Data	method	Before rotation			After rotation
Data	method	variance	variance contribution rate %	accumulation%	variance	variance contribution rate %	accumulation %
Normal set of data	Traditional factor analysis	3.46	49.5	49.5	3.14	44.8	44.8
	Traditional factor analysis	2.80	40.1	89.5	3.13	44.7	89.5
	Robust factor analysis	3.61	51.6	51.6	3.26	46.6	46.6
	Robust factor analysis	2.81	40.2	91.8	3.16	45.2	91.8
Data with an outlier	Traditional factor analysis	4.55	64.9	64.9	3.58	51.2	51.2
	Traditional factor analysis	2.00	28.6	93.5	2.96	42.3	93.5
	Robust factor analysis	3.35	47.9	47.9	3.26	46.6	46.6
	Robust factor analysis	2.98	42.6	90.5	3.16	45.2	91.8
Data with four outliers	Traditional factor analysis	4.65	66.4	66.4	3.47	49.6	49.6
	Traditional factor analysis	1.62	23.2	89.6	2.80	39.9	89.6
	Robust factor analysis	3.61	51.6	51.6	3.26	46.6	46.6
	Robust factor analysis	2.81	40.2	91.8	3.16	45.2	91.8