In MCA, it would be useful to add the analysis of intracontributions to variable absolute contributions from category opppositions proposes by Brigitte Le Roux and Henry Rouanet:
Brigitte Le Roux and Henry Rouanet (1998). "Interpreting Axes in Multiple Correspondence Analysis: Method of Contributions of Points and Deviations". In Blasius, Jörg and Greenacre, Michael (eds.) Visualizing Categorical Data. San Diego: Academic Press, pp. 197-220.