There are presented a method and system of calculating focus applied to an item (102) among a group of items (101). In embodiments of the invention a focus measurement is decayed from all items (101) and added to the focus item (102). In some embodiments, the focus applied to a focus item is diffused among other items related to the focus item. In some embodiments a display of a focus item and its related items (104) visually reflects their context measurements relative to other items.