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Responses to the five categories were summed with equal weights resulting in a scale with a Cronbach alpha value of 0.93.
Clearly, the value of alpha is based on the correlation between items and the number of items in a scale, with scales with fewer items tending to have lower alpha values [ 13- 15].
We therefore included academic performance in our socioeconomic indicators by asking the participants to rate their school performance (based on their recent marks) in a scale with four choices ("excellent"; "very good"; "good"; "fair").
In contrast, the conventionalized TM-IEC C1galt1 −/− mice developed moderate to severe inflammation, relative to the conventionalized WT counterpart, with scores values of 4 and 5 in a scale with a highest possible value of 6 (P < 0.001) (Fig. 1C).
This procedure resulted in a scale with good psychometric parameters: The 11-item-FQLP is a one-dimensional construct with high internal consistency and a very high reliability, represented by a very high Cronbach's α.
All corrected item-total correlations were above the minimum recommended level of 0.20 [ 28] for being included in a scale, with the exception of those for "speaking" and "smiling".
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Cronbach's α is a measure of how well each individual item in a scale correlates with the sum of the remaining items.
In these plots, MCR values are plotted in a linear scale with a minimum value of 1 on the vertical axis.
The volume is given in a 0 100 scale with a baseline of 50.
The chart below also includes NBC/WSJ data, which measures favorability in a positive/negative scale, with a "neutral" answer category).
Figure 1 Simplified material flow of a circular economy in a global scale with health and environmental risks.
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