Barely describes the technique, they spend more ink on the other methods and then describe the study but not what the actual technique is and why or how it's unique.

I wonder if they know that curso in Panama means diarrhea? My mother would laugh every time she said that she had to take a curso, since it came up often since she was a teacher.

I was hoping for a little more detail like with the other method mentioned and described in more detail. I didn't have time to go to the actual research paper, thanks for the link!

Oral historians here and I imagine elsewhere use a sort of musical chant form. I've heard it but knew better than to ask for a translation. Some of it has been shared with the latest crop of anthropologists who, instead of digging up their ancestors and sending them to the Smithsonian, are using GPR to identify burials so they don't disturb the dead. That's going a long way toward interesting tribal people in anthropology.

A story that came out last year that astonished me was this: https://www.ancient-origins.net/news-evolution-human-origins/budj-bim-0013281 A history that stretches back tens of thousands of years is astonishing enough, but having it in an intact oral form is mind blowing to those of us who played "gossip" as kids.

It's said that the Druids refused to write any of their lore down because that would decrease the ability to memorize. Maybe they were correct.

I studied cultural anthropology in college with attention to linguistics. I find many practices of long ago cultures that survive into to the present are common among cohorts on different continents. The maintenance of historic record had a methodology which seems to be where ritual comes in. Memory is prompted by familiar activity so rituals would be a way to facilitate that awakening of one's memory. I suppose the method mentioned in the article might show evidence that something of that sort was a major component of the method they identified.