The reliability and validity analysis was also conducted by Durak (22) and The Cronbach Alpha reliability coefficient
was found as 0,86.
Study based on Generalizeability theory Who?
The Turkish version of the instrument has been tested for validity and reliability in 2008.17 The tool has a high level of internal consistency reliability coefficient
(a =0.81), and subscales' internal consistency reliability coefficients
varied between 0.72 and 0.85.
was calculated through Cronbach's alpha.
For this study, a reliability coefficient
of.76 (IC 95 %:.70 -.81) was obtained.
In the analysis of data, numbers, percentages, the Pearson product-moment correlation coefficient, the Cronbach's a reliability coefficient
, Guttman split-half reliability coefficient
, and the Spearman-Brown prediction formula were calculated.
Cronbach's [alpha] was .87, test-retest reliability coefficient
was .83 (p < .001), and split-half reliability coefficient
was .82 in Wang et al.'s study.
The overall alpha reliability coefficient
of OSDI was 0.74, and the alpha reliability coefficients
of "eye symptoms," "visual function," and "environmental triggering factors" were 0.67, 0.71, and 0.86, respectively, indicating that the internal consistency reliability of the scale was relatively high.
reliability based on average correlation among items within a test and examines the degree to which MCQs measure the same domain of knowledge.13,14 Internal consistency is routinely measured by calculating reliability coefficient
.13,14,17 There are different statistical ways to calculate internal consistency but commonly used method is 'coefficient alpha.17
This scale is based on 22 items having satisfactory value of alpha reliability coefficient
. Scores on the Indecisiveness are used to measure general incisiveness.
The reliability coefficient
indicated how well the items are correlated with one another.
The Cronbach [alpha] reliability coefficient
is a weighted standard variation average which is found by comparing the total variance of the items with the general variance.