This is a severe psychological disorder that is characterize…

This is a severe psychological disorder that is characterized by disturbances in thought, language, perception, attention, mood, motor activity, and the withdrawal and absorption in daydreams or fantasy. It has been referred to as the worst psychological disorder affecting humans, afflicting 1% or the world’s population.

Christine uses an electric can opener to open cans of dog fo…

Christine uses an electric can opener to open cans of dog food. After the first few times of using the electric opener to open the dog food, she notices that her dog starts to salivate just at the sound of the electric can opener in anticipation of food. According to the principles of classical conditioning, the electric can opener has become an effective _____ for Christine’s dog.