 We systematically varied cluster size, number of clusters, number of different features between clusters, effect sizewithin each different feature, and cluster covariance structurein generated datasets .
<clarity>  We systematically varied cluster size, number of clusters, number of different features between clusters, effect sizewithin each different feature, and cluster covariance structurein generated datasets .
 We systematically varied cluster size, number , separation (effect size), and covariance structure .