> The main difference between the two experiments was that dogs in study 1 showed a general bias toward looking at the spiky shapes. That bias disappeared in study 2, when their owners were wearing headphones.
... so, they accounted for it, and the control group (group wearing headphones) showed no significance in the dog's behavior. Seems like a huge claim when their control group to rule out the hans effect failed.
> The main difference between the two experiments was that dogs in study 1 showed a general bias toward looking at the spiky shapes. That bias disappeared in study 2, when their owners were wearing headphones.
... so, they accounted for it, and the control group (group wearing headphones) showed no significance in the dog's behavior. Seems like a huge claim when their control group to rule out the hans effect failed.