NPTEL Social Networks Week 4 Assignment Answers 2024
1. Which of the following is an example of homophily?
- A diverse team working together to solve a problem
- People of the same ethnicity forming a community group
- Randomly assigned roommates becoming friends
- A mentor-mentee relationship between individuals from different backgrounds
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2. Which of the following best describes the concept of selection in homophily?
- The tendency of people to change their beliefs to fit those of their social group
- The process by which individuals choose to associate with others who are similar to themselves
- The influence of group norms on individual behaviors
- The random formation of social ties without regard to similarity
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3. Suppose we have a network in which a p fraction of all individuals are male, and a q fraction of all individuals are female. If the fraction of cross-gender edges is significantly less than 2pq, then there is evidence for homophily. For a network to have a fraction of cross-gender edges that is significantly more than 2pq, the network exhibits
- inverse homophily
- triadic closure
- membership closure
- foci closure
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4. Suppose Ram and Chander have k common friends. Given that each common friend gives Ram and Chander an independent probability p of forming a link, what is the probability of not forming a friendship between Ram and Chander because of k common friends?
- pk
- (1−p)
- (1−p)k
- 1−(1−p)k
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6. Identify the mechanism in play for the following context: ‘Karate club introduces Anna to Daniel’
- Triadic closure
- Focal closure
- Membership closure
- Neighborhood overlap
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7. Identify the mechanism in play for the following context: ‘Anna introduces Bob to Sam’
- Triadic closure
- Focal closure
- Membership closure
- Neighborhood overlap
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8. Given the average similarity of two editors on Wikipedia, relative to the time (0) represented by the dotted line at which they first communicated. Time, on the x-axis, is measured in discrete units, where each unit corresponds to a single Wikipedia action taken by either of the two editors. The rapid increase in similarity before first contact is due to
- Selection
- Social Influence
- Tradic closure
- Focal closure
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9. In a scenario, if there were two friends and one person is a part of a Dance Crew and he influences the other to take part in it this will lead to
- Triadic closure
- Focal closure
- Membership closure
- Selection
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10. Consider an evolving network; evolving in the following two ways.
A: With time, new edges are being formed in the network.
B: Also, with time, nodes in the network are changing their attributes. A and B represent
- Homophily and social influence
- Triadic closure and social influence
- Homophily and focal closure
- Triadic closure and membership closure
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