Determined by number of ideas
The sample size of your project will be determined by the number of ideas and the number of tasks that each respondent will see.
Deciding principles are:
- Minimum exposure per idea for the screening tasks is 100.
- No consumer reviews more than 2 ideas in detail.
Recommended minimum sample sizes:
| Number of Ideas: | 5 | 10 | 20 | 30 | 40 | 50 |
| Total sample size: | 200 | 375 | 750 | 1125 | 1500 | 1875 |