Allows researchers to use prior information on groupings of genes and to specifically investigate groups of genes that interest them from a biological point of view. When researchers have many candidate pathways, available e.g. from gene ontology databases or programs, the global test can be used to find promising pathways. Special attention is given to visualizations of the test result, focusing on the associations between samples and showing the impact of individual genes on the test result. Glotest Special include graphs to search for outlying samples and diagnostic plots to judge how much each individual gene contributes to a significant test result for the group.