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Volume 11, Issue 2 (Iranian Journal of Ergonomics 2023)
Iran J Ergon 2023, 11(2): 130-136 |
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Soltanian A R. Studying the Effect of Likert’s Scale Starting Point on Descriptive and Analytical Findings of Questionnaire. Iran J Ergon 2023; 11 (2) :130-136
URL: http://journal.iehfs.ir/article-1-975-en.html
URL: http://journal.iehfs.ir/article-1-975-en.html
Department of Biostatistics, Faculty of Health, Hamadan University of Medical Sciences, Hamadan, Iran , soltanian@umsha.ac.ir
Abstract: (3726 Views)
Objectives: There is currently no consensus on transformation of the starting point of scoring on the Likert’s scale in questionnaires. This study aimed to investigate the effect of the transforming the starting point of scoring on the indices of central tendency, dispersion and the independent t-test.
Methods: The study employed inferential analysis to investigate the effects of transforming the origin of scoring, comparing the results through illustration. A 4-point Likert’s scale, starting with scoring zero and one, was utilized. The Independent t-test was used to compare the mean scores in two groups.
Results: The results of the study showed that transforming of the starting point of scoring from 1 to zero on Likert’s scale only leads to a difference in the value of the tendency to the center. However, dispersion indices and statistical statistics did not showed any difference in both scoring methods.
Conclusion: Changing the origin of scoring in the questionnaires, when total scores exhibit a normal distribution, has no impact on the independent t-test and standard deviation. The only significant affect includes difference on tendency to the center in two scoring systems.
Methods: The study employed inferential analysis to investigate the effects of transforming the origin of scoring, comparing the results through illustration. A 4-point Likert’s scale, starting with scoring zero and one, was utilized. The Independent t-test was used to compare the mean scores in two groups.
Results: The results of the study showed that transforming of the starting point of scoring from 1 to zero on Likert’s scale only leads to a difference in the value of the tendency to the center. However, dispersion indices and statistical statistics did not showed any difference in both scoring methods.
Conclusion: Changing the origin of scoring in the questionnaires, when total scores exhibit a normal distribution, has no impact on the independent t-test and standard deviation. The only significant affect includes difference on tendency to the center in two scoring systems.
Type of Study: Brief Report/Brief Policy |
Subject:
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Received: 2023/10/19 | Accepted: 2023/09/17 | ePublished: 2023/09/17
Received: 2023/10/19 | Accepted: 2023/09/17 | ePublished: 2023/09/17
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