Tag Archives: heuristic

Is anxiety a choice?

Is anxiety a choice?

Is an anxiety disorder a choice?

Can a person choose not to be anxious?

Last night I had an interesting conversation with a stranger in the car park of my local supermarket. We’d exchanged a few pleasantries in the queue for the checkout – like me he refuses to use automated checkouts because, also like me, he’d much prefer that people keep their jobs.

We happened to have parked our cars next to each other on the way in and so the conversation continued in the car park, this time the subject was cars, driving and the rather nasty bump he’d had to the front of his vehicle. That conversation reminded me of today’s topic on anxiety.

Some time ago, one dark winter morning I found myself driving to work down unlit country roads in the rain. Visibility was poor and so I wasn’t going particularly fast which turned out to be a really good idea.

Also on the road on that dark, wet morning was a cyclist. A cyclist who was dressed in dark clothing with no lights and no helmet. To be honest I don’t even know how this guy might possibly have seen where he was going without lights – it really was that dark. However, presumably he could. I couldn’t see him though.

As I approached this invisible cyclist he pulled out into the middle of the road intending to turn right. You can guess what happened next. That’s why it’s such a good job I wasn’t going very fast. If I’d been driving at the legal speed limit instead of to the actual conditions I’d probably have killed him.

Fortunately, amazingly even he was OK apart from a few bruises. The ambulance came and took him to hospital where he was checked over. The police arrived and took my details, including my negative breath/alcohol test and I called in to work to explain that I wouldn’t be in that day. What happened next was revealing, especially about anxiety, phobias, avoidance and the ease with which normal freeze, flight or fight responses can become pathologies if we’re not careful.

My plan had been to return to work the following day. However within an hour or two of getting back to my accommodation I’d started to think. I actually believe that it would have been much easier to deal with the anxiety that followed if the accident had been my fault. If I’d done something wrong I could just decide to correct the flaw in my driving and make sure that nothing like this happened again. But that’s not what happened.

No matter how hard I tried I couldn’t think of any aspect of my driving that morning that I can change for the better. I hadn’t been drinking, I wasn’t going particularly fast, I was awake and alert, I was certainly concentrating due to the poor conditions, my car was in good condition and roadworthy and I was correctly positioned on the road. There was nothing I could think of to do that might prevent something like this happening again and if it does the next one might be fatal. That’s a really scary prospect.

It’s interesting that even though this is the first such accident I’ve had in over 30 years of driving all across UK, all that evidence of safe driving paled into insignificance against this one event. That’s because of a particular mental shortcut, an heuristic we know as the availability heuristic. I mentioned heuristics in an earlier video as part of my evolutionary psychology series. Click the link at the top of the screen for more information.

The availability heuristic is an evolved mental strategy that gives precedence to recent events. In a changing environment it’s useful – it allowed our ancestors to recall and give weight to the location of food, of predators and a whole host of other, changing environmental and behavioural artefacts. In the modern world it’s still extremely valuable but it has its drawbacks. One such drawback is the over-emphasis we give recent events. Here’s how it can turn useful anxiety into pathological disorders.

My emphasis on this single, recent memory caused me to work hard to find a way to avoid similar problems in the future. So far so good – we can all see the benefit of that. Unfortunately, the only thing I could come up with to avoid a repetition of this awful event is to stop driving. That’s rather less positive – especially in the light of the odds, bearing in mind my years, even decades of driving without hitting anyone, cyclist or not. But recent memories are the thing and that’s why I seriously considered not driving, giving up my job because I’d have no way to get to work without my car and I even spent time trying to rework my finances to allow me to retire early, all because I didn’t want to drive.

Now think about this. If I’d actually stopped driving that day what would my most recent driving memory be? Obviously it would be the traumatic memory of hitting, and initially thinking I’d seriously injured or even killed a cyclist. If that’s the result of the availability heuristic, the result of my most recent memory then my anxiety about driving will never dissipate. Not only that, the sense of fear I’d feel when contemplating driving, coupled with the relief I feel when deciding not to constantly reinforces the heuristic every time I think about getting back into the car.

Even though I know all this it took me three more days to pluck up the courage to drive my car again. I chose a quiet, sunny afternoon in broad daylight and drove around quiet country roads and literally had to force myself to turn the key and start the engine. That gave me a new memory but not enough to overcome the power of the traumatic heuristic. Powerful, traumatic memories take a lot of subsequent memories to take away the fear they generate. And the longer we avoid the issue the harder the trauma is to overcome. And that’s the point of this little video.

If you have an anxiety state that doesn’t seem rational, regardless of the emotion you feel, it’s important to ignore the emotion. Do this as soon as you can to build up new memories that can take advantage of the availability heuristic. That’s what people mean when they tell people to get back on the horse. Don’t let anxiety overcome rationality or you might find that your life choices become governed by fear to such an extent that avoidance shrinks your world, your opportunities and your options over time until there’s almost nothing left.

And it all begins when we give in to traumatic memories because of the availability heuristic.

Hard wired 10: Evolution, human culture and the big brain

Evolutionary psychology as we shall see, is tightly bound up with culture. To understand the evolution of culture we need first to explain how we developed our big brain. Without increased brain power it’s unlikely that human culture would ever have developed beyond the level of modern chimpanzees.

Whilst there is good evidence that our species (& its forebears) evolved ever larger brains the question of why they did so is much harder to answer. We do know that it must have resulted from selection pressures and that the process involved pre-existing traits but that’s about all. So far as I can tell there is no definitive evidence to explain the exact process. However there are a number of possibilities.

The following is a ‘just so’ story. It’s not even the only such story that has been proposed. It is, however the one that seems most plausible to me. It’s a speculative explanation for the currently known facts. Those facts undoubtedly will be added to as time goes on. As our understanding increases our explanations will improve. That’s the scientific process. We haven’t reached the end of our journey of discovery. After all, it is only 2019.

What is culture?

In this context ‘culture’ means shared beliefs, rituals, understandings and explanations. That’s not rocket science. It would be hard to imagine any sizeable human group that didn’t have at least some cultural traits. The real question isn’t why humans developed culture but why (and how) our ancestors evolved the ability to do so in the first place. It seems that many changes were necessary to make human culture possible:

Selection pressures and adaptations

  • Habitat changed (our ancestors became increasingly well adapted for life in the open and less well adapted for life among the trees;
  • Brain volume increased significantly;
  • Technology developed and changed (from basic ‘processed’ tools such as flint spear points and arrowheads to axes, jewellery and even boats);
  • Hunting changed (there is evidence of much larger game animals being butchered as the species evolved).

These things must have resulted from selection pressures favouring individuals best suited to cope with change. Collectively they represented significant advantages to those individuals who possessed even some, if not all of the necessary adaptations. The gene pool was changing.

It seems to me (at least at this early stage of my studies) that the most important selection pressures were:

  • Group size;
  • Communication and language needs;
  • Need for larger amounts of food;
  • Need for cooperation to sustain large groups;
  • Need for co-operation to ensure the survival of larger groups;
  • Need to develop shared ‘memes’ to facilitate cooperation;
  • Need to develop explanations to foster group cohesion (and ‘out-group’ alienation).

Many of the ‘mental modules’ we’ll discuss later in the series are refined versions of adaptations resulting from these very pressures.

Existing traits available for natural selection via directional and sexual adaptative pressures seem likely to have included…

Rudimentary communication via mating ‘songs’ & dance

Studies of our closest genetic relatives, chimpanzees and bonobos show a tendency to communicate via a range of sounds and gestures – especially during courtship. Gibbons which pair for life advertise their relationships to others via song and studies have shown that they also have different calls (rudimentary language) representing different kinds of threat.

All these things represent viable precursors of language. Assuming, as seems likely, that similair abilities were present in our early hominim ancestors, we have the raw material for natural selection to work with.

But there’s a problem. For sophisticated language to develop the animal would need a big brain. However to build a big brain the animal needs plentiful protein. Obtaining plentiful protein requires effective, co-operative hunting of big game. Co-operative hunting of big game requires communication which requires a big brain. Which came first, the chicken or the egg? Catch 22!

This was a major quandary for evolutionists for many years. It seemed as though big brain development was impossible and yet it happened. We have the fossils to prove it. What we didn’t have was an explanation. But now we have….

Theory of mind

Cooperation requires ‘Theory of mind’. That means an awareness of self and of others. It also requires an understanding that others may see things differently from ourselves. Without these two insights teamwork (and effective, cooperative big game hunting) would’ve been impossible for humans. And yet for years it was believed that no other primate species exhibited even rudimentary theory of mind. Until…………..…..

Co-operation and empathy

Another set of primate studies revealed not only significant theory of mind but also remarkable co-operation, especially related to aggression, dominant coalition and access to ‘mating rights’. Not only that, studies involving bonobos demonstrate significant empathy – another major requirement for the development of culture as we humans would recognise it. Once again we see the rudiments of another of the elements needed for big brain and cultural development. We can assume that our pre-human ancestors possessed the same rudimentary characteristics before the big brain developed.

So how might these elements come together? The process isn’t quite so complicated as it first appears.

As our ancestors left the forests and ventured out into the grasslands the need for effective warning systems became pressing. Natural selection (predation) favoured the best communicators creating a directional pressure toward more and more sophisticated language.

Improved language facilitates cooperation (largely based upon shared ‘memes’ or ‘explanations of the world’) which in turn facilitates more effective hunting.

More effective hunting meant more protein which allowed better brain development leading to even better communication.

Dependency and parental investment

The mechanics of childbirth provided a new problem for the evolving apes. Bipedalism (walking upright) was necessary for survival out of the woodlands but it meant a narrow birth canal. That means that bipedal hominims need to be born before their brains are fully developed. Otherwise their heads will be too large for the birthing process. This results in extended periods of helplessness for newborns (a characteristic that exists in humans to this day). This creates a serious selection pressure. Only those babies that are well looked after survive.

This explains why, compared with most other primates, human males invest far more of their time, energy and resources in providing for and nurturing their young. Chimpanzee males, our closest relatives typically don’t even know which offspring are theirs. Human males generally do – and they participate. We are a ‘High Male Parental Investment’ (MPI) species.

The extended helplessness of human infants created a significant selection pressure. Empathic and co-operative males provided the best nutrition and protection. Females that selected effective providers and nurturers as mates were most likely to see their young make it to maturity and produce offspring of their own. Their genes will survive.

Consequently males and females are subject to directional and sexual selective pressure favouring empathy, high parental investment and cooperation. This selection pressure (over many generations) imbued our ancestors with the ingredients for social culture and the means to fuel a big brain. The big brain in turn built upon these qualities to facilitate even greater technologies, communication and social interaction. This remarkable combination of selection pressures and adaptations allowed our species to develop, step by step from small bands of hunter gatherers into the large societies with sophisticated cultures that we know today