el, comprises
three BeforeAfter pairs, thus providing extra information about the before
and after endpoints. The researchers included this condition in case any
advantage of Progressive might stem simply from having more images, rather
than because it illustrates a clear progressive sequence. They randomly
assigned 213 participants from MTurk to one of the three groups. Participants
were asked to 'imagine that you have decided to lose some weight', then saw
one of the three ads for a weight loss program ca