V. interesting, Nick. Have requested full-text access at ResearchGate

Indeed (your confession), I generally find that unpacking an argument from a text, mapping it, and then re-writing it based on the map, results in a far more coherent text than the original.

Yes, the research showing improvements in critical thinking following the use of argument mapping is dodgy. Your poster had me laughing out loud and nodding my head in agreement!

Update.. These people are now charging. I found another - free for now: elevenlabs.io

I was able to make this: www.ialf.edu/eap/pronunci...

Fantastic for materials dev. Thanks, Nik!