Case viewing system, computer program for same, and method for controlling same

A game viewing system (100) in which game images are distributed to display devices (24) of a plurality of game viewing users, the game viewing system (100) being provided with: an operation receiving means (111) that receives viewer operations by the plurality of game viewing users; an evaluation means (112) that evaluates the mutual relationship between viewer operation inputs performed by each of the plurality of viewing users; and an effect control unit (113) that controls an operation effect corresponding to the viewer operation such that the operation effect changes on the basis of the evaluation result of the correlation. 一种观赛系统(100)，在该观赛系统(100)中，游戏影像被分发到多个观赛用户的显示装置(24)，观赛系统(100)具备：操作接受单元(111)，其接受由多个观赛用户进行的观众操作；评价单元(112)，其评价由多个观赛用户中的各观赛用户进行的观众操作的输入的相互关系；以及效果控制单元(113)，其控制与观众操作对应的操作效果，使得该操作效果基于相互关系的评价结果而变化。