Principal component analysis was used to identify the number of items and partial least squares methods were used to further assemble compounded measurements into an expressed opinion.
Ályktunarhæfni mælinga sem lýsa þessum sjónarmiðum var metin með höfuðþáttagreiningu (e. Principal Component Analysis) og aðferð hlutdrægra kvaðrata (e. Partial Least Squares).