The first experiment they did involved two groups of volunteers and a specially designed video game. The first group had to select an object from a table in one room and exchange it for an object on a different table in another room. The second group had to do same task between tables in the same room. As regular intervals,the researchers the asked the participants to name their object. Participants in the second group were able to recall what it was,but those in the first took much longer to remember. The only difference between the two group was that the first had to pass through a doorway. This led the scientists to believe that the doorway could be responsible for the loss of memory.