What are blink tests used for?

To measure what information a visitor takes away from a page having looked at it for just 5–7 seconds
To arrange and organize elements on your dashboard so that visitors naturally gravitate toward the most important elements ﬁrst
In the realm of psychology, they’re used to test how much working memory capacity you’re using when viewing a web page.
To measure what information a visitor takes away from a page having looked at it for just 3–5 seconds

The correct answer is:

To measure what information a visitor takes away from a page having looked at it for just 3–5 seconds.