Dominique is making a rice dish for 5 people that requires 4 teaspoons of salt. If she were to add just one more teaspoon of salt to the rice after tasting it, half of the time she would be able to notice a difference. If Dominique decides to triple her recipe to feed 15 people, which would call for a total of 12 teaspoons of salt, how many teaspoons of salt would need to be added for a person to be able to taste the difference half of the time?

When Consuela first put on her scarf, she could feel it quite easily. After a while, however, Consuela forgot that she was wearing a scarf at all; the sensation was gone. Which of the following processes is occurring?

Fenhua got into his car and turned on the radio. He turned the volume up to a comfortable level. After a few minutes of driving, however, the once-comfortable level seemed to be too low, so Fenhua turned up the volume. What has happened?

The term _____ refers to stimuli that are below the level of conscious awareness.

The tendency of the brain to stop attending to constant, unchanging information is known as

Many people believe that some stimuli act upon the unconscious mind and influence behavior, a process called

_____ is the way the brain deals with unchanging information from the environment.

If a researcher finds that one drop of perfume diffused through a three-room apartment is the minimum amount of stimuli needed to notice the scent, then this would be a test of one's