Test to Destruction
"Test to Destruction" is a novelette by Keith Laumer from Harlan Ellison's science fiction anthology Dangerous Visions. It also appears in A Plague of Demons and Other Stories, a posthumous Laumer omnibus edited by Eric Flint and published in 2003.Plot
The leader of a rebellion is questioned in a mental torture device chair. An alien mind probe finds him as the most powerful mental emission from the planet at the time. The aliens try to test him to destruction.