Discussion
Identify the information diffusion models :
(i) Epidemic model
(ii) Economic theory model
(iii) Engineering model
(iv) Ethnography model
Codes :
Answer: A
The keyed answer is (i) and (ii) are correct: the epidemic model and the economic theory model.
Information diffusion models describe how an idea or innovation spreads through a population. The epidemic model treats information like an infection that passes from those who have it to those who do not, an idea carried into information science by Goffman and Newill in 1964. The economic theory model explains adoption by costs and returns: a user takes up an innovation when it pays, as in Griliches' 1957 study of hybrid corn.
An 'engineering model' and an 'ethnography model' are not standard names for diffusion models (ethnography is a research method of field observation). Every other option includes one of them, so options B, C and D are wrong.
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