Perceptual Contrast Effect: The same object can appear different when its surrounding context changes.
Contrast Changes Judgment: Something may feel larger, smaller, better, or worse depending on what it is compared with.
Size Contrast: An object looks larger beside smaller objects and smaller beside larger ones.
Light and Dark: The same colour can appear lighter on a dark background and darker on a light background.
Price Contrast: A moderate price can feel inexpensive after seeing a much higher-priced option.
Performance Contrast: The same result may seem impressive in a weaker group and disappointing in a stronger group.
Daily Example: A mid-range product feels valuable after a luxury option but ordinary after a budget option.
Why It Happens: The brain evaluates things relatively by using nearby information as a reference point.
Pause and Compare: Judge each option using independent standards instead of relying only on surrounding comparisons.
Key Lesson: Context can change perception even when the object itself remains exactly the same.