Summary: A teacher gives each student in the classroom a list of words; they are asked to find an anagram, then raise their hand, for each word. The control group gets "tab", "lemon", and "cinerama"; the test group gets "whirl", "slapstick", and "cinerama". After failing to find anagrams for the first two words, and seeing the control group succeed easily, students in the test group can't find anagrams for the third word.