Thursday, June 2, 2011

Phineas and Ferb, Climate Change and Language Barriers



I recently read an article on climate change that made me laugh. Not because it was particularly funny, but because it was about the language discrepancy between the scientific community and the lay person. In this article they attributed the general population's reluctance to believe in climate change to the lack of concrete language used by the researchers. They urged these experts to use more black and white statements and "regular" language. This is the point where I laughed.

Because here's the thing. We just can't do it! When I went to write this blog post I looked for the original article I read but couldn't find it. I did however find a great article here and I love this portion of it:

"Scientists are often compelled by their education to tell you more about what isn't known than what is known. That intellectual and academic honesty allows critics to use the scientists' own honesty as a brickbat to pummel their work. As an example, for the past 20 years when reporters would call and ask whether this flood, or hurricane or that tornado was due to global warming, the entire scientific community studying the effects of increased CO2 in the atmosphere would say, "No single event can be attributed to global warming." That is the truth, and climate change skeptics will use that honesty to say, "See, there's no detectible change." "

As a scientist myself I understand this dilema. The more you study science the more variables you discover and you start getting in to the, well that depends on what the definition of "is" is! And it's true. Define your terms is a common phrase in the scientific community. What do you mean by "change?" It's a valid question to the scientific community and unfortunately the lay comunity just thinks you're being difficult or avoiding the truth, when another scientist would simply define their terms and move on.

So why am I talking about climate change on a forensic blog? Because this language barrier exists every time you take the stand. Not only do we have the barrier between ourselves and the jury, but then you have to throw in lawyers and hoo boy, now you have a third language!

I'm reminded of an episode of my son's favorite show. In Phineas and Ferb, the spy bosses give Perry the platapus a robot, but then tell him that the manual is only in Dutch. Unfortunately they don't have a Dutch to English dictionary, but they do have a Dutch to French Dictionary and a French to English Dictionary. So Perry has to use both dictionaries to figure out how to control the robot.

That's like being an expert witness. You have to translate the attorneys question from legalese into science speak and then translate your science speak into layman's terms for the jury. Here's the problem. There are no dictionaries. When you gain familiarity to the legal community you get to the point where you know what they mean to ask even if that's not quite where they're asking, and over time you begin to answer what they mean to ask as opposed to what they actually asked.

Now, what do I mean by this? In breath testing for example an attorney may ask you "Is this test accurate?" I have always hated this question. Why? Because all the attorney wants to know is, is this test right or wrong. To me, my science side starts piping up and yelling in the background what do you mean by "accurate?" To what degree? And accurate of what? Of what the instrument saw or the body burden of the individual?

To answer that question I would state what I was relying upon and then answer whether the test result met the accuracy requirments as by Rule for what the instrument saw in the breath chamber. Is that what the attorneys were always asking? No, probably not.

And the reason I say that it is probably not is because I often run into attorneys who don't understand how two different test results could both be "accurate." Well, define your terms. What do you mean by accurate? When a scientist answers that question they're going to answer whether they were within the accuracy limits required (10% in Vermont for breath alcohol testing) for what was in the instrument at the time the sample was analyzed. If that isn't what the attorney wants to know then they need to change the question.

Although scientists are often aware that there is a language barrier I find that attorneys are often baffled by it. I have often sat on the stand arguing what appears to be minutea to the attorney but what matters quite a bit to me. It's furstrating because although I may know what they mean by their question I simply can not answer it if the terms are inaccurate.

And this is why the urge to researchers to change their dialogue when speaking about their research is doomed to fail. They are still scientists and they must first and foremost be repsected in that community. A person who speaks in blacks and whites and absolutes is not a scientist and will not be taken seriously by that community. That's not how research works. The scientific process will always be to form a hypothesis and then try to disprove it. The answers will always be that the evidence thus far indicates or research suports x, y and z. It will never be x causes z. It will never be in absolutes.

In order to be effective in the courtroom, expert witnesses need to be able to bridge the language barriers without compromising their scientific integrity. It's a difficult balance because you often do fall into answering what is meant by the question as opposed to what is asked. That is why it is so important to qualify every answer you give with what you are basing your answer on. The problem remains that there are no dictionaries and far too often attorneys or the public may not realize that there even is a barrier present.

How we can work more effectively together and walk that line is a difficult one and if anyone has ideas that have worked well, let me know. To me the best we can do is help the attorneys we work with understand that words matter. They already understand this concept in the court room they just need to understand that there is another language spoken by scientists.

I love how the article I mentioned above ends:

"So, scientists are changing the message. It is a subtle change, but important. When reporters like me ask the question, "Was the flood, or the drought or the tornadoes caused by global warming?" The scientists now respond, "No single event can be attributed to global warming, but we told you this was going to happen.""

To scientists that's the compromise you'll get and it's the best our integrity will allow.

Thursday, April 21, 2011

Personal feelings and the expert witness


I've expressed the statement before of course that the role of the expert witness is to be objective and speak for the science, but no matter how often I've said that, I'm constantly encountering the attitude that it is a personal thing. As if feelings have some sort of place in science. Remember the "There's no crying in baseball!" it's the same thing, there's no emotion in science.

Compare evolution and creationism. Evolution is based on observations in nature, experiments carried out in the lab, and fossil evidence. Creationism is based on feelings. As a scientist I have to look at the evidence and see that the evidence for evolution far, far outweighs the "feelings" of creationism. I'm obviously not in the minority there and that's because that is what science is about.

When an experiment is carried out, the goal of a scientist and all scientific procedure is to disprove the theory, not to prove it. That's a huge distinction and one that is crucial to scientific understanding. Whether I want my theory to be true or not, doesn't matter. At least not to any credible scientist.

Most of my work involves DUI and let me tell you, my personal feelings play no part. Why? Because it's not my job. It's not my job to argue the case, it's not my job to make the decisions. I am not the fact finder. That is a wonderfully freeing thing and I'm not sure why people resist that. My only job is to explain the science and see if everything is working properly. If it is, I say so. If it isn't, I say so. How I "feel" doesn't matter.

Pointing out a problem is not a personal attack. It is the role of the scientist to look at the data and base your opinion on the data, not on what you want the outcome to be. And that's what I always strive to do. The only difference in being an expert witness is that you have to express it in layman's terms so that the non-science community can understand it and make their own decisions.

I've worked for both the prosecution and the defense. I've been thanked by parents who have lost a child to an impaired driver. I've seen people facing the loss of their pension over a mistake. It's not a simple thing.

Thankfully, it's not my job to have feelings about it and any "scientist" that puts their emotions before the data is no scientist at all. I'm human. I'm not cold. I do have feelings of course, but they don't matter. My job is to explain the science, and that's what I do.

Friday, April 15, 2011

Man brings beer to DUI hearing

Some people are just their own worse enemies... Enjoy some light reading on this beautiful Friday!
 
 
 
 
 Man brings beer to DUI hearing
By Associated Press
Posted Mar 23, 2011 @ 01:00 PM

MONTICELLO, N.Y. (AP) — Authorities say a New York man appearing before a judge on a felony drunken driving charge arrived at court an hour and a half late, drunk and carrying an open can of Busch beer.
Sullivan County Undersheriff Eric Chaboty says Keith Gruber of Swan Lake had four unopened beer cans in his bag Monday when he tried to walk through the metal detector at the county courthouse.

The Middletown Times Herald-Record reports that Judge Frank LaBuda asked the 49-year-old Gruber if he enjoyed his "liquid lunch." Gruber said he did, then said he was sorry. The judge revoked his bail and sent him to jail, where he remained Tuesday.

Gruber was arrested Dec. 27 in the town of Liberty and was out on $30,000 cash bail. He has prior DWI convictions.

The judge dismissed Gruber's court-appointed lawyer Monday because Gruber refused to cooperate with him. A phone number listed for Gruber was disconnected.

Friday, April 8, 2011

Killing Superman: The Importance of Good Laboratory Practice

People who are not laboratorians often don't understand the importance of Good Laboratory Practice. And yes, I meant to capitalize each of those words. Whenever you hear a scientist talk about Good Laboratory Practice (GLP) you should hear those capital letters because GLP is not the good practice of measuring twice and cutting once, it's the good practice of paying your taxes.

Good Laboratory Practice standards were first discussed in the 1970s when the realization came to light that you can't always take scientific data at face value. Before that time, the assumption was that the study was always done properly and recorded precisely. Pretty naive when you think about it. That's not to say that any action outside of GLP standards is malicious, all too often it's done out of ignorance, which is why it's so important to have well qualified and fully trained people who understand the importance of GLP.

People who don't understand the importance may balk at GLP because it is detailed, it is rigid and there is very little wiggle room. What does the minutiae matter? Isn't it just the final outcome that matters? Why the obsession with the process?

Killing Superman: A Parable on Good Laboratory Practice

One day in Gotham an analyst at Gotham Laboratories Inc was preparing her Hal 9000 to analyze water samples for Kryptonite levels. Lex Luther was at it again and there were a group of wide eyed orphans clutching teddy bears, stranded on an island surrounded by rising water. It was a sad sight, and Superman was chomping at the bit to go rescue the tiny tots.

There was just one problem. The water surrounding the area was not only fast moving and too dangerous for the mere mortals to rescue the orphans, but it was known to often be contaminated with Kryptonite. It was too dangerous for Superman to plunge in, he needed the laboratory tests first.

The Hal 9000 was calibrated, but when the analyst looked at her low Kryptonite control she could just barely see it. This wasn't good. The standard was at 5ppb. Although a low environmental level, it was the highest level of Kryptonite Superman could function with. Recovery was supposed to be at least 80% so that they could be sure if there was Kryptonite there, they would see it and thus be able to warn Superman. Not seeing the control was just not going to cut it.

Perhaps the standard was old? So the analyst opened a new bottle and ran it again. Nope, no good. Perhaps the calibration standards needed to be re-prepped? So the analyst re-prepped the standards. Nope, still couldn't see the low Kryptonite standard properly.

The analyst had worked at Gotham Laboratories Inc. for a long time so she knew the Standard Operating Procedure and she had done the first two steps for correcting a low control. The next two instructions in the SOP were to troubleshoot the instrument as needed, and then if that didn't work to contact the manufacturer. No problem, troubleshoot as needed. The instructions weren't anymore direct than that because, well... how do you document every possible thing that could go wrong and it's fix? I mean, that's why you have highly trained individuals in those positions.

But alas, Gotham hadn't quite embraced the GLP standards yet and where in another laboratory only the senior level analysts would do the troubleshooting, that wasn't a consideration here. I mean, that's what the checks were for on the instrument. If they didn't pass then you knew it wasn't working right and if it did, then it was. The outcome was simple.

The analyst knew there were things she could probably do like changing the lines or cleaning the cones or giving the Hal 9000 a good pep talk but the water was rising, her boss was being a jerk, the finals of American Idol were on TV and well, the way the Hal 9000 kept calling her "Dave" was creeping her out.

The control just wasn't visible so the answer was simple. She'd just add more. So taking her same low level Kryptonite standard she simply doubled the amount of her aliquot. Restarting her run and ignoring the question of "What are you doing Dave?" she watched for the control's results. It was beautiful! 90% recovery. Now all she had to do was run the water samples, Superman could save the orphans and she could go home.

I mean, after all, she fixed it right? The control passed. Well, not exactly.  She did indeed get her run to pass, but she didn't fix the problem. Whatever was making the Hal 9000 unable to see the low level of Kryptonite was still there but the run passed. Now of course the problem was that the point of the test was not to get the control to pass. The point of the test was to get accurate and reliable results in those unknown water samples. Running the control was just a way to be sure the instrument was working properly.

Those water samples that had been taken so carefully across the gradient of water Superman would have to pass were analyzed and things looked good. They were all below the low level control. Superman would be safe! Hurray!

Her boss was happy, the people of Gotham were happy and Superman went into the dangerous passage to get those poor orphans off that cursed island. Now the roof above the treacherous water was spiked and dangerous so Superman would have to swim, but he knew he could do it safely because the run passed and the Hal 9000 didn't see any Kryptonite in the water.

As Superman swum, he started feeling a little ill and half way there he went under. The crowd was stunned! What could do this to Superman? Only Kryptonite surely and they had tested for that. The run had passed!

Oh, but alas, double spiking the standard hadn't fixed the instrument, it only masked the problem and while it wasn't written anywhere that she couldn't do that; if the analyst had been familiar with GLP she would have known that changing the procedure to make a test pass was wrong and that forcing QC to pass can lead to erroneous results.

But alas, Gotham had no GLP and Superman was dead. Those poor orphans.

And thus the importance of Good Laboratory Practice; because the point is not to get the controls to pass, the point is to get accurate results on those unknown samples.

Thursday, March 24, 2011

Lindsay Lohan and Kombucha


Not the most popular of drinks when you think of hitting the bar, but it's making the press now that a celebrity is involved. Sometimes that fame factor really does help to bring things to attention.

I first encountered Kombucha, a fermented tea, when it was sent for analysis to the laboratory I was working at. We all hovered around the bottle, grimacing at the "floaties" and nearly gagging at the smell. But supposedly some people actually like to drink it...for some reason.

Kombucha is a tea made with bacteria that has a host of claimed health benefits and also a host of health hazards associated with it. I won't bore you with the details, mostly because I find the details disturbing. Here's the important stuff. It's fermenting. When you have fermentation you have alcohol.

You'll note that the tea is not pasteurized to preserve any apparent health benefit from the bacteria but because of that fact, the alcohol in the beverage continues to be produced. Although the tag lists less than 0.5% alcohol that is not always the case over time. It's been a difficult subject to deal with for liquor control authorities because of this changing alcohol concentration. If it's less than 0.5% at one point is that good enough even if it goes over later?

It's a difficult thing to decide, but I'm willing to cut Lindsay some slack on this one. Maybe anyone who can actually swallow the stuff deserves the alcohol that goes with it.

Friday, March 18, 2011

At Home Forensic Fun

In honor of a beautiful Friday I'm sharing this link of Forensic Fun you can do at home or in the classroom. I have to admit it's pretty creative.

Have a beautiful weekend!

Monday, March 7, 2011

Artificial Sweeteners and Alcohol Absorption

Thank you to Christine Seivers with Radiology Technician Schools.net who reminded me of this topic. Check out their recent article on diet soda here.

I consider myself to be pretty casual with calorie counting, living by the theory of everything in moderation, but even I have to hesitate at times when it comes to calories, especially with Vermont's latest effort of posting the calorie counts on their menus. (Yikes!) So what better way to deal with the extra calories in alcohol then by mixing it with a diet soda?

Well, you may want to wait a minute there. Turn out that combining alcohol with an artificial sweetener increases the speed of gastric emptying and thus the speed of absorption in the blood stream. The faster the absorption, the higher the blood alcohol concentration reached since there is less time for the alcohol to undergo first pass metabolism.

In a study performed by Christopher Raynor et al at the Royal Adelaide Hospital in Australia, observed that drinks containing an artificial sweetener had faster gastric emptying times than those that were regularly sweetened. The speed difference was significant with the diet versions emptying 42% faster resulting in quicker times to peak and higher peak blood alcohol concentrations (BAC).

Not only is it important to note the higher peak alcohol concentration obtained, but also to note that the speed of absorption can affect the level of impairment. This is best described as the Mellanby affect where there is more impairment observed at a given BAC as concentration increases than at the same BAC as it decreases. This is acute tolerance. With concentration rising more rapidly, a higher level of impairment can be observed because there is less time for this acute tolerance to develop.

One way to counter this is to add food while consuming your diet cocktails. The presence of food in the stomach, especially fatty food slows alcohol absorption because it slows gastric emptying resulting in a longer time for absorption and lower blood alcohol peak.

Of course then you've just negated the whole point of drinking the diet cocktail in the first place...