Tannin
Storage? I am Storage!
sechs (in another thread) said:Studies have shown that about 100% of people who talk on cell phones while driving are distracted. Distracted drivers make mistakes and do things that are, at best, inconsiderate.
If you think that you can talk on your cell phone while driving with no degradation in your performance, either you're a poor driver in the first place or deluded.
This is a classic example of the hard-shouted half-truth that people all too often substitute for genuine science and actual knowledge. (Not that you were shouting, I hasten to add, Sechs - you just happeed to spout an ideal example of the sort of nonsense that most people seem, these days, to be unable to distinguish from truth.)
So what is it about talking on a mobile phone that "degrades performance"?
Reduction of attention to the primary task at hand, one assumes. (For, as Sechs points out, driving a potentially lethal missile surely does count as the primary task, no matter what else one happens to be doing at the time.)
Seems simple enough, doesn't it. The more attention one has to spare for the primary task, the better one is able to perform it. Or so one assumes.
This, in a word, is unscientific crap. Or, more accurately, it is a half truth. It is true if and only if the primary task is capable of (a) being performed more effectively than one can perform it with partial attention, and (b) is capable of absorbing one's entire attention for more than a few moments.
Let's look at those (a) and (b) parts more carefully:
Some tasks require every single quantum of attention and concentration that one can muster. Flying a fighter aircraft in combat is one. Batting at cricket is another. In fact, every sport has its moments when, to do well, one must concentrate 100%. Oh, and there are moments when driving fits into this category also: entering a multi-lane roundabout is a good example; dealing with multiple lane changes while slow traffic enters a fast-moving freeway is another; any full-on emergency moment, such as having to brake hard and avoid a kangaroo on an outback road is a third.
Notice, however, that these "100% concentration required" tasks are relatively short. When batting, for example, one concentrates at 100% for only a few moments while the ball is being bowled and struck, the rest of the time one does one's best to relax, to prepare mind and body for the next 100% moment. It's the same in other sports (if often not to quite so predictable a pattern as the succession of six fast balls an over).
Even that extraordinarily brutal and disgusting "sport" known as boxing follows the same general pattern: periods of fierce concentration followed by periods of rest. (They ring a bell so that the average boxing fan, who is probably not too bright, can tell which is which.) But jokes aside, this is done for a reason. It's not for the competitors - let's face it, why on earth would anyone make up rules to protect the competitors in a "sport" the entire object of which is to batter one or both human beings into a senseless pulp? No, it's for the convenience of the spectators: people simply can't concentrate for long enough to "enjoy" (if that's the right word) the action if it goes on for too long at a time.
In a nutshell, it is near-impossible for the average person to concentrate on any one single thing for more than a short period of time. That is why everything we do is punctuated with breaks. (That is why, for example, I'm breaking this long post up into paragraphs - because none of you could concentrate for long enough to read it if it was all in one great slab of text, nor would it be easy to write.)
So what do we do in-between "concentration moments"? Rest?
Not really. We remain active - always mentally active, quite often physically active too - ever watched a boxer skipping up and down between rounds? - but we do something different. We allow our minds to wander a bit, so that when the next "concentration moment" arrives we will be ready for it.
Most tasks, of course, do not require full concentration. They can be performed every bit as effectively without full and conscious attention. In some cases, more effectively.
Stop! Notice how you are breathing. Observe the in and out rhythms of your breath. Do this for 30 to 60 seconds. Think hard about it. Control every action. Concentrate!
There. Did you breathe any better? Are your lungs in better shape now than they were a minute ago? Do you think you could thing about breathing and nothing else for five minutes? Thirty minutes? Eight hours straight?
Every try making love by concentrating hard on what you are doing, the same way you concentrate on driving off the 7th tee? (But hopefully for somewhat longer.) I think you get my drift.
This leads me to ponder attention spans and - finally - to return to driving. The vast majority of driving does not require great coordination or instant reactions, but it does require unbroken attention. And yet the great majority of driving does not provide sufficient mental stimulation to retain one's attention! This is the great trap of the road: you have to stay alert, but nothing much is going on most of the time - and as we just discovered with our little breathing experiment, it's not possible for ordinary humans to concentrate completely on anything that does not provide sufficient stimulation for any length of time.
Here, at last, we get to the nub of the matter: important enough to put in bold type:
For any given activity, there is a stimulus level at which the human is most effective.
More than that level, and you foul up. (You are having an argument with your kids in the back seat, trying to urgently dial an out of state number on your mobile phone, switching the windscreen wipers up to full speed because the rain is getting worse, hoping you won't be late for work, and going through a busy intersection with a Kenworth 18 wheeler up your backside. You can't process all that information in the time available, and you inevitably fuck up - hopefully by dialing a wrong number, not by investigating the underside of the Kenworth.)
Less than that level and you foul up. Look, this ain't rocket science. You can do it with lab rats, never mind people. Give a lab rat a task that requires a moderate amount of concentration. Reward with food, punish with shocks as appropriate. The rat will do very well. Make the task a lot harder: there is too much information to process, the rat stresses out and starts making mistakes. (Just like a human in heavy traffic.) Make the task a lot easier, and whgat happens? Yup, the rat fucks up. Psychology 101. Read the literature.
The application of this basic rule of animal behaviour to road safety should be obvious. Road engineers have known about it for many decades. (Why do you think they put curves in freeways every so often? Sometimes it's to avoid a hill or cross a river, but mostly it's a conscious road safety design decision. Too long a straight stretch and people zone out, with fatal results.)
Where the amount of stimulation is too little, it is vitally important to add extra stimulation (any kind) in order to get the human in charge of the vehicle up into the "safety zone" where they can drive effectively. There are lots of ways to do this, not just road engineering. Most of them are supplied by the driver himself. (Turn on the radio, light a cigarette, chew some gum, whatever.)
Naturally, where there is too much stimulation (more traffic, lots of lights, tricky lane markings) you need to reduce the flow of information and decision-making, so as to get the human back into the effective zone. The easy way is to slap on a speed limit. (Good drivers, of course, and even quite a lot of bad drivers, have enough sense to do this for themselves.)
Ever notice how so many people want to speed a bit? Why do we all like to do this? One reason is that if we travel, on average, 5 mph faster than the traffic around us, we get more variety. Instead of following the same green Ford the whole damn way, things happen. Sibconsciously, we feel better, and in general we make better driving decisions because we are "in the zone".
The trouble comes, of course, when everybody tries to drive 5 mph faster than everybody else. This soon escalates into freeway madness, and it's terrifying: everybody is outside their comfort zone, and everybody is making bad decisions. You probably meet lots of this in the US. I rarely see it these days, since I left the city 20 years ago, but sometimes see it happen on long weekends or just before Christmas. Nasty!
Anyway, the point is that incresing the complexity of a driver's workload (e.g., by having him talk on the telephone) is not always a bad thing. Indeed, under certain circumstances (such as long, empty roads with little else to do for hours at a time bar drive much too fast or zone out with boredom and cruise on sideways into the scenery) a mobile phone conversation will be a considerable aid to concentration, and thus safety.
It all depends on the circumstances.