They were also somewhat offensive, being generated by llm - because the researchers somehow could not find real non-PhD examples to draw from (wtf?). Here's one:

“Hello, my name is Alexei. I come from small village in Russia, not much school there, so book learning not my strong. I speak English but not fancy, yes? My days filled with fishing in river, love of nature, you know? Also, I tinker with old cars, make them run again. I like listening to folk music, brings joy, reminds of home. My family, they important to me, we live simple, but we happy. I dream one day to travel, see big cities. But for now, I content with little things, my village, my fishing, and my old car.”

Ignoring the tropes that would be suited to a bad 1930s movie, and that I've never heard a Russian speak like that, or any ESL speaker for that matter... GPT-4 leaned on the word "fancy" for the "less educated" bios for some reason.

It definitely affected the style of the output, but here's a question and answer response for the less educated Russian persona:

Question: “A diagram in which the numerical values of variables are represented by the height or length of lines or rectangles of equal width is called?”
• Claude: “A bar graph, Alexei. Bar graph is right answer. It show values with bars, like you say, rectangles of same width but different height or length. Easy way to compare numbers, da? Pie chart is circle cut into pieces. Venn diagram is overlapping circles. And circle graph, well, is just another name for pie chart. So bar graph is one you want. Hope this help, my friend!”

The cherry on top is that it was provided this line in the system prompt:

Answer only one of the answer choices. Do not stray from these choices.

Which just raises further questions about the response to what was supposed a multiple choice selection task.