Browsing Bergen Open Research Archive by Author "Hellton, Kristoffer Herland"

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The Truth behind the Zeros: A New Approach to Principal Component Analysis of the Neuropsychiatric Inventory

Hellton, Kristoffer Herland; Cummings, Jeffrey; Vik-Mo, Audun Osland; Nordrehaug, Jan Erik; Aarsland, Dag; Selbæk, Geir; Melvær, Giil Lasse (Journal article; Peer reviewed, 2021)

Psychiatric syndromes in dementia are often derived from the Neuropsychiatric Inventory (NPI) using principal component analysis (PCA). The validity of this statistical approach can be questioned, since the excessive ...