They also found those being trained to read angry expressions took a longer time to learn.They guess it may be because dogs find angry faces disgusting, causing them to withdraw quickly.However, once the smart dogs realized they were getting rewired, the trepidation seem end to disappear.In fact, the dogs had such a good time playing the computer "game" That scientists had a hard time keeping them away from the touch screens after the study was completed.
The researchers also noticed only dogs with a male owner had a harder time understanding the expressions correctly.Since the touches careen models were all females, this confirmed what has been observed in previous studies-dogs are more efficient at reading facial expressions of people that are the serene gender as their owner.
21.How did the scientists conduct the experiment?
A.By leaving dogs to women who are either happy or angry.
B.By mixing the selected dogs together.
C.By rewarding only half of the dogs touching the screen.
D.By showing digital pictures of women's happy or angry faces.
22.Which of the following statements is TRUE?
A.The dogs were not all provided with the entire face,
B.According to their size, the dogs were given either upper or lower halves.
C.The dogs could read even small changes that accountancy facial expressions after some training.
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