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How can I convert different point Likert scales for all questionnaires in a survey?
The most common way is to convert all items to z-scores, where the z score for each respondent is z = (respondent’s item score minus item mean) divided by (item standard deviation).
How do you change a rating scale?
This is simple when the scale starts at 0—just subtract the rating from the highest possible rating (e.g., a rating of 0 on a 0–10-point scale reverses to a 10, a rating of 10 becomes a 0, and the midpoint rating of 5 stays a 5). You do the same thing when the scale starts at 1.
Can we change the Likert scale?
Yes, you can do it!
How do you convert from one scale to another?
For example, if the scale factor is 1:8 and the real measurement is 32, divide 32 ÷ 8 = 4 to convert. To convert a measurement to a larger measurement, simply multiply the real measurement by the scale factor. For example, if the scale factor is 1:8 and the measured length is 4, multiply 4 × 8 = 32 to convert.
How to convert a 5 point scale to a 7?
Y = (B – A) * (x – a) / (b – a) + A. That looks just a little messy, but let’s apply it to the example of a 5-point scale to be converted to a 7-point scale. Since the minimum of the 5-point scale is 1, we have a=1, b=5 in the first transformation. Similarly for the second transformation, we have A=1, B=7.
How many choices are in a 100 point scale?
However this only gives the respondents 5 choices out of what should be 100. Where it should really be 1 = 1 to 20, 2 = 21 to 40, 3 = 41 to 60, 4 = 61 to 80 and 5 = 81 to 100. So say someone answers a question with 4 and I convert this to fit a 100 point scale.
How to convert a 5 point Likert scale to a percentage?
Essentially I’m scaling a 5 point Likert scale up to a 100 point scale. Where the values a respondent gives become equal to 1 = 20, 2 = 40, 3 = 60, 4 = 80 and 5 = 100. However this only gives the respondents 5 choices out of what should be 100.
Can you change the scale from 5 to 7?
I prefer to leave the 7-point scale as is, and expand the range of the 5-point scales to match, as follows: That recode increases the range, while maintaining equal distances between the 5 categories. (Terans’ suggested recode from 5 points to 7 introduces unequal distances, without any obvious justification.)
https://www.youtube.com/watch?v=BBLmHJCPaSw