How many respondents are used in the test?

EH recruits 150 respondents for each creative tested. And they also have a Control group of 100 per campaign so you can get an ‘uplift’ against the Control. This means if you test:

• 1 x creative in 1 x campaign, your total sample size is 150 + 100
• 2 x creatives in 1 x campaign, your total sample size is 150 + 150 + 100
• 2 x creatives in 2 x campaigns, you total sample size is 150 + 100 + 150 + 100

However the respondents are included in the pricing so you don’t pay separately - you just pay for the number of tests you want to run.