Why do we need a Likert scale? Let's assume you have formulated a hypothesis in which a variable that cannot be measured directly, a so-called latent variable, occurs. So how do you measure this variable in your questionnaire?
Latent variables are, for example, physical well-being or environmental awareness. Why are these variables not directly measurable? Of course, you could simply ask in your questionnaire, "What is your level of environmental awareness?"
However, you will find it very difficult or very inaccurate to measure environmental awareness with just this one question, because environmental awareness consists of several dimensions.
In order to be able to adequately measure latent variables such as environmental awareness, likert scales are now used.
https://datatab.net/tutorial/likert-s...
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