4.108 Multiple choice: Effect of response categories A study (N. Schwarz et al,,

Question

4.108 Multiple choice: Effect of response categories A study (N. Schwarz et al,, Public Opinion Quarterly, vol. 49 1985, p 388) asked German adults how many hours a day they spend watching TV on a typical day When the possible responses were the six categories (up to 12 hour, 12 to 1 hour, 1 to 112 hours,, more than 2 1 2 hours ) 16% of respondents said they watched more than 2 1 2 hours per day, when the six categones were (up to 2 1 2 hours, 2 1 2 to 3 hours, , more than 4 hours), 38% s id they watched more than 2 1 2 hours per day a. The samples could not have been random, or this would not have happened. b. This shows the importance of question design, especially when people may be uncertain what the answer to the question really is C. This study was an experiment, not an observational study

Explanation / Answer

The correct option is .

b. This shows the importance of question design, especially when people may be uncertain what the answer to the question really is.

When we look at the percentage of respondents who said they watched more than 2 and 1/2 hours a day, the percentage changes dramatically from 16% to 38% when the range of the options given are changed. Range of options should have a minimal effect on these percentages.

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