Google has virtually unlimited resources for discovering frustrated users. Amazingly though, in a new study they articulated a simple way to determine if a Google searcher is becoming frustrated.
“use of question queries, use of advanced operators, spending more time on the search results page, formulating the longest query in the middle of the session, and spending a larger proportion of the time on the search results page.”
I found this in a study referenced on ReadWriteWeb. Google says that it hopes that the findings could help them to build “a model that will one day make it possible for computers to detect frustration in real time”.