Age Assortativity. The percent of contacts between students in the surveyed grades and various age classes are shown for 4a) group primary links and 4b) random contacts. The highest percent of contacts are highlighted in pink. Assortativity is the tendency of a particular age class to assort with another.
Glass and Glass BMC Public Health 2008 8:61 doi:10.1186/1471-2458-8-61