, Vol. 59, 1461-1470. doi:10.1044/2016_JSLHR-L-15-0301
History: Received August 26, 2015 , Revised February 24, 2016 , Accepted May 19, 2016
 
Journal of Speech, Language, and Hearing Research, December 2016, Vol. 59, 1461-1470. doi:10.1044/2016_JSLHR-L-15-0301
History: Received August 26, 2015; Revised February 24, 2016; Accepted May 19, 2016

Purpose Propositional density (PD) is a measure of content richness in language production that declines in normal aging and more profoundly in dementia. The present study aimed to develop a PD scoring system for Czech and use it to compare PD in language productions of older people with amnestic mild cognitive impairment (aMCI) and control participants matched on age, gender, and education.

Method Groups of patients with aMCI and cognitively healthy control participants (N = 20 each) provided short spoken and written language samples. Two samples were elicited for each modality, 1 describing recent events and 1 describing childhood memories. Series of neuropsychological tests were administered. The groups were compared using t-tests and the relations between measures using correlation coefficients.

Results PD was lower in spoken productions of patients with aMCI, compared with control participants, but only in language samples using remote memories. PD in these samples was related to verbal fluency and education but not to working memory. PD in written samples did not differ between participants with aMCI and control participants.

Conclusions PD in spoken language reflects the cognitive decline in people with aMCI, but the effect is relatively mild. The results support the existing findings that PD is related to verbal fluency.

Acknowledgments
This work was primarily supported by the Grant Agency of the Charles University in Prague under Grants GAUK 1332214 and 562412 to Hana Stepankova; by the Ministry of Health, Czech Republic, under the Conceptual Development of Research Organization (RVO 00023752) and by the project “National Institute of Mental Health (NUDZ),” Grant ED2.1.00/03.0078 from the European Regional Development Fund to the National Institute of Mental Health, Klecany, Czech Republic. Funding was also provided by the Ministry of Health, Czech Republic, under the Conceptual Development of Research Organization (RVO 00064203) to the University Hospital Motol, Prague, Czech Republic; and by the project FNUSA-ICRC, Grant CZ.1.05/1.1.00/02.0123 from the European Regional Development Fund to the International Clinical Research Center, St. Anne's University Hospital Brno, Czech Republic. The first author was supported by the Czech Academy of Sciences under the Conceptual Development of Research Organization scheme (RVO 68081740) and Czech Science Foundation Grant GAGA13-26779S to the Institute of Psychology of the Czech Academy of Sciences.
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