At this point, Shared is the cardinality of the intersection of the top contexts of the target words.
aPSyn, instead, is the weighted cardinality of the intersection, where the average ranking of the common features is used as a weight, as shown in the equation below: for every feature included in the intersection between the top N features of 1 , ( 1 ), and 2 , ( 2 ), aPSyn will add 1 divided by the average rank of the feature, among the top PPMI ranked features of 1 , 1 ( 1 ), and 2 , 2 ( 2 ).