A Higher Error Rate in Making a Decision About Whether

A higher error rate in making a decision about whether a second stimulus (f₂) is different from the first baseline stimulus (f₁) is most likely to occur if

A) f₁ is somehow corrupted.
B) f₁ is not salient (meaningful) enough.
C) f₂ is somehow corrupted.
D) (f₁ - f₂) is large; i.e., there is a long delay between the two stimuli.
E) (f₁ - f₂) is small; i.e., there is a short delay between the two stimuli.