There are two types of experiments that a scientist can perform. The first is to change one condition of the status quo and observe the results. A key element of this type of experiment is that one must know the status quo in order to know what is an outcome attribrutable to the change.
Therefore it often required to have experiments of the second type, like CHEERS, Children's Environmental Exposure Research Study, where as many details of the status quo are noted with as little change to the system as possible. In this case, the goal is to measure the chemicals that children absorb from their environment. The thrust of the experiment is made very clear on the website, the goal is to measure the effects of normal life, as shown by the following question and response:
Is there any risk to me and my family?
No. You and your child will not experience any risks from participating in this study.
o We will not ask any parent to apply pesticides in their home to be a part of this study.
o You are not required to change any of your regular household routines.
One last time, this is a passive experiment. Any changes in the environment of these children would nullify the value of any data gathered. There are no lab rats here.
BTW, this Gamer is in no way associated with Gamersnook.
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