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The head of research for Sesame Street in the early years was a psychologist from Oregon, Ed Palmer, whose specialty was the use of television as a teaching tool. When the Children's Television Workshop was founded in the late 1960s, Palmer was a natural recruit. “I was the only academic they could find doing research on children's TV,” he says, with a laugh. Palmer was given the task of finding out whether the elaborate educational curriculum that had been devised for Sesame Street by its academic-advisers was actually reaching the show's viewers. It was a critical task. There are those involved with Sesame Street who say, in fact, that without Ed Palmer the show would never have lasted through the first season. Palmer's innovation was something he called the Distracter. He would play an episode of Sesame Street on a television monitor, and then run a slide show on a screen next to it, showing a new slide every seven and a half seconds. “We had the most varied set of slides we could imagine,” said Palmer. “We would have a body riding down the street with his arms out, a picture of a tall building, a leaf floating through ripples of water, a rainbow, a picture taken through a microscope, an Escher drawing. Anything to be novel, that was the idea.” Preschoolers would then be brought into the room, two at a time, and told to watch the television show. Palmer and his assistants would sit slightly to the side, with a pencil and paper, quietly noting when the children were watching Sesame Street and when they lost interest and looked, instead, at the slide show. Every time the slide changed, Palmer and his assistants would make a new notation, so that by the end of the show they had an almost second-by-second account of what parts of the episode being tested managed to hold the viewers' attention and what parts did not. The Distracter was a stickiness machine. “We'd take that big-sized chart paper, two by three feet, and tape several of those sheets together,” Palmer says. "We had data points, remember, for every seven and a half seconds, which comes to close to four hundred data points for a single program, and we'd connect all those points with a red line so it would look like a stock market report from Wall Street. It might plummet or gradually decline, and we'd say whoa, what's going on here. At other times it might hug the very top of the chart and we'd say, wow, that segment's really grabbing the attention of the kids. We tabulated those Distracter scores in percentages. We'd have up to 100 percent sometimes. The average attention for most shows was around 85 to 90 percent. If the producers got that, they were happy. If they got around fifty, they'd go back to the drawing board.
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Malcolm Gladwell (The Tipping Point: How Little Things Can Make a Big Difference)