Icarried out a series of experiments testing the effect of caffeine on mice. i used two mice. i fed one mouse caffeinated water and fed the other plain water. i then measured the ability of each mouse to find its way through a maze. i timed their progress. my results were exciting and conclusive, the caffeinated mouse found his way through the maze much more rapidly and accurately than the non-caffeinated mouse. i sent my results to a peer-reviewed journal but they rejected my paper. they said the results were not valid. why?

Asociologist wants to study a culture that occurs in some women’s prisons: “state families,” in which individual prisoners take on certain roles within a group of like-minded prisoners. there is previous evidence that younger prisoners will use older inmates who play the roles of grandparents as a resource before they will turn to staff for and advice. the lieutenant in charge of a dorm of long-term prisoners offers to gather volunteers to speak to the researcher and also offers to vouch for the integrity of the researcher. the use of this staff is: a valid use of a statistical technique referred to “snowball sampling” wherein the inclusion of the first subject leads to the recruitment of another one subject.a useful tactic in obtaining a sample of prisoners who both meet the criteria and who will be honest with the researcher.wrong and is prohibited; subject selection needs to be free from intervention by prison authorities or prisoners.acceptable only when the researcher’s irb grants a special waiver.