Elisabeth H. Wiig, Ph.D. is Professor Emerita, Boston University and President of Knowledge Research Institute, an independent research and consulting firm. She is a Fellow of the American Speech-Language-Hearing Association (ASHA), the recipient of the ASHA Foundation 2001 Frank R. Kleffner Career Award and the 2005 Honors of the Association. She is author/co-author of several language tests (e.g., CELF-4, CELF-4 Spanish, CELF-Preschool-2), has published over 90 research articles in professional journals, and contributed to texts on language disorders and psycho-educational assessment. She engages in neuropsychological research of screening for cognitive impairments associated with dementia and other neurogenic and psychiatric disorders and is senior author of AQT. Her current research of language disorders and learning disabilities in children and adults focuses on verbal executive functions and implications of deficits for language, communication, literacy, academic achievement and socialization. . For further information, please see Dr. Wiig's curriculum vitae (.pdf file).

Niels Peter Nielsen, M.D., is a Danish psychiatrist with specialization in geronto-psychiatry, certified in Denmark and Sweden. He served as chief of psychiatry at the Helsingborg Psychiatric Hospital in Sweden and practiced at the District Psychiatric Center-Vesterbro and Hvidovre Hospital in Copenhagen. Dr. Nielsen is involved in rapid automatic naming and neuroimaging (rCBF) research of patients with Alzheimer’s and other dementias. He is co-author of the Alzheimer Quick Test: Assessment of Parietal Function (Wiig, Nielsen, Minthon, & Warkentin, 2002. San Antonio, TX: PsychCorp). His current interests include, among others, research of the prevalence of early-onset Alzheimer’s in adult referrals and in patients with late onset depression of unspecified origin.
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