Are the sentences true or false?

Before this experiment, dog owners didn't think dogs could sense their emotions. ...

The left and right sides of a person's face look different when the person is expressing emotion. ...

You can see how people really feel by looking at the left side of their face. ...

Scientists had thought that only humans had a left-gaze bias. ...

In the experiment, dogs were only shown faces. ...

Dogs look left when shown another dog's face. ...

Other animals also look left when looking at a human face. ...

Being able to detect human emotions gives dogs a biological advantage. ...