We are here to advise you on the appropriate number of respondents; this differs from one Happydemics product to another.
For Brand Lift, 250 exposed and 250 unexposed (or 150 ad recallers and 150 non-ad recallers) is enough to provide you with a reliable sample and a robust analysis.
For Brand Performance, 1 000 respondents in total are needed to have robust, reliable results and to observe significant differences from one wave to the next.
In order to read your results correctly, here are some simple rules to keep in mind:
Between 50 and 80, they should be seen as broad trends,
From 80 respondents onwards, strong results start to emerge.