Humans are hardwired to do what we see, hence the term, monkey see, monkey do. The relationship between “catching” a yawn and social behavior is that we subconsciously “catch” the yawn to be seen as “normal” because it is what someone around us has done. A lot of it goes back to psychology. I would suggest looking up Solomon Asch’s human conformity experiment to get a better understanding. :)
The point of view in this excerpt is definitely third person, because nouns such as Dorothy, and pronouns such as she are used throughout to indicate third person.
However, if you also need to decide whether it is limited or omniscient, I'd choose limited - because we can only see what she is doing, and not what she is thinking and feeling.
Internal coherence is a level of integrity within the individual learning solution.