The Carney Landis Experiment

May28

Suppose you’re making your way through a jungle, and in pulling aside a bush you find yourself before a huge snake, ready to attack you. All of a sudden adrenaline rushes through your body, your eyes open wide, and you instantly begin to sweat as your heartbeat skyrockets: in a word, you feel afraid.
But is your fear triggering all these physical reactions, or is it the other way around?
To make a less disquieting example, let’s say you fall in love at first sight with someone. Are the endorphines to be accounted for your excitation, or is your excitation causing their discharge through your body?
What comes first, physiological change or emotion? Which is the cause and which is the effect?

This dilemma was a main concern in the first studies on emotion (and it still is, in the field of affective neurosciences). Among the first and most influential hypothesis was the James-Lange theory, which maintained the primacy of physiological changes over feelings: the brain detects a modification in the stimuli coming from the nervous system, and it “interprets” them by giving birth to an emotion.

One of the problems with this theory was the impossibility of obtaining clear evidence. The skeptics argued that if every emotion arises mechanically within the body, then there should be a gland or an organ which, when conveniently stimulated, will invariably trigger the same emotion in every person. Today we know a little bit more of how emotions work, in regard to the amygdala and the different areas of cerebral cortex, but at the beginning of the Twentieth Century the objection against the James-Lange theory was basically this — “come on, find me the muscle of sadness!“

In 1924, Carney Landis, a Minnesota University graduate student, set out to understand experimentally whether these physiological changes are the same for everybody. He focused on those modifications that are the most evident and easy to study: the movement of facial muscles when emotion arises. His study was meant to find repetitive patterns in facial expressions.

To understand if all subjects reacted in the same way to emotions, Landis recruited a good number of his fellow graduate students, and began by painting their faces with standard marks, in order to highlight their grimaces and the related movement of facial muscles.
The experiment consisted in subjecting them to different stimuli, while taking pictures of their faces.

At first volunteers were asked to complete some rather harmless tasks: they had to listen to jazz music, smell ammonia, read a passage from the Bible, tell a lie. But the results were quite discouraging, so Landis decided it was time to raise the stakes.

He began to show his subjects pornographic images. Then some medical photos of people with horrendous skin conditions. Then he tried firing a gunshot to capture on film the exact moment of their fright. Still, Landis was having a hard time getting the expressions he wanted, and in all probability he began to feel frustrated. And here his experiment took a dark turn.

He invited his subjects to stick their hand in a bucket, without looking. The bucket was full of live frogs. Click, went his camera.
Landis encouraged them to search around the bottom of the mysterious bucket. Overcoming their revulsion, the unfortunate volunteers had to rummage through the slimy frogs until they found the real surprise: electrical wires, ready to deliver a good shock. Click. Click.
But the worst was yet to come.

The experiment reached its climax when Landis put a live mouse in the subject’s left hand, and a knife in the other. He flatly ordered to decapitate the mouse.
Most of his incredulous and stunned subjects asked Landis if he was joking. He wasn’t, they actually had to cut off the little animal’s head, or he himself would do it in front of their eyes.
At this point, as Landis had hoped, the reactions really became obvious — but unfortunately they also turned out to be more complex than he expected. Confronted with this high-stress situation, some persons started crying, others hysterically laughed; some completely froze, others burst out into swearing.

Two thirds of the paricipants ended up complying with the researcher’s order, and carried out the macabre execution. In any case, the remaining third had to witness the beheading, performed by Landis himself.
As we said, the subjects were mainly other students, but one notable exception was a 13 years-old boy who happened to be at the department as a patient, on the account of psychological issues and high blood pressure. His reaction was documented by Landis’ ruthless snapshots.

Perhaps the most embarassing aspect of the whole story was that the final results for this cruel test — which no ethical board would today authorize — were not even particularly noteworthy.
Landis, in his Studies of Emotional Reactions, II., General Behavior and Facial Expression (published on the Journal of Comparative Psychology, 4 [5], 447-509) came to these conclusions:

1) there is no typical facial expression accompanying any emotion aroused in the experiment;
2) emotions are not characterized by a typical expression or recurring pattern of muscular behavior;
3) smiling was the most common reaction, even during unpleasant experiences;
4) asymmetrical bodily reactions almost never occurred;
5) men were more expressive than women.

Hardly anything that could justify a mouse massacre, and the trauma inflicted upon the paritcipants.

After obtaining his degree, Carney Landis devoted himself to sexual psychopatology. He went on to have a brillant carreer at the New York State Psychiatric Institute. And he never harmed a rodent again, despite the fact that he is now mostly remembered for this ill-considered juvenile experiment rather than for his subsequent fourty years of honorable research.

There is, however, one last detail worth mentioning.
Alex Boese in his Elephants On Acid, underlines how the most interesting figure of all this bizarre experiment went unnoticed: the fact that two thirds of the subjects, although protesting and suffering, obeyed the terrible order.
And this percentage is in fact similar to the one recorded during the infamous Milgram experiment, in which a scientist commanded the subjects to inflict an electric shock to a third individual (in reality, an actor who pretended to receive the painful discharge). In that case as well, despite the ethical conflict, the simple fact that the order came from an authority figure was enough to push the subjects into carrying out an action they perceived as aberrant.

The Milgram experiment took place in 1961, almost forty years after the Landis experiment. “It is often this way with experiments — says Boese — A scientis sets out to prove one thing, but stumbles upon something completely different, something far more intriguing. For this reason, good researchers know they should always pay close attention to strange events that occur during their experiments. A great discovery might be lurking right beneath their eyes – or beneath te blade of their knife.“

On facial expressions related to emotions, see also my former post on Guillaume Duchenne (sorry, Italian language only).

La famiglia cannone

May16

Sorry, this article is available in Italian language only.

Mirages

May5

All that we see or seem
Is but a dream within a dream.
(E.A. Poe)

∼ Inferior Mirages ∼

Very hot air close to the ground, colder air above. Light rays refracted from distant objects get deviated by the column of scorching air moving upwards. Here is the classical mirage of Sahara Bedouins, fresh oasis among the dunes and water poodles where there is nothing but dusty desert.

A mirage which is bound to also haunt another kind of nomad, the soul who cannot help but travel because he’s a victim of the highway blues, and he knows all too well that the tarmac road might look wet under the torrid sun.

The more we get close to it, the more the illusion vanishes. We hurry towards the much coveted water to find it was mere deceit; and all our hurrying did was worsen our thirst. “If a mirage were water, why is water not seen by those nearby? – Nāgārjuna asked – The way this world is seen as real by those afar is not so seen by those nearby for whom it is signless like a mirage“. Maybe we too will be soon close enough to the truth to realize it is an illusion.

∼ Superior Mirages∼

The ocean liner, in the dark night brightened only by the stars, eased out majestically on the water. Aboard, feasting passengers: on the horizon, a strange mist. Reginald Lee was on watch:

A clear, starry night overhead, but at the time of the accident there was a haze right ahead, […] in fact it was extending more or less round the horizon. There was no moon.

A dark mist, a vague tremor just above the horizon, but too far away to seem like a menacing sign. Then, from the nothingness of that fog, without warning, like a giant bursting on the scene from a funeral curtain, came the huge milky silhouette.

It was a dark mass that came through that haze and there was no white appearing until it was just close alongside the ship.

It looks like it might have gone that way: the Titanic probably sank due to a mirage. The mountain of ice remained hidden until the very last moment inside the sidereal light, which had been bended by the cold of the sea.

Ironically, this was the same kind of mirage which gave another ship, albeit fantastic, an eternal and persistant place in sailors’ fantasies. The immortal Flying Dutchman, floating over the ocean waves, perhaps owes his legend to the illusion called “superior mirage”. Superior, because its phantasmagoria appears above the horizon, and sometimes ships sailing beyond the Earth’s curve, which we shouldn’t be able to see, look like they are suspended in mid air.

Like mountaineers, who fear and respect the mountain, the people of the sea knew a secret which escaped the mainland inhabitants. They were aware of the insidious nature of water, they knew all about whirlpools always ready to gape unexpectedly, about the visions, the magical fires up on the mast, the terrible twin monsters waiting for ships to pass in the narrow strip between Sicily and Calabria.

∼ Fata Morgana ∼

It is right on the Straits of Messina that the Castle in the Sky is sometimes spotted, home to the Enchantress, cruel sister of Arthur son of Pendragon. The witch’s magical arts make the winged castle visible both from the coast of the island and from the opposite shore. Many believed they could conquer its trembling stronghold, and drowned.

Thus Morgan le Fay, “Fata Morgana”, gave her name to the rarest among superior mirages, capable of blending together three or more layers of inverted and distorted objects, in a constantly changing visual blur. The ultimate mirage, where nothing is what it seems; impossible apparitions of distant gloomy towers, enchanted cities, ghost forests. The horizon is not a promise anymore, but a mocking imposture.

∼ The Mirage of Everything ∼

Once upon a time, I, Chuang Chou, dreamt I was a butterfly, fluttering hither and thither, to all intents and purposes a butterfly. I was conscious only of my happiness as a butterfly, unaware that I was Chou. Soon I awaked, and there I was, veritably myself again. Now I do not know whether I was then a man dreaming I was a butterfly, or whether I am now a butterfly, dreaming I am a man.

What Zhuangzi is not considering is the possibility that both him and the butterfly might be a dream: someone else’s dream.
Quantum physicists, who are the modern poets, mystics, artists, suggest ours could potentially be a holographic cosmos. According to some scientists, the whole universe might be a simulacrum, a sophisticated simulation (atoms-pixels), us being the characters who little by little are realizing they’re part of a game. Galileo’s method is now teaming up with the opium eaters’ lucid hallucinations, and math itself seems to tell us that “life is but a dream“.

Among the supporters of the hypothesis of the universe being an elaborate fiction inside an alien algorythm, there is a controversial, visionary innovator who is trying to keep us safe from the dangers of strong AI. His inconceivable plan: to fuse our cerebral cortexes with the Net, forever freeing us from the language virus and, in time, reprogramming our already obsolete bodies from the inside. Mutate or die!
And this mutation is going to happen, rest assured, not in two hundred years, but in the next ten or fifteen.

Today we take a look around, and all we see is mirage.
For thousands of years philosophers have been discussing the Great Dream, but never before the veil of Maya has been so thin, so close to be torn at any moment.
What does it mean for us to accept the possible unreality of everything? Does it entail an absolute relativism, does it mean that killing is nothing serious after all, that nothing has value? Weren’t Hassan-i Sabbāh‘s last words “nothing is true, everything is permitted”?
[Old Uncle Bill smiles slyly from his parallel universe, surrounded by seductive centipede-boys.]
Are we instead to understand mirage as a liberation? Because death will finally turn out to be that “passage” every enlightened guru told us about, and this is not the true world? But does a true world really exist? Or is it just another mirage within a mirage?

Zhuangzi, the butterfly man, again:

All the while, the stupid believe they are awake, busily and brightly assuming they understand things, calling this man ruler, that one herdsman — how dense! Confucius and you are both dreaming! It is a dream even for me to say that you are dreaming.