SPSS里要求 interval or ratio level。下面是从HELP DOCUMENTS中引用的。
Data. The variables should be quantitative at the interval or ratio level. Categorical data (such as religion or country of origin) are not suitable for factor analysis. Data for which Pearson correlation coefficients can sensibly be calculated should be suitable for factor analysis.
看看HELP里的例题。里面用了0,1变量。建议看例题。