 Round 2 did all but what to make things more interesting?
The point of the second test was not to find the difference between cheap and expensive beers but instead to compare a variety of top-of-the-line beers. One aspect of the reward was that they would presumably enjoy the actual testing more--fewer rueful beer descriptions along the lines of "urine" or "get it away!" were expected than in the first round. The other aspect of anticipated reward was the panelists' unspoken but obvious assumption that this time they would "do better" on the test. This was similar in most ways to the experimental approach of Round 1.
 Learned everyone's favorite beers and included those in the samples
 Included some less high quality beers  Asked for people to label type if they could  Added a control drink  Learned everyone's favorite beers and included those in the samples