These scales have been found by coefficient alpha, split-half method, and test-retest reliability testing to be internally consistent and highly reliable [ 97].
Ramped half and half method, applied by quite a few researchers, e.g., Koza (1992) and Tay and Ho (2008), is used to generate the initial population.
The main limitation of this study is related to the infeasibility of applying a split half method, which involves dividing the total sample in two and correlating the results, as a way of assessing the reliability of a test.
The split half method was used to estimate the reliability of the questionnaire (Rust and Golombok, 1989).
The inhibitory activities of compounds 1, 2, 6, 8, 10 13 and lycoricidine derivatives (L1 L7) (Fig. 2) against TMV were tested by the half-leaf method and reported in Table 1, all of the compounds exhibited moderate inactivation effect.
"Recipes" were scant lists of ingredients, half methods, several things on the go at once – fine for the practised chef, but brand new to me.
A reliability test was conducted with respect to internal consistency, which was tested by Cronbach's alpha, and stability (split-half method, which is equal to test-retest), which was tested by Spearman-Brown coefficient and Guttman split-half coefficient.
To test internal consistency, global Cronbach's alpha was estimated and the split-half method was also applied.
The Cronbach's alpha coefficient was.936 and the split-half method yielded a correlation of r=.92, indicating that the scale has a high overall internal consistency.
The split-half method was used to measure instrument reliability and to statistically separate items to differentiate the pretest from the posttest.
Next, the study data were randomly divided into two samples as a split-half method 24 25: one for a prediction analysis (sample 1, n=1450) and the other for a validation analysis (sample 2, n=1450).
