Stanton-Lazarfield Program Analyzer - System used by the Columbia Broadcasting System (CBS) to pre-test the appeal of a new program with a randomly selected studio audience. Known also as "Little  Annie," the SLPA gathers groups of people in both Los Angeles and New York and invites them to screen filmed materials. They are escorted to a seat equipped with knobs. If they enjoy what they see, they are instructed to press the knob on the right hand of their chair; if displeased they press the left arm of their chair. See also - "Rating Services"  

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