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Showing posts with label neal miller. Show all posts
Showing posts with label neal miller. Show all posts

Wednesday, July 30, 2008

The Tyranny of Swamps

IN 442BC, the Greek philosopher Apollodorus of Schwartz (of the Kosher Greek states) was vacationing with his family in the marshland near Athens. He noticed that his family quickly expired from some strange disease. Astutely, he conjectured that the marsh (or probably the consumption of some three day old tomatoes) was somehow responsible. Later observations of vacationers and mortality rates increasingly confirmed the fact that being around a marsh for a picnic, or worse, living there was a bad thing. Thus the concept of 'the tyranny of swamps' was born. Of course, what caused swamp fever wasn't too important, as one could chalk it up to swamp gas, stinky water, or evil spirits. Whatever the cause, swamps were bad.



Ancient Greek Psychologist


Nonetheless, the fact that swamps are bad could not dissuade folks from living or vacationing near them, and more than two thousand years had to pass before someone actually took the time to scientifically explain why swamps were associated with disease. Actually, the swamp was not at fault, but rather an aspect of swamps, namely a disease carrying mosquito. Thus instead of draining or otherwise avoiding the swamp, you simply get rid of the mosquito. So you can have your swamp vacation and your health too!

Fast forward to the present time, and we are confronted with tyranny of a different sort, namely that of choice. In his recent book 'The Tyranny of Choice' the psychologist Barry Schwartz deftly summarized a score of studies that arrived at the same conclusion: namely having lots and lots of choices is bad for you. Specifically, the more choices you have, the more you stand to lose if you choose the wrong item, whether it be condiments, cars, or condoms. Thus you get anxious, indecisive, and more likely than not end up running away from the whole situation.

A problem with this analysis is that like Schwartz's ancient kin Appllodorus, noting that people get sick because the context of their behavior doesn't explain that behavior. Indeed, all that Schwartz and his colleagues could offer was that making lots of choices taxes our nervous system like an overloaded circuit box, thus substituting metaphor for explanation. But that didn't matter, since like a noxious swamp, all you had to do to escape all that anxiety was to simply avoid making too many choices. So explanation can wait, and no problem if a thousand years would need to pass. Actually, to find an explanation you need to go back 50 years or so, or a thousand and fifty if you waited that long.



Dollard and Miller to the rescue!


In 1955, John Dollard and Neal Miller studied laboratory animals under similar conditions of choice, and came to the conclusion that the critters will tense up when confronting future choices that could result in pain, but would only be anxious if they could possibly avoid those choices. In other words, tension and anxiety occurred to warn you of future pain, and were reinforced because they provided the motivation or 'drive' for you to avoid the situation. Anxiety did not occur because our brain is proverbially overheating due to all those demanding choices, but because it anxiety does something, namely motivates you to avoid future pain.

Now the anticipation of choice is not a painful thing, it's only when you have to make a choice. The problem is in these days, choice is a infinitely portable thing, and we are faced with having to make choices every minute. Unlike the 1950's, when the times we could make choices were more limited, nowadays, we are offered the choice of chatting on the phone/watching tv/internet shopping etc. 24/7. Thus the world becomes infinitely distractive and anxiety inducing when every second we stand to lose something. So its not necessarily the choices, but the timing wherein we make choices. So the cure is remedying an aspect of the problem, namely the portability of choosing. Just radically postpone all your distractions to a set time and place, and voila, you are liberated from the tyranny of choice. So you can indeed have your cake (or dessert choices) and eat it to, just remember that its only after dinner.


Thursday, June 21, 2007

Antonio Damasio reinvents the wheel

As the adage goes, there is nothing new under the sun, but if you change your labels a bit, and add mysterious (yet irrelevant) ingredients, you can sell tap water in a bottle. Which come to think of it, has already been done.

So it is no great revelation you can a fool lot of the people all of the time, and that I assert includes academic psychologists who should know better, given of course a standard knowledge of their discipline, which generally escapes them.

Consider this example:

In 1935, the psychologist and learning theorist Neal Miller conducted the following experiment.

To human subjects he presented in unpredictable order the symbols T (followed by electric shock) and 4 (not followed by shock). The shock was followed by a large galvanic response (GSR) that was soon conditioned not only by seeing the symbol T, but by anticipating it. From this and subsequent experiments Miller concluded that organisms should "behave 'foresightfully' because fear (i.e. anxiety), would be mediated by cues from a distinctive anticipatory goal response." Miller further concluded that the 'learned drive' of fear or anxiety, as marked by the GSR, obeys the same laws as do overt responses.

In other words, if you suspect that in the future you will engage in something painful, like having a tooth pulled or finding your final grade in a course, you will get a bit anxious about it, which will cause you to attempt to avoid the inevitable, and if successful will reward or reinforce the anxiety. Common sense I'd say.


Now compare this experiment with Antonio Damasio’s IGT (Iowa Gaming Task) experiment performed in the early 90's, where an individual again is confronted with a succession of symbols (in this case, markings on a card), and with unpredictable aversive consequences, in this case large negative card values occurring from time to time. If you ever played poker, that was the essence of the experiment. The experiment measured the SCR, a dependent variable equivalent to the GSR. If it is assumed that unexpected 'bad information' is painful as well, then both experiments assume equivalence. In other words, get a bad card, and you feel a bit anxious about it. Damasio concluded that anxiety or arousal helped you make better choices than merely avoiding a bad one, and to demonstrate it charted out a neural mechanics for the whole thing that would have done Rube Goldberg proud.


How the Neural Self Operates a Napkin: As interpreted by Rube Goldberg


In spite of his confidence, psychologists who have replicated the IGT experiment have found no evidence that anxiety makes you think better, but they have forgotten Neal Miller's experiment, and the work that followed that would have forewarned them of Damasio's hooey of a hypothesis.

So Damasio is wrong, and he ain't original either. But by affixing a simple experiment with a list of irrelevant neural ingredients, he succeeded metaphorically in bottling tap water, which given Damasio's resulting rise in stature, has proven to be a very profitable thing indeed.






A few side notes on the Miller and Damasio experiments:



The difference between both experiments is not in their structure, which are more or less equivalent, but rather in the interpretation of the role of the galvanic skin response as a dependent measure. Specifically, the GSR for the Miller experiment correlated with a subjective response that was interpreted as anxiety or fear. For Damasio, the subjective response to arousal as marked by the SCR was subtler, or a mildly or non aversive ‘gut feeling’. In other words, if one assumes that the level of arousal was higher for Miller’s subjects than Damasio’s, the level of arousal could lead to distinctly different interpretations as to the role of arousal. Thus, it is easy to see how Miller assumed that tension based arousal (or anxiety) mediated avoidance, and why Damasio assumed that arousal mediated choice. In other words, if turning a bad card in the IGT experiment signified not a loss of play money but a loss of real money or a painful shock, then avoidance and not choice would have been a more likely interpretation.


So we are left with the original question: what is the role of autonomic arousal? If arousal is dependent upon learning, as both Miller and Damasio hold, what is its function: avoidance, choice, or some mixture of the two that is dependent upon the level of arousal?


One way to ascertain the role of avoidance is to simply examine whether elevated autonomic arousal occurs under response contingencies that either eliminate the ability to avoid or obviate the need to avoid. If results under a response contingency are all bad and unavoidable, then we have Seligman’s learned helplessness, and if all results are good and thus create no need to avoid, then we have Csikszentmihalyi’s ‘flow’ response. Both are marked by low autonomic arousal as marked by a reduction in SCR and a corresponding lack of reported tension, anxiety, or fear. Thus it may be construed that avoidance is an essential function of autonomic arousal. This of course does not directly challenge Damasio’s position, but raises the avoidance hypothesis front and center as an alternative explanation for his findings.


For more on the somatic marker, see my new ebook:



Source:

Miller, N. E. (1971) Selected Papers, Atherton, Chicago
pp-123-171