Just a quick aside on this conversation, THIS does not apply to this study, but gives you an idea of why research studies are sometimes unusual and it important to follow instructions as given on the study, even if sometimes weird or unusual.
Let us say you are participating in a study and you are told that you are supposed to take a 50 page survey on your sleeping habits. You are placed in room attached to a hallway with a drinking fountain. You are given 1 glass full of water.
For every person given 1 glass of water, a second person is given an plastic cup full of the same amount of water.
You complete this long study. At the end, you find out that they were not checking to see what you answered on the test, but checking how many times you visited the drinking fountain. They were actuallly comparing the groups with the glass of water versus the plastic cup of water to see if there is a difference between the two. Also, each group could have been given a survey about sleep, but the second one talked A LOT about dreams about water, the ocean, and referenced liquidds a lot. So, they were testing how this affects your rate of going to the drinking fountain. They may also have been checking to see if you eventually smash the glass or plastic cup against the wall in frustration for taking a 50 page test...
Trust the study, just follow the directions.
