I'm not even sure how that makes sense. What is a truck to a monkey and how does it have anything to do with gender? How sensitive could this test be to the bia

I'm not even sure how that makes sense. What is a truck to a monkey and how does it have anything to do with gender? How sensitive could this test be to the bias of the researchers? The abstract you posted says nothing about a difference in vision in day old children. At 13 weeks there's plenty of time for differences in environment to have already taken hold between males and females. I'm very unconvinced we could even measure such a cognitive difference divorced from environment.