Humans Actual, Imagined, and Implied
This chapter begins by taking a look at the study of minds. The work of Claude Shannon is first examined, as he proposed information could be conceptualized mathematically as a kind of inverse function of probability. It goes through some of his studies dealing with randomly selecting letters from a page based on their probable conjunction with other letters. Since he lived before computers, they expanded his work using a computer model to show how things began to make more and more sense the further out you branched.
The next area they address was the fall of the behaviorist paradigm. Here they talked about the traditional aspects of psychological study based on behavior. Through the section they try to explain the basis of the behaviorist perspective, and begin to look at the problems that plagued it. This was immediately followed by the cognitive revolution. Here they begin talking about the shift in paradigm where minds were beginning to be thought of in terms of cognition rather than behavioral. They also talk about the impact this had on the development of AI systems at the time. These discussions worked towards the Bandura Social Learning Paradigm. This is the system that provided the foundation for social psychology, or looking at the learning/abilities of individuals in terms of the group they were in.
Social psychology is the focus of the next section. They begin the section by talking about the history, and development of the disciplines proponents. Initially, they focus on discussion of the principles of Gestalt psychology brought over by Germans in the mid twenty century. The main point here was that they were trying to establish that the mind attempts to make sense of the object in a coherent manor regardless of their actual nature. The next discussion takes a look at the Lewin field theory. Here they discuss his proposed life space and how it was portrayed at the time. His work is considered the stage for modern complex systems theory in psychology. Social influence is examined as the first prime example of social psychology. Here they look into how and why humans establish norms, conform, and the impact of social influence. They review various studies that show how powerful the influence of others can impact an individual. The next area covered is sociocognition. They talk about examples by where people can share collective understanding where by each individual only knows a fragment of the whole picture.
Pulling this all together into a more useful form, the next section begins to talk about simulating social influence. Here they are examine what exactly the difference is between a simulated mind, and a real mind. Though there is no definitive point, they seem to put forth the idea that a simulated mind is an actual mind. They then begin talking about trying to figure out how various modes of thought are conducted in order to model them properly in simulation. The next area of discussion is the shift from traditional AI to evolution methods. They start by taking about the history of bad blood between the two. Then talk about the strengths and weaknesses of both. It boils down to the fact that tradition AI is not good at handling simple tasks that evolutionary methods excel at. From here they begin talking about the evolution of cooperation. Through a discussion of the prisoners dilemma they examine how cooperation between individuals can greatly influence the rewards each member receives. The next area of discussion was an attempted explanation for the need for coherence. From there they begin to talk about networks in groups. Here they began to look at how groups of people were able to communicate, and thus come to some kind of consensus. To do this they used constraint satisfaction networks (which were explained in chapter 2).
In the following section, there is discussion about culture in theory and practice. The section begins by trying to establish whether or not culture is a thing that actually exists, or an abstraction. Eventually, they decide it is something, and begin to pursue principles based on that conjecture. First they begin to illustrate how computer simulations can represent the behavior of individuals in a social context. To demonstrate this point they use the example of the prisoners dilemma. The El Farol problem was then examined (Irish drinking night), this showed simulated interaction between agents that developed sophisticated negotiation techniques in order to trick other agents. It is basically a situation were you think you know what the other knows, but they know what you know soSugarscape was then discussed, here they were trying to grow artificial societies. The most interesting note here was the emergence of sophisticated immune systems that developed in the agents. The next system was Tesfatsions ACE. This was a system that modeled complex economic systems based on a modified version of the prisoners dilemma. The following sample was Pickers competing-norms model, where he tried to show how some behaviors might remain dominant when better behaviors are available in the environment. Latens dynamic social impact theory. This talked about how more people yield less impact on the system, and also showed concepts such as minority attitudes in populations are achieved at steady state. The evolutionary culture model established by Boyd and Richerson was then talked about. It basically discusses the link between cultural, and biological evolution. To further this discussion they follow up by talking about memetic (first talked about in chapter 1), and their relevance. Memetic algorithms are then talked about. One good example is the one created by Burke and Smith. Advancing another step in the scale, they begin talking about cultural algorithms. They end the section by talking about the convergence between social scientists and computer simulations.
The chapter wraps up by taking a look at what life might be like without culture. In the section they take a look at multiple instances of feral children that are found in the wild, and they talk about their tendencies and inability to become civilized. The picture they paint is very dismal, as they try to say that advanced intelligence comes from culture, rather than the individual.
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