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4.5 Reliability Test

According to Said (2018), he agreed with the statement of reliability test is one of the most significant components for test quality which
consists of consistency, reproducibility and examinee’s performance on the test. Essentially, any measurement of the reliability that focuses
on the consistent measure level of a concept and the Cronbach’s alpha is one solution for researcher to evaluate the strength of data consistency
(Garson, 2012). Besides, Cronbach's alpha also used to check the stability of the instrument measuring for each variable. Hence, Hair et al.
(2016) listed the value for reliability analysis that can be clarified based on the strength using rule of thumb as shown in Table 4.5 below and
followed by the results of Cronbach’s alpha value for each variable of this study respectively.

Table 4.5: Rule of Thumb of Reliability Analysis (Hair et al., 2016)

Alpha Coefficient Range Strength of Association
< 0.6 Poor
0.6 to < 0.7 Moderate
0.7 to < 0.8 Good
0.8 to < 0.9 Very Good
0.9 > Excellent

Table 4.6: Result of Reliability Test

Construct of Measurement Items No. of Cronbach’s Alpha
IV/DV Items
Knowledge 1. I believe that fraudulent dietary supplements will cause bad 4 0.713
side effects.
2. Fraudulent dietary supplements will increase the risk of
developing chronic disease.
3. Knowledge about fraudulent dietary supplements help me to
avoid bad side effect.
4. I will increase my knowledge to prevent myself from buying
fake dietary supplements in the market.
Attitude 1. It is important for me to be more careful before buying 4 0.741
fraudulent dietary supplements.
2. I think that fraudulent dietary supplements will cause losses if I
spend on them.
3. I always check the ingredients of products to avoid fraudulent
dietary supplements.
4. I always check the information of products to avoid fraudulent
dietary supplements.
Subjective Norms 1. My close contact will play an important role to stop me from 4 0.760
taking fraudulent dietary supplements.
2. I am confident to avoid fraudulent dietary supplements because
of advice from family and friends.
3. I will avoid taking fraudulent dietary supplements if there are
negative reviews about the product.
4. I will not consume fraud dietary supplements due to advice
from the doctor.
Perceived 1. There are factors outside of my control that could prevent me 4 0.703
Behavioural from taking fraudulent dietary supplements. Eg: Viral news.
Control 2. I have complete control over myself to avoid from taking
fraudulent dietary supplements.
3. It depends on me whether I want to take fraudulent dietary
supplements or not.
4. There are lots of information that influence me to not consume
fraudulent dietary supplements.

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