1
vote
1answer
34 views

Correlations within Factor in a psychometric measurement instrument

I am working with results of a psychometric test. There are twelve factors and each have three subfactors. My problem is that one of the subfactors correlates very highly 0.3 to 0.7 with subfactors of ...
5
votes
3answers
6k views

Is it acceptable to use Cronbach's alpha to assess reliability of questionnaire composed of categorical and conditional items?

Background: I have data on a questionnaire made up of categorical factual items. Some of them are binary and others have more than two categories. For example: ...
10
votes
2answers
8k views

How to transform ordinal data from questionnaire into proper interval data?

Are there any straightforward methods of transforming ordinal level data into interval level (just as there are for doing it the other way round)? And performable in Excel or SPSS? Having the data, ...
3
votes
1answer
1k views

Data transformation for Principal Components Analysis from different Likert scales

I have data from a survey comprised of several measures that used different Likert-type scaling (4-, 5-, and 6-point scales). I would like to run a principal components analysis using the data from ...