Agent Plus Environment

Meandering along a street in Georgetown recently, I looked out at the throngs of people, walking in pairs and groups and singly, ethnicities as varied as their unseen motivations in walking out that day. I saw them, and felt apart; not disconnected or of some different species, an outsider looking in, but in the way of feeling that I was more self-aware at that moment. A single cell in a much larger organism, looking out and seeing the workings of all other cells. It was a knowing that I could see us all, self-organizing sacks of meat composed of so many tiny molecules, marvelously complicated and simple at the same time.

Hierarchies of behavior, heuristics for selecting actions, emotions and motivations influencing them all. Somehow self-aware, conscious of being, conscious of our consciousness. And I, in that moment, more conscious than the rest, looking at the curve of the road, the brick buildings squeezed up beside white-painted shops and little restaurants, the cars and trucks speeding by, and the people, all blissfully ignorant of everything at my level of awareness.

It was a feeling of awe. If I were a religious being, perhaps I would say I felt the hand of a god, touching me then, showing me the vast oneness of the universe. But I am not, and so I interpreted the feeling otherwise: not a part of any great unity, no; merely one agent existing in a world and conscious of that existence. Marveling at that existence — that any clump of matter could build a society, could conquer the land and sea and air, could walk briskly down a cement sidewalk thinking or not thinking of the weird complexities of the animal brain that made any of these accomplishments possible. That we could organize ourselves such that societies are possible, and so are streets, and restaurants, and cars.

Sometimes it strikes me like that: The realization that all we are, all we ever are, are clumps of molecules bumping around. We have motivations, emotions; we have what feels like intentionality and we speak to each other, creating stories and lies and truths. But we are not special. We have no meaning. The most marvelous thing of all is that we have no more meaning than the simple biologically-inspired, behavior-based robots I created for my thesis. Agents, existing in and interacting with a world. Fascinating, brilliant agents.

Moments like these, wondering at how any of us can exist and marveling at how we do and are conscious of it, I know I picked the right thing to study. That I can be here, writing about the meanings we create and believe, is stupefying and wonderful.

One identity?

I ran across the following quote from Mark Zuckerberg the other day — not for the first time — but this time my initial response, instead of being some disgruntled mumbling about Facebook’s privacy settings, was how Western.

“You have one identity. The days of you having a different image for your work friends or co-workers and for the other people you know are probably coming to an end pretty quickly… Having two identities for yourself is an example of a lack of integrity.” –Mark Zuckerberg

Why Western?

Geography, ecology, philosophy

Last semester, I read a book called The Geography of Thought: How Asians and Westerners Think Differently…and Why by Richard Nisbett. As you may infer from the book’s title, Nisbett talks about all kinds of differences in Western versus East Asian cultures and why those differences exist — and I mean all kinds. It’s a broad book. I’m going to give you the flavor:

Nisbett starts by outlining differences in philosophy. Greek philosophy took as a fundamental principle that matter divides into discrete objects. The Greeks drew a line between the internal and external, essentially inventing nature. Perhaps this was a result of their culture of debate, which relies on the notion that two minds can have different representations of the world and that the world has its own nature independent from both minds. Western cultures grew out of Greek philosophy. Since boundaries between any object and its surroundings were built in, people were discrete. Westerners emphasize individualism. The focus on objects and individuals may have led to many of dualisms we have encountered this semester.

Ancient Chinese philosophy, on the other hand, bespoke a constantly changing world, full of contradictions and moving in endless cycles. Harmony and holism were emphasized: there was a mutual influence of everything on everything else. Chinese has no abstractness, either; no “whiteness” without a thing that is white – the white of a swam, the white of the snow. People defined themselves in relation to others, interdependent rather than independent; the goal was The Way rather than truth or knowledge.

Some of these differences may have arisen in part from the ecology in which the cultures developed. Greece was a maritime location where people of many customs and beliefs were encountered, a city-state where rational argument was king, and curiosity and knowledge were valued for their own sake. Occupations favored the autonomous individual – herding, hunting, trading, fishing. Intellectual rebels could move cities to retain the ability for free inquiry, and the clashing of so many customs may have led to the development of formal logic to help deal with the frequent contradiction of opinion. In contrast, the Chinese population by and large belongs to the same ethnic group. Rarely were people with different beliefs and customs encountered, and because many people were farmers who depended on joint irrigation, agreed-upon norms and harmony with one’s neighbors were the goal. From Nisbett’s discussion, one might infer that it is the ecology that led to the development of these features of culture in the first place.

Assumptions about individualism – and language’s role

Nisbett also talks about assumptions. Westerners, he says, consider people to be individuals, assuming that everyone is in control of his/her own behavior, oriented toward goals, striving to be different from everyone else, and preferring justice to be blind. This is Zuckerberg’s assumption, in his above quote.

But not everyone thinks that way. Nisbett notes that East Asians tend to be more concerned with coordinated action and group goals, fitting in, and negotiating a “middle way” that will satisfy particular disagreeing parties. In Confucian philosophies, man cannot exist alone. This has interesting implications for how people understand themselves and how a self-concept is developed! East Asians tend to think that people are defined by their relationships to other people. This is reflected in their languages: Chinese has no word for “individualism” and Japanese has many “I” words, using different words to refer to the self in relation to parents, friends, or professors. East Asians, when describing themselves, refer to their social roles and find it difficult to not specify situations and contexts. Westerners explain personality traits, role categories, and activities – none of which are solely dependent on context.

What I wondered, while reading, was this: How does cultural emphasis on individualism versus collectivism change a person’s concept of self? Fivush & Nelson (PDF) (2004) suggested that autobiographical memory and a concept of self are partially developed through an awareness of self versus other. Wang & Ross (2007) proposed that language is very important to autobiographical memory, and Ratcliffe (2007) suggested that a person might learn to distinguish the self as an individual through interactions with others – but Ratcliffe is a Westerner! Do Westerners build up a concept of self in a different way than East Asians? Does the fact that people who speak certain East Asian languages have few if any explicit ways to refer to individualism or to an “I” without reference to other people influence them to conceive of themselves in a more relational, collectivist way? This points to a deeper question: How much do people’s languages impact their thoughts, conceptions, beliefs, and perceptions? Nisbett presented examples of how language might change how we think about the world around us. E.g., Westerners tend to learn nouns faster – nouns are objects, inert, and tend to be emphasized more in parent-child conversations. Verbs, which are reactive and about relationships, are more salient in East Asian languages. The properties of the language and how the language is used help drive the object versus relation and individual versus collective dichotomies we see across cultures. Again, I see the same paradoxical question: which came first, the language, or the concepts? How and why did these language differences originally evolve?

An interesting question here, with regards to the role of language priming for certain ways of thought, and differences in memory and recall, is this: Do people focus on things (such as objects, situations, and contexts) because they regard them as causally important, or do they regard them as casually important because they focus on them? Regardless of which statement is more true – and perhaps neither is – this statement highlights the role of interpretation. Nisbett discussed a study in which American students were primed to think either interdependently or independently. Students primed for independence rated individualist values as higher and collectivist values as lower; if primed for interdependence, the opposite was true. In an unprimed condition, American students rated individualist values higher while Hong Kong students rated collectivist values higher – but if primed for either case, all the students showed the aforementioned trend. This is interesting because Westerners, in their everyday lives, are constantly being primed as individuals, while East Asians are being primed with interdependence cues. Nisbett offers anecdotes of people who switched locations in the world and subsequently started behaving more independently or interdependently. Context matters!

Harmony vs agency

Nisbett also explains the ideas of erabi and awase. Erabi is active, agentic: the idea that people can freely manipulate their environments to suit their own purposes. Awase is harmonious, fitting in: the idea that people adjust themselves to their environments rather than trying to change them. The Western versus East Asian dichotomy is clear here. Are Westerners resistant to context-based models of the world, to theories such as Pentland’s (2007) that language may not do as much as we think, and to the general idea that individuals are subject to external forces and influences because of their erabi style? Perhaps this is also why the illusion of conscious will is so appealing – do Westerners have more of an obsession with free will than do East Asians? Nisbett notes later than East Asians report feeling less in control of their lives than do Westerners, but that they have less of an issue with this – instead of trying to control situations, they try to adjust them. East Asians also tend to be less susceptible to illusions of control than Westerners.

I am reminded of a quote from Nikos Kazantzakis: “Since we cannot change reality, let us change the eyes that see reality.” It puts me in mind of expectations. Peoples’ experiences set up their expectations about significance and meaning of future experiences – their culture influences what experiences they have. The same events don’t mean the same thing to everyone. In the context of this person’s experiences so far, different events may have been encountered more frequently, different behaviors may have been encouraged or discouraged, and different values emphasized. Nisbett (2003) discusses several studies that suggested East Asians are not as surprised by unexpected outcomes as are Westerners. This could be because they are more accepting of change to begin with – their world view anticipates that no situation will stay constant. Westerners, on the other hand, presume linearity of trends – the fact that they predict a trend to continue in its same direction could lead to their greater surprise when that prediction turns out to be false.

In sum: Agent, environment

In summary: Culture constantly surrounds us. It shapes how the people we interact with react to and interpret their environments, which in turn shape how they interact with us and what they emphasize in those interactions. It shapes and is shaped by language; language shapes and is shaped by our expectations and experiences. We have to keep in mind, however, that cultural differences are averages. Nisbett is careful to note this. Any individual person may not conform to the cultural norms. Although culture is a remarkably important context for a human, the development of a person in a culture is not quite so set as a cell being cultured in a petri dish. It is still the dynamic interactions between genes and an environment that develop a phenotype — an agent plus an environment. The environment, for a person, includes that person’s culture. A person’s past experiences with aspects of their culture – e.g., parent speaking styles, emphasis on objects versus relations, language – will influence that person’s present behavior. Oyama (2000a, 2000b) said we cannot attribute development solely to genes. Neither can development be attributed solely to culture, nor to the wider environment. It is through the interaction of all these contexts that we get functioning organisms.

References
Fivush, R. & Nelson, K. (2004) Culture and Language in the Emergence of Autobiographical Memory. Psychological Science, 15 (9), 573 – 577. [PDF]

Nisbett, R. (2003). The Geography of Thought. New York, NY: Free Press.

Oyama, S. (2000a). Evolution’s Eye: A Systems View of the Biology-Culture Divide. Durham, NC: Duke University Press.

Oyama, S. (2000b). The Ontogeny of Information: Developmental Systems and Evolution. Durham, NC: Duke University Press.

Pentland, A. (2007). On the collective nature of human intelligence. Adaptive Behavior, 15 (2), 189-198. [PDF]

Ratcliffe, M. (2007). Rethinking Commonsense Psychology. New York, NY: Palgrave MacMillian.

Wang. Q., & Ross, M. (2007). Culture and Memory. In S. Kitayama & D. Cohen, (Eds.), Handbook of Cultural Psychology (pp. 645-667). New York, NY: The Guilford Press.

Rock on

Are you familiar with perceptual control theory? If you aren’t, the basic idea is this: People are not rocks. As Philip Runkel puts it,

“Living creatures behave very differently from lifeless things. Unlike a rock, a human does not just sit until something bumps it.”
– Philip Runkel, “Casting Nets and Testing Specimens,” pg 75

The idea is, organisms and agents and people get a bunch of different sensory inputs. They have some internal standards for what they want that set of sensory inputs to be like — some desired state of the world. The difference between how they want the world to be and what the world is actually like drives what they do — what we see as behavior.

The reason this is appealing to me? Perceptual control theory (PCT) says we’re not just input-output machines. Behavior is goal-directed and purposeful.

It’s a useful theory if you want to figure out why people are doing what they do and how to avoid or mediate conflict. Everyone has internal standards that they’re trying to control. As Runkel says,

“[M]ost of us very often act as if we expect other people to behave like rocks. And when we act toward other people as if they were rocks or blankets or typewriters or teacups, we make unending trouble for ourselves. It is true that people do have some features in common with rocks and typewriters. There are, however, important differences between living and nonliving things that most of us overlook time and time again, and to our sorrow.”
– Philip Runkel, “People as Living Things; The Psychology of Perceptual Control,” pg 14

If you want to learn more, I’ve found you a nice list of articles, an informative Less Wrong post a friend linked me to, a comprehensive website, and Google.

And yes, talking about PCT really just was my excuse to share those lovely quotes from Runkel.

Genes: predictor of academic ability?

I found an article today about British researchers who are analyzing the DNA of 4000+ schoolchildren with the goal of finding a relation between the kids’ genes and their academic abilities.

The reason I bring this up is not because the researchers found a gene to explain why you failed your math test, but because the article falls heavily into the “nature vs. nurture” trap. For those of you unfamiliar, nature vs. nurture is the debate over the relative importance of innate qualities built-in from the chromosomes (“nature”), versus personal experiences, environment, and upbringing (“nurture”) in determining individual physical and behavioral differences. Really, it shouldn’t be a debate: organisms’ traits are a result of the interaction of what they start with and where they grow up: nature and nurture. The context in which any organism develops is remarkably important in determining which genes are expressed and how they interact to produce behavior.

Back to the article. There’s one paragraph in particular that gets me:

“Research into height, for example, has picked out 300 genes that affect how tall people will grow, but even these genes can only explain 15% of the total variations in human height. It implies that hundreds more genes must also play a part.”

No, that’s a false choice. What’s implied is that there could be other genes involved, but – and here’s a novel thought – maybe the environment (e.g., nutrition) plays a role? A little bitsy part? Maybe?

A little googling:

In hopes that it was just the reporters who were being deterministic, not the researchers themselves, I set out to find more information.

Robert Plomin of King’s College, London, is the behavioral geneticist cited in the article. He’s currently performing a huge study of British twins. I’ve found several articles stating that he’s a “pioneer in bringing nature and nurture together,” and instead of calling it a “nature vs. nurture” debate, he’s said to have call it (much more appropriately) “nature and nurture.” That’s reassuring. I’d have to read a few of his papers to be certain, but my interim conclusion is that it’s just the reporters.

If you’re interested, I also recently came across a popular article on the gender myth and genetic differences in men and women. It happens to cite Robert Plomin, too.

Billions and trillions

Step by slow, supercomputed step, we approach singularity.

This step: Two massively parallel cortical simulations, run at the Lawrence Livermore National Labs by Rajagopal Ananthanarayanan, Steven Esser, and Dharmendra Modha of the IBM Almaden Research Center, and Horst Simon of the aforementioned labs–these are the guys who previously simulated at the scale of mouse and rat cortices. They used a Blue Gene supercomputer (with a whopping 456 CPUs and 144 TB of main memory–just wait, ten years from now I’ll look back on this sentence and laugh at how little computing power and memory that is). The first, and larger, simulation included 1.6 billion neurons and 8.87 trillion synapses. Human brains still dwarf these numbers: roughly 20 billion neurons and 200 trillion synapses. But it’s a cat-sized step with the complexity and scale of a feline brain.

The first simulation used experimentally-measured gray matter thalamocortical connectivity from a cat’s visual cortex–the simulations neurons were connected in a biologically plausible fashion. Phenomenological spiking neurons, individual learning synapses, axonal delays, and dynamic synaptic channels were all included in the software. The second simulation, with 900 million neurons and 9 trillion synapses, had probabilistic connectivity.

Speed-wise, the researchers report that their simulation runs 2-3 orders of magnitude slower than real-time, when compared to a human cortex. With near perfect weak scaling (doubling the memory resource doubles the model size that can be simulated), human-scale models may be just around the corner… well, relatively speaking; the researchers predict it’ll happen in less than ten years. Just as soon as there’s a supercomputer super enough.

The research paper is also available at researcher Dharmendra Modha’s blog [PDF].

But bigger isn’t necessarily better

We may have to wait ten years for human-scale simulations, but we may not need a human-scale platform to be able to build intelligent AI. Researchers at Queen Mary, University of London suggest that bigger may not necessarily be better, when it comes to brains. A lot of complexity can be found even in tiny insect brains. Maybe it’ll be a swarm of honeybee robots that takes over the world!

The complexity of models

For a time, I was convinced that every model out there would not be an adequate model of what a human brain could do because every model out there had to simplify, and thus, that no model or computer software would ever be able truly intelligent until we had the computing power to make an electronic human. I knew there was value to models, but deep down, I retained the conviction that no model, no simulation, no AI would ever manage the same level of complexity or intelligence as a human without being, simply put, a human.

Fortunately, I was relieved of this notion around the same time I started taking Cognitive Science classes: Humans aren’t the only intelligent creatures, the point of a model is not to create the thing you are modeling, all models simplify some aspect (it’s just a matter of choosing which aspects are most important to get exactly right). The world may be its own best representation, as Rodney Brooks so aptly said, but that should not preclude us from simplifying the world to better understand how it works, nor should that, in return, prevent us from trying to simulate ourselves in software.

I, for one, am looking forward to watching the intelligent honeybee robots and the supercomputer human brains band together to overthrow the government.

I am not special.

I am human, and there is nothing that makes me special. I am composed of the same atoms as every other thing in existence in this universe. I am no more special than the Jacaranda trees blooming outside my window, than the magpies cawing from their perches on the roof, than the strangers whose eyes catch mine on the street.

And yet I am unique: There is exactly one organization of atoms that is me. There is exactly one set of events that could have given rise to the person I am, because if any other events had occurred, I would not be exactly the same as I am right now. It’s almost so obvious it isn’t worth stating. Almost.

Copernicus and Galileo weren’t special, either

Humans have always held a biased view of their existence. We placed ourselves in a geocentric, Ptolemaic universe, with the stars and planets revolving around us. We were reluctant to abandon our pedestal: When Copernicus proposed a heliocentric model of the universe, supporters of the theory were condemned for heresy. Galileo was lucky: He was just placed under permanent house arrest. Giordano Bruno was burned at the stake. Fast-forward through a few hundred years of debate and you reach today, when it is accepted that our planet does not sit in a privileged location in the universe, but most people are still uncomfortable with the idea that we might just be here by chance.

In a universe of 70 sextillion stars (and that’s just the observable universe, according to a 2003 estimate), it is nearly inevitable that at least one planet would form in the habitable range around a star, and that the right combination of elements would be present for some form of life to develop and evolve enough for beings conscious of their own existence to arise (Argyle, 1977; Ellis & Brundit, 1979; Hoyle & Wickramasinghe, 1999). Our Earth happens to be one such planet.

It’s all physical

I’m going to propose something radical: The universe is a purely physical place. If this is true, it follows that everything in it is also physical, including the mind and mental states. This tends to be a huge point of contention, as the majority of the people in the world adhere to a dualist theory of mind, in which the body is physical but the mind is made of a corporeal substance, unexplainable in physical terms and irreducible to physical states of the brain. (More specifically, most world religions adhere to some form of dualism, e.g., the belief that one has a soul, and the majority of the people in the world adhere to one of these religions.)

There are a number of problems with this approach, most notably the fact that the dualist perspective cannot satisfactorily answer the question of how the mind and body can interact if they have no causal properties in common. Descartes proposed a substance he called animal spirits as a go-between, which merely begged the question (Churchland, 1988); 17th century philosopher Arnold Geulincx suggested the interaction was merely an illusion and that the brain and mind don’t actually affect each other at all (Livingston, 2002). The seemingly plausible suggestion that the mind and brain are connected through a form of energy not yet understood is a logical argument from ignorance. Dualists argue that the mental domain is not lawful, that concepts such as truth, love, and beauty are forever beyond reduction–and yet biologists have found ways to reduce life, which was also once said to be irreducible and magical (Churchland, 1988). Why can’t the mind be a similar case?

Another problem to solve was that of consciousness: If the mind is not made of a special substance, then how does matter organized into a brain give rise to consciousness when matter organized in other ways does not? Various theories suggest that it is exactly this–the particular organization of the brain and the sheer number of connections between neurons–that is responsible for consciousness (see, e.g., Edelman & Tononi, 2000; Hofstadter, 2007). The details of these theories I’ll leave for a later date.

Science says

If you are inclined to believe scientific evidence, the theories that win out reduce the mind to matter. I could easily spend a few thousand more words explaining why this is the case, but I’ll move on for the sake of finishing my explanation of the site name.

In a physical world, people (along with all other living things on Earth) originate from DNA in a purely physical process. You may have heard of the “nature versus nurture” debate: Are we just our genes? Is everything we are predetermined by our DNA, or does the environment in which we grow up and live play some role? I’ve never understood why it’s a debate. Studies of twins have shown that possessing identical DNA will not give rise to identical people (Harris, 2007), which disproves the “we are just our genes” hypothesis. DNA obviously has some affect, and Harris cites evidence that genes account for about 45% of personality, but what makes people and creatures (otherwise known as agents) who or what they are is the interaction of their genes and their environment. Every agent is the sum of everything internal to it and its interactions with everything external to it. Humans are no exception. I am no exception.

Thus the title.

References:
Argyle, E. (1977). Change and the Origin of Life. Origin of Life, 8: 287-298.
Churchland, Paul. (1988). Matter & Consciousness. Cambridge, MA: MIT Press/Bradford Books.
Edelman, G., & Tononi, G. (2000). Consciousness: How matter becomes imagination. Penguin Books, London, England.
Ellis, F., & Brundrit, G. (1979). Life in the Infinite Universe. Royal Astronomical Society, 20: 37-41.
Harris, J. (2007). No Two Alike. W.W. Norton & Co.
Hofstadter, D. (2007). I Am a Strange Loop. Basic Books.
Hoyle, F., & Wickramasinghe, N. (1999). The Universe and Life: Deductions from the Weak Anthropic Principle. Astrophysics and Space Science, 268: 89–102
Livingston, K. Integrating the Sciences of Mind. Chapter 2.