Final answer:
Anna and Robert's constant query 'Are we there yet?' during a car trip is an example of perseveration, which involves repeating a specific response in the absence of a stimulus.
Step-by-step explanation:
During their car trip, Anna and Robert's repeated questioning of "Are we there yet?" demonstrates perseveration. Perseveration is a psychological term that refers to the repetition of a particular response, such as a word, phrase, or gesture, despite the absence or cessation of a stimulus. Examples of perseveration are seen in different contexts, such as a toddler's insistence on a specific routine or an individual's continuous engagement with a particular subject due to cognitive or emotional challenges.