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Each of the three primary scales is comprised of several item clusters.
We expected that the fit of a multivariable model including the new global scale on any of the criterion standards would be equivalent or superior to the fit of models that include the three primary scales.
The factor scoring coefficients used to derive the scale are shown in the following formula, in which GFP = global functional performance, GS = grip strength, WV = walking velocity, and BS = button speed: GFP = GS × 0.38033 + WV × 0.40709 + BS × 0.40508 Figure 2 shows frequency distributions for the three primary scales and the derived global scale.
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Raw scores were converted to T-scores, using Danish norms, for each of the nine primary scales and a Global Severity Index (GSI) scale prior to data analysis.
This measure consists of five primary scales, which cover five dimensions and a total scale.
The three groups were significantly different on all eight primary scales except somatic complaints, the two secondary scales for internalizing and externalizing problems, and the total score.
Nevertheless, correlations > .70 occurred between six subscales and the correlation.76 between the two primary scales Incoherence and Discontinuity was higher than expected.
The two primary scales "Discontinuity" and "Incoherence" seemed to differentiate with a similar quality between the groups, both reaching nearly big effect sizes with f= 0.36.
Differences for the eight primary scales of the YSR were highly statistically different (Wilks Lambda = 0.76; F = 10.47; df = 16,1162; p <.001).
The high scale reliabilities α, with.94 for the total scale Identity-Diffusion,.85 and.92 for the two primary scales Discontinuity and Incoherence, and.70 to.83 for the subscales, are expected to further improve in the next pilot test with adapted item wording.
The reliability coefficients were α = .94 for the total scale "Identity Diffusion", α = .85 and.92 for the two primary scales "Discontinuity" and "Incoherence", and between α = .70 and.83 for the subscales.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com