I am trying to make it easier for respondents by not sending three separate links. How easy will it be for me to filter the data results by variable once I am done, before exporting it to SPSS?
This approach is confusing to respondents. If you have 3 variables used for one research survey, why do you use 3 different scales? At the end you would probably have to make them uniform; why do more work? and potentially invite defect into the instrument due to confusing scales. Think in the respondent's perspective. They have to shift gear in their mind and re-orient themselves when they come to different section of your survey.
The last section is (1,2,3,4,5); now the second section is (1,2,3,4,5,6,7), and the next section (1,2,3,4,5,6,7,8,9,10). Why? i it because each literature for each variable you used uses different scale? You do not have to duplicate their scales. You construct your own survey, you may make a uniform scale.
Moses - A good response from Paul Louangrath that why to use 3 different scales for 3 variables. This approach will definitely make your methodology very complex. It is better to use a uniform scale. For example, if you are using Likert scale, you have the option to use variations of Likert scale like 4 point or 5 point or 7 point scale for three different rating-scale question types. Researchers use a rating scale in research when they intend to associate a qualitative measure with the various aspects of a product or feature.
Yes, you can send all scales in one survey link. But as other have said above, it will be beneficial to use one type of scale for all three variables. You can filter your data even in SPSS. In fact having a single data set will help you with more options of analysis: correlation, comparison etc