What's the Validity of the PT?

Evan: I tried looking it up, and although I could find references to it, I really thought you couldn't find an example of what it was. You're never going to be able to like just find reproduced pages from a waste, for example, like an intelligence test online. It's just, there's copyright issues around that. So this is how they made the test normally for primates and turned it into a Raven test. They compared the cognitive performance of the Ravens with those of 106 chimpanzees and 32 orangutans who completed similar tasks in a previous study. And they found that with the exception of spatial memory, the cognitiveperformance of the Ravens was very similar to those of