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Studies of the effect of viewers' involvement in television programs on their responses to commercials have produced varied conclusions. Some researchers argue that a high level of program involvement inhibits viewer processing of commercial messages, a conclusion based primarily on the finding that viewers demonstrate better recall for commercial messages when program involvement is low. For example, Bryant found recall highest for a beverage commercial when it interrupted a minimally involving moving wave pattern, with recall decreasing somewhat when the commercial interrupted a moderately involving portion of an action-adventure show and falling substantially at the program's climax. Krugman, however, argues that the persuasive impact of commercials increases as interest in the program increases. Krugman found viewer attitudes toward a commercial sponsor to be less positive when commercials appeared during programs with "natural breaks" (talk-show and variety segments, assumed to be low-involvement) than when they appeared in an "interrupted context" (movies and documentaries, assumed to be high-involvement). Finally, Lord concluded that certain program content induces viewers to commit a large proportion of their attention to its processing, minimizing the efficiency with which they can process information conveyed by a commercial. This result appears to account for the recall effects observed in earlier studies such as Bryant's. Lord postulated that beginning a commercial with an attention- engaging device would moderate the expected impact of high program involvement. : Reading Comprehension (RC)