what does the three factor theory state about it?
When elicited agent knowledge is low and effectance and sociality are high, people are more likely to anthropomorphize.
Anthropomorphism
Psychologist Adam Waytz and his colleagues created a three-factor theory of anthropomorphism to describe these aspects and predict when people are most likely to anthropomorphize. The three factors are:
When elicited agent knowledge is low and effectance and sociality are high, people are more likely to anthropomorphize. 
who did the voice of rush limbaugh on family guy Rush Limbaugh. what is excellence in broadcasting? It is the second episode of a series. which series? "Family Guy". what is the plotline of this episode? The episode features anthropomorphic dog Brian, an adamant liberal, confronting conservative radio talk show host Rush Limbaugh at a book signing in Quahog, and ultimately having a political change of heart when Limbaugh convinces him to read his latest book. what genre is followed in it? Animated comedy series. what does the term which was used to refer the dog brian mean? Attribution of human traits, emotions, or intentions to non-human entities. how did the term come into existence? From the Greek words  "ánthrōpos" and "morphē".
wiki:22069152
Anthropomorphism [SEP] Three-factor theory
Since making inferences requires cognitive effort, anthropomorphism is likely to be triggered only when certain aspects about a person and their environment are true. Psychologist Adam Waytz and his colleagues created a three-factor theory of anthropomorphism to describe these aspects and predict when people are most likely to anthropomorphize. The three factors are: When elicited agent knowledge is low and effectance and sociality are high, people are more likely to anthropomorphize. Various dispositional, situational, developmental, and cultural variables can affect these three factors, such as need for cognition, social disconnection, cultural ideologies, uncertainty avoidance, etc.