“An experiment had students rate lecturing professors with the sound off. Their ratings closely mirrored evaluations of students who went through the courses with the same professors.”

“The speaker instructs his audience to cheer wildly at the word tomorrow -- then forgot. When he used the word building toward the climax of his presentation, he was so started he fell off the stage.”

“An experiment had students rate lecturing professors with the sound off. Their ratings closely mirrored evaluations of students who went through the courses with the same professors.”