Answer:
A dog's tail wagging will be the same in response to positive stimuli as to negative stimuli.
Step-by-step explanation:
All the dogs responded by wagging their tails to the right. But when the dogs were presented with an unfamiliar, aggressive dog, a negative stimulus, all dogs wagged their tails to the left. The research hypothesis for this study is that A dog's tail wagging will be the same in response to positive stimuli as to negative stimuli.