You try a new potato chip and it tastes great, so you encourage a friend to try it. He tastes a new chip, then an old-Style chip, and finally says that as far as he is concerned, all potato chips taste the same. The behavior of your friend is most similar to what might occur in a study of
◦ difference thresholds.
◦ absolute thresholds.
◦ accommodation.
◦ response bias.