While the ACORN assessment (Nehm and Ha 2011; Opfer et al. 2012) contrasted items with plants and animals, analyses of student responses to those items quantified the frequency of intuitive responses rather than identifying differences in types of intuitive responses for plant versus animal items.
For observed items, quantified servings were multiplied by per-serving energy values and summed across items for each meal per child; a similar process was used for reported items.
The internal consistency of instrument items quantifies how similarly in a interrelated fashion the items represent an outcome construct that the instrument is aiming to measure [ 4], whereas reliability is defined as the squared correlation between true score and observed score [ 3].
The cognitive design approach has the advantages of explicating construct validity at the item level because the level and the source of cognitive complexity in an item are quantified.
The latter item was quantified using a dichotomous proxy variable – living in a brick house (versus shack, hut, backyard dwelling, "wendy house" [simple wooden one-room structure], or apartment) – because it stratifies relative higher income (who could afford to rent or own a brick house) and lower income families within the population surveyed in this study.
Each of these items was quantified on a (0 10) numerical scale.
Correlation analysis results showed that there were good relationships between the settlement and the slope direction, embankment height, ground temperature and ice contents when some of the later items were quantified.
Each of the 16 items was quantified using a scale from 0 to 100, and the average was calculated.
In cohorts where food items were quantified in daily grams, uniform weights were assigned as one serving on a food-by-food basis.
Item information quantifies with how much precision an item can measure the latent trait given the location of the provisional person estimate [ 22].
As a result, nearly every stress-induction study includes at least one self-reported Likert scale or VAS item to quantify participants' distress.
