On the Effect of None Position for CBC Studies
In December 2018 we fielded a CBC study using Lighthouse Studio, collecting 201 respondent records via Amazon’s Mechanical Turk panel. The subject matter was restaurant choice and we used a screener question to qualify respondents who ate at restaurants at least once per month. We were interested in whether placing the None concept as the right-hand concept vs. placing it as a concept along the bottom of the task would affect the frequency of None usage. We found that the placement of the None concept did not lead to a statistically significant difference in the None usage.