The art of sound pictures (1930)

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Testing Subjects for Their Reactions to Screen Episodes Breathing, blood pressure, electrical changes, and variations in grip were measured while the subjects watched the screen. The experimenters, Dr. Marston and Olive B. Richard, may be seen in the background, with three assistants seated near the subjects to be tested. Testing Reactions to a Compliance Episode Ramon Navarro, in The Student Prince, is being forced to take up the reins of a kingdom when he would rather remain in the role of the student prince.