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Am J Alzheimers Dis Other Demen. 2017 Nov;32(7):382-392. doi: 10.1177/1533317517715905. Epub 2017 Jun 22.

Detection Test for Language Impairments in Adults and the Aged-A New Screening Test for Language Impairment Associated With Neurodegenerative Diseases: Validation and Normative Data.

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1 Département de réadaptation, Faculté de médecine, Université Laval, Québec, Canada.
2 Centre de recherche, Institut universitaire en santé mentale de Québec, Québec, Canada.
3 Institut des sciences du langage et de la communication, Université de Neuchâtel, Neuchâtel, Switzerland.
4 Service de Psychologie cognitive et Neuropsychologie, Université de Mons, Mons, Belgium.
5 Centre Leennaards de la Mémoire, Université de Lausanne, CHUv Lausanne, Switzerland.
6 Département d'orthophonie, Faculté de Médecine, Université de Lille, France.


To date, there is no quick screening test that could be used during routine office visits to accurately assess language disorders in neurodegenerative diseases. To fill this important gap, we developed the Detection Test for Language impairments in Adults and the Aged (DTLA), a quick, sensitive, standardized screening test designed to assess language disorders in adults and the elderly individuals. In Study 1, we describe the development of the DTLA. In Study 2, we report data on the DTLA's validity and reliability. Finally, in Study 3, we establish normative data for the test. The DTLA has good convergent and discriminant validity as well as good internal consistency and test-retest reliability. Norms for the DTLA obtained from a sample of 545 healthy, community-dwelling, French-speaking adults from 4 French-speaking countries (Belgium, Canada (Quebec), France, and Switzerland) are provided. The development, validation, and standardization of the DTLA constitute a significant effort to meet the need for a language screening test adapted to neurodegenerative diseases.


dementia; language abilities screening instrument; normative data; primary progressive aphasia; validity

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