Answer:
contrast effects
Explanation:
Contrast effects is a change of perception when we compare something with something else thereby noticing the difference between them. These comparisons can be color, price, taste.
Contrast effects can make a color appear darker when placed in a lighter background or that an item appear to be cheap when place after being shown a more expensive item. Contrast effects can either be positive or negative.
A positive Contrast effect is one that makes an item better than it is while a negative Contrast effect make an item worse than it is.