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In 1954 A. C. Nielsen Corp., the dominant audience survey company, introduced a new device, called the Recordimeter, into the NAC diary sample. It sat on top of each TV set in the diary home, and its purpose was to "jog the laggard record keeper" to make entries current (by three short light flashes, plus three short buzzers each half hour). The Recordimeter also provided a measurement basis for rejecting diaries that materially overstated or understated tuning as measured by the Recordimeter. (The diary keeper jotted down in the diary the number of set-tuning minutes recorded by the Recordimeter.)
Thanks to Matthew D'Asaro, for purchasing this item and donating it to the musuem.
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