[Resident_Geek]

The Camel Has Two Humps was not successfully replicated. The authors presented http://crpit.com/confpapers/CRPITV78Bornat.pdf in 2008:

"Two years ago we appeared to have discovered an exciting and enigmatic new predictor of success in a first programming course. We now report that after six experiments, involving more than 500 students at six institutions in three countries, the predictive effect of our test has failed to live up to that early promise."

[ShardPhoenix]

The predictive test wasn't replicated - that doesn't sat anything about the original observation.

[tanzam75]

Right, programming is just very, very hard to teach. From the paper:

> And even in the most encouraging of our results, we find a 50% success rate in those who don’t score C0 or CM2.