Radio: Radarating

An ultimate in program popularity testing was promised last week by CBS. If its new radar-like spy system lives up to its pressagentry, program directors will be all but able to read listeners' minds.

Instantaneous Audience Measurement Service was invented by Dr. Peter C. Goldmark, 40, CBS's bashful, brilliant chief engineer and color television genius. I.A.M.S.'s listening posts will be little black gadget boxes attached to the family radio in "scientifically selected" homes. These boxes, responding to signals from station transmitters, will flash radio messages back at the rate of one a minute. At the station, these thousands of messages will be...

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