哈佛大学的一项类似研究则从历年58场美国州长选举的民主/共和两党竞选对手身上各选取10秒钟无声剪辑，要求被试者观看并判断胜负，并发现这些人的预测因素占了选举变化量的20 % — —比经济表现变量所产生的影响更大。
A similar study at Harvard, in which people were shown 10-second silent video clips of 58 elections, found that viewers’ predictions explained 20% of the variation in the two-party vote – a more powerful variable than economic performance.