I intend to do an exploratory factor analysis among items that have different types of measurements: for example, some items have bounded scales (1-100%), some items take small and other large values (different units indeed, such as dollars or hours).
I've been reading a lot and haven't found a negative answer, i.e. that it is not possible to do such analysis with such varied types of items; however, every example I came across is based on items that take the same values (e.g. 4-value likert scales from questionnaires).
In sum, does anyone have a clear answer (and reference?) on this matter?