This study is a joke. The bios listed at the end of the paper are the cause of their issues.

Less Educated ESL: “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…

It goes on like that! This is their input!! The LLM is just mirroring their style.

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!