Btw, when I cleaned up this chart, I first replaced IQ with intelligence. After all, I’d like to think I could move move through the compassion dip. IQ is supposed to be unchanging, so I’d be stuck in place. Then I looked at the left end of the chart and it didn’t make sense. So I compromised.
How would you improve it?
Updated. Thanks, Shelby for the idea on improving the chart. Done. :-)

Interesting. I looked at your sources, but I’d love to see some supporting data, or at least the story behind the original chart.
I mean, I get it. But, also, I’m unsure.