Table 2.

Characteristics of artificial datasets

Dataset	No of subgroups	Data type	Subgroup scoring	Subgroup n
A1	3	Interval and dichotomous	Discrete scoring bands	333,333, 334
A2	3	Interval	Overlapping scoring bands	333, 333, 334
A3	6	Interval and dichotomous	Overlapping scoring bands with two distinct subgroups on each variable	166, 166, 166, 164, 168, 170
A4	3	Interval	Overlapping scoring bands plus 10 ‘noise’ variables that do not discriminate subgroups	333, 333, 334