You Probably Can Detect a Weight Difference Between a 1-Ounce

question 136

Multiple Choice

You probably can detect a weight difference between a 1-ounce and a 2-ounce envelope. But if you pick up a 20-pound package, you'd probably need another package that weighs at least 20.5 pounds before detecting a difference between them. This description illustrates:

• A)Weber's law.
• B)signal detection theory.
• C)gate-control theory.
• D)perceptual constancy.