QUESTIONNAIRE RELIABILITY CHECKING
Questionnaire is a research instrument for gathering information from the respondent through research questions formulated from the objectives of the study.
A questionnaire is not reliable until the internal consistency has been tested by conducting a pilot study of the questionnaire where Cronbach’s Alpha Coefficient Test is implemented.
Cronbach’s Alpha Coefficient Test is a reliability test conducted with SPSS in order to measure the internal consistency.
The following are the ranges of Cronbach’s Alpha Coefficient Test considered as:
| Excellent | 0.93-0.94 |
| Strong | 0.91-0.93 |
| Reliable | 0.84-0.90 |
| Robust | 0.81 |
| Fairly High | 0.76-0.95 |
| High | 0.73-0.95 |
| Good | 0.71-0.91 |
| Relatively High | 0.70-0.77 |
| Slightly Low | 0.68 |
| Reasonable | 0.67-0.87 |
| Adequate | 0.64-0.85 |
| Moderate | 0.61-0.65 |
| Satisfactory | 0.58-0.97 |
| Acceptable | 0.45-0.98 |
| Sufficient | 0.45-.096 |
| Not Satisfactory | 0.40-0.55 |
| Low | 0.11 |
But according to Griethuijsen et al (2014), the threshold or cut-off as an acceptable, sufficient or satisfactory level is normally seen as ≥0.70 or >0.70.
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