Tagged Questions

0
votes
0answers
161 views

Survey Data - Factor Analysis

I was hoping you could help with this question. I have a survey, a 30-item instrument. I've got 18 responses back from this. I also have a paper in which they've done a principal axis factor ...
8
votes
2answers
1k views

Assessing reliability of a questionnaire: dimensionality, problematic items, and whether to use alpha, lambda6 or some other index?

I am analyzing scores given by participants attending an experiment. I want to estimate the reliability of my questionnaire which is composed of 6 items aimed at estimating the attitude of the ...
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 ...