Niels Peter K. Nielsen

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Performances on Alzheimer's Quick Test color-form naming and Mini-Mental State Examination were compared for 38 adults with Alzheimer's disease and 38 age- and sex-matched normal controls. Group means differed significantly and indicated longer naming times by adults with Alzheimer's disease. The specificity for AQT color-form naming was 97% and sensitivity(More)
Three automatic naming tasks (Wiig & Nielsen, 1999) were administered to 60 normally functioning adults. The mean time required for naming 40 single-dimension (colors, forms, numbers, and letters) and 40 dual-dimension stimuli (color-form, color-number, and color-letter combinations) were compared in young (17-38 yr.) and older (40-68 yr.) men and women.(More)
Suicidality is a life-threatening symptom in patients with bipolar disorder (BD). Impulsivity and mood instability are associated with suicidality in mood disorders. Evidence suggests that gray and white matter abnormalities are linked with impulsivity in mood disorders, but little is known about the association between corpus callosum (CC) and impulsivity(More)
OBJECTIVE This retrospective study used A Quick Test of Cognitive Speed (AQT) to compare processing speed and efficiency measures by adults with attention-deficit/hyperactivity disorder (ADHD) or non-ADHD psychiatric disorders and healthy controls. METHOD Color, form, and color-form combination naming tests were administered to 104 adults, ages 17-55(More)
OBJECTIVE We evaluated the hypotheses that A Quick Test of Cognitive Speed (AQT) single- and dual-dimension naming speed measures would differentiate normal adults and adults with ADHD before medication and that there would be no differences between groups after stabilization with medication. METHODS Thirty adults with ADHD, aged 18-43, were evaluated(More)
Rapid automatic naming tasks are clinical tools for probing brain functions that underlie normal cognition. To compare performance for various stimuli in normal subjects and assess the effect of aging, we administered six single-dimension stimuli (color, form, number, letter, animal, and object) and five dual-dimension stimuli (color-form, color-number,(More)
A Quick Test of Cognitive Speed color, form, and color-form naming were administered to 300 normal participants (ages 15-95 years) to explore the effects of age on perceptual (single-dimension naming) and cognitive speed (dual-dimension naming). Naming time means (sec.) were consistent with previous findings. Correlations between age and naming time were(More)
Associations between A Quick Test of Cognitive Speed (AQT) perceptual and cognitive speed and neuropsychological tests, including the Wechsler Adult Intelligence Scale-Third Edition (WAIS-III), Mini Mental State Examination (MMSE), and the Trail Making Test (TMT), were evaluated in 41 neuropsychiatric patients. Neuropsychological and neurological tests,(More)
OBJECTIVES To obtain normative data for Alzheimer's Quick Test (AQT) measures of perceptual and cognitive speed from West African speakers of Krio. SUBJECTS Normal adults, who were functionally independent, from Sierra Leone (n = 164) aged 25-79 years. METHODS Perceptual and cognitive speed were measured with AQT single- and dual-dimension colour-number(More)
Color-form naming in A Quick Test of Cognitive Speed (AQT) is used to assess processing speed on three rapid automatic naming tasks, two of which measure single-dimension and the third of which measures dual-dimension naming speed. These tests have been used to identify changes in processing speed associated with normal aging. The present study evaluated(More)