CMN 150V Final Exam Review Test.

CMN 150V Final Exam Review Test.How much do some top celebs get paid per tweet? - correct answer $10,000 or more What are 2 complementary aspects of computational social science Lamberson talks about? - correct answer empirical work and computer simulations Are celebs the only people to have influence in society? - correct answer No Can just anybody be influential? - correct answer yes What trick did Lamberson use in order to track who reposted url link to a story on Twitter? - correct answer he tracked short url, which are unique to the post What are 'Twitter Cascades'? - correct answer an info diffusion process on Twitter in which a number of people make the same decision of passing along info in a sequential fashion Do all posts go viral? - correct answer the vast majority of posts never get retweeted, but a small fraction of links go viral If something went viral, looking at it, there is a high probability that it had been sent by an influencer: p(influencer | viral). What about p(viral | influencer), the probability that something goes viral, given that it was sent by an influencer? - correct answer low probability The proposed model consists of the following: - correct answer take a hypothetical network, select some nodes, and simulate a contagion process by assuming that neighboring nodes have a fixed probability of getting infected The horizontal x-axis presents: - correct answer if a given network(of simulated networks) has few or many links What determines what spreads or not? - correct answer density of network Even though we cannot predict who is influential, why is it worthwhile for companies to pay large amounts of money to celebs to send messages? - correct answer chances are that among the people reached by them, some turn out to be influential, who will the influence others What determines if an individual can trigger a cascade? - correct answer depends much more on the global structure of the influence network than it does on his or her personal degree on influence Can anyone start a cascade? - correct answer the overall network permits global cascades anyone can start one but if it doesnt then no one can What determines if someone is influential? - correct answer depends on the general structure of the network What is the difference between this lecture on social network analysis and the previous lectures on the same topic? - correct answer today, we will look at dynamically evolving networks and starts to simulate theoretical networks T or F? In science, things can be distributed in 4 diff ways: normal, poisson, exponential, powerlaw - correct answer false T or F? In science, things can be distributed in random, scale free, small world, hub/spoke networks - correct answer false What is one common way to scientifically test whether there's something special about your network? - correct answer you create a large number of random networks and compare your network with it Let's assume a very simple network with 3 nodes(A,B,C) and one (undirected) link: G(N,M) = G(3,1). How many different networks can you form with that? - correct answer 3 What was the differnece between the "numerical solutions" and "analytical solution"? - correct answer numerical: enumerate the options and basically count analytical: use math to derive the results In network analysis, a component is: - correct answer a part of the network in which a path can get you from a node to any other node Why do you need at least one connection per node in order for the giant component to dominate? - correct answer everybody can have one friend (on average) making a chain of friends Who will have more links? - correct answer older nodes What does preferential attachment mean? - correct answer the probability of a node to connect with new nodes corresponds to the number of existing degrees of a node What does preferential attachment say in this case? The probability that a new node: - correct answer connects to each one of them is equally likely What doe sit mean that something is distributed according to a power law? - correct answer exponentially few, have exponentially much, and exponentially many, have exponentially little