Describe the replicated interrupted time-series design on the relation between the availability of television and the incidence of larceny. Why did it provide a clue about a causal link between television content and crime?
What will be an ideal response?
Hennigan, Del Rosario, Heath, Cook, Wharton, and Calder (1982) looked at larceny rates in cities before and after television became prevalent. There were two time periods during which television ownership jumped; cities acquired television stations during one of the two periods.. During the first period, those cities with high television ownership experienced a higher increase in larceny than other cities; when the second set of cities experienced prevalent television ownership, their crime rates increased.
This time-series design allowed a tentative conclusion about a causal link between television watching and increased crime because the crime rate was most affected when television became prevalent. Prior to and after the surge in television ownership, the two sets of cities were comparable in larceny rates; only the introduction of television was associated with an upsurge in the crime.
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