Re: Marijuana Detection Windows That Drug Courts Use
The reason you find such discrepancy is because all the research you are reviewing are based on surveys and anecdotal evidence, not true scientifically valid research. There really is no scientifically valid research studies on this topic. The paper you quote even confirms this:
The reason survey research like this varies so widely is because the surveyors can only go by what the surveyees (is that a real word?) admit to. And, especially about topics like illegal drug use, it is a given that some percentage of people will lie. So, for example, when a percentage of people in the survey say, "Oh, I haven't smoked weed in the last 35 days," a subgroup of that percentage will actually have smoked more recently than that...and that skews the numbers when they still "piss hot." Also, there will be a percentage of responders who, while they have not DIRECTLY smoked weed in the past XX days, will still have been in environments where weed was being smoked and ingest it second-hand.
Anecdotally, I went through boot camp (back when dinosaurs roamed the earth) with a man who was on a marijuana waiver and was tested throughout boot camp. After 60 days, he was still "pissing hot"...and I am confident that he was not using during that time.
As different individuals metabolisms will work at somewhat different rates, nobody can predict exactly how long a given substance will clear from a specific person's system. The best that can be accomplished is a guideline or "average" metabolism rate...and that will vary from study to study.
To make a scientifically accurate study, the researchers would need a test group (large enough to be statistically viable) of people who smoked a controlled amount of marijuana, at a controlled frequency, for a controlled period of time. Then, stop all marijuana use among the group (with controls to ensure compliance!) while conducting regular testing of the residual marijuana levels in the subjects. The legal issues involved, let alone the ethical ones, of conducting such a study are prohibitive as the researchers would essentially have to create a large test group of chronic marijuana users!
Behind the badge is a person. Behind the person is an ego. This is as it should be, person at the center and ego to the back.