Hi All,
I have undertaken some factor analysis on a set of data derived from
Likert type (5 point ordinal) questions.
Other papers on the topic in question have used FA however a reviewer
has pointed out FA requires the data to be at least interval in nature.
What do members of the list feel - is it ever acceptable to use FA on
likert scale variables (if so when, is there any diagnostic tests?) any
references to acceptability of use would be most appreciated.
If not acceptable what would be the prefered way of undertaking a FA
type analysis on ordinal data? I've heard of 'optimal scaling' though
I've never used it.
Best Regards & thanks in advance
Graham
--
Dr G.S.Clarke
Lecturer in Physiology & Biometry
Faculty of Health Studies
University of Wales, Bangor
Fron Heulog
Ffriddoedd Road
Bangor
Gwynedd LL57 2EF
Tel: 01248 383157
e-mail: [log in to unmask]
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