B. Perceived Barriers to Healthy Eating
Cronbach‟s alpha was used to test all measures in the
perceived barriers concerning the scale‟s internal consistency
with cut-off value of 0.7 as acceptable level of reliability or
internal consistency [27], [28]. The overall score of measure
of perceived barriers is 0.96, which indicated that all items
were good in measuring the same underlying construct.
The study carried out exploratory factor analysis (EFA)
with the 22-item pertaining perceived barriers to healthy
eating, to identify underlying structure of relationships
among individual items. Principal component analysis (PCA)
with varimax rotation was employed. Using scree test
criterion, four factors were suggested to be retained. Items
which were cross-loaded were eliminated and only items
with a factor loading greater than 0.5 were included in the
analysis. Thirteen items were retained in the final analysis.
The Kaiser-Meyer-Olkin (KMO) measure of sampling
adequacy was 0.92, exceeding the recommended value of 0.6
as the minimum value for a good factor analysis [29]. The
overall significance of the correlation matrix was 0.000 with
the value of Bartlett‟s test of sphericity at 13549.24.