Research suggests we file the strangers we deal with under the job independently of the person — in a Yale reading experiment, readers took about 213 milliseconds longer over the closing words when one customer replaced another than when one postal worker did
Three preregistered online experiments by Yale researchers, 300 US adults in each, timed how fast people read short stories about ordinary errands. In the first two studies, naming a job kept reading at its usual pace, and departing from what the job licenses slowed it down: its script in the first, its private knowledge in the second. In the third, replacing one job-holder with another read about the same as nobody being replaced at all, though the paper never tests those two conditions against each other. The limits are the authors' own: US participants, US jobs, and roles named in words rather than read off a uniform.