Thus, it reveals whether it is possible to trust the data, because high values of alpha (above.70) entail an unbiased set of items and sample (Cohen and Swerdlik, 2009).
In contrast to alpha, the average inter-item correlation is independent of the number of items and sample size when measuring internal consistency.
The grading of the reliability estimates in Table 2 are based on Ponterotto & Ruckdeschel [ 58] and take into account number of items and sample sizes.
As described in Table 2, a semantic-differential or Likert item on its own is most likely ordinal, but a composite score from a measurement scale made up of the sum of a set of a set of interrelated items can take on properties that appear much more continuous than categorical, especially as response options, items, and sample size increase (Carifio and Perla, 2007).
Furthermore, we also conducted subgroup analyses stratified by ethnicity (Caucasian and Asian), source of controls (population-based and hospital-based), matching criteria (more than 2 items and less than 3 items), and sample size (larger than 300 and less than 300).
It is accepted practice to evaluate overall fit to the Rasch model by the use of Bonferroni adjusted p values (i.e., 0.05 divided by the number of items) [ 30], a conservative [ 56] yet widely accepted correction for repeated statistical tests [ 57]. aGradings based on Ponterotto & Ruckdeschel [ 58] and take into account number of items and sample sizes.
Table 2 provides information on the number of items, item variability and sample items from each scale of the questionnaire.
The aim of this study was to investigate the dimensionality or factor structure and measurement properties of the FACT-G using both traditional psychometric analyses, such as Factor Analysis, and item and sample independent models, such as Rasch Models.
These are the fuzzy fraction of nonconforming items, fuzzy sample rate, and fuzzy fraction of nonconforming items and fuzzy sample rate together.
